Table Of Contents
Clear Channel T3/E3 with Integrated CSU/DSU
Contents
Prerequisites for Clear Channel T3/E3 with Integrated CSU/DSU
Information About Clear Channel T3/E3 with Integrated CSU/DSU
How to Configure the Clear Channel T3/E3 with Integrated CSU/DSU Feature for a T3 Interface
Configuring the Card Type and Controller for a T3 Interface
Configuring DSU Mode and Bandwidth for T3
Configuring Scrambling for T3
Configuring the BERT for T3
Configuring Loopback for T3
Configuring the T3 Maintenance Data Link
How to Configure the Clear Channel T3/E3 with Integrated CSU/DSU Feature for an E3 Interface
Configuring the Card Type and Controller for an E3 Interface
Configuring DSU Mode and Bandwidth for E3
Configuring Scrambling for E3
Configuring the BERT for E3
Configuring Loopback for E3
Configuring National Bit for E3
Verifying the T3 or E3 Configuration
Troubleshooting Tips
Configuration Example for the Clear Channel T3/E3 with Integrated CSU/DSU Feature
Additional References
Related Documents
Standards
MIBs
RFCs
Technical Assistance
Command Reference
Glossary
Clear Channel T3/E3 with Integrated CSU/DSU
The Clear Channel T3/E3 NM-1 Network Module with Integrated CSU/DSU feature provides a software configurable T3/E3 product. This flexible network module allows you to switch between T3 and E3 applications with a single Cisco IOS command.
The T3/E3 NM-1 network module supports a single-port T3 or E3 with an integrated channel service unit (CSU) and a data service unit (DSU). It supports High-Level Data Link Control (HDLC), PPP, and Frame Relay. It includes the following features:
•
Single port—universal T3/E3 version
•Clear and subrate support on both T3 and E3 modes
•Online insertion and removal (OIR) support on Cisco 3660 series and Cisco 3745 routers
•Onboard processing of Cisco Message Definition Language (MDL) and performance monitoring
•Support for scrambling and subrate can be independently or simultaneously enabled in each DSU mode
•Support for full T3 and E3 line rates
T3/E3 Applications and Positioning
The T3/E3 NM-1 network module provides high-speed performance for advanced, fully converged networks supporting a wide array of applications and services such as security and advanced QoS for voice and video. T3/E3 and subrate T3/E3 connectivity optimizes WAN bandwidth for deploying the new applications and service delivery. All the supported platforms, except the Cisco 2650XM or Cisco 2651XM routers, are capable of supporting line rate performance but impose varying levels of CPU overhead and therefore affect the overall platform performance. See Table 1 for recommended branch office positioning.
Table 1 T3/E3 NM-1 Branch Office Positioning and Support Comparison
Supported Platforms
|
Recommended Type of Service
|
Recommended Branch Office Sizes
|
Maximum T3/E3 Modes Supported
|
Cisco 2650/2651XM
|
Subrate T3/E3
|
Small to medium offices
|
1 1
|
Cisco 2691
|
Subrate T3/E3
|
Small to medium offices
|
1
|
Cisco 3660 series
|
Subrate and full-rate T3/E3
|
Large and regional offices
|
1
|
Cisco 3725
|
Subrate and full-rate T3/E3
|
Medium and large offices
|
1
|
Cisco 3745
|
Subrate and full-rate T3/E3
|
Medium, large, and regional offices
|
2
|
Feature Specifications for the Clear Channel T3/E3 with Integrated CSU/DSU Feature
Feature History
|
|
Release
|
Modification
|
12.2(11)YT
|
This feature was introduced.
|
12.2(15)T
|
This feature was integrated into Cisco IOS Release 12.2(15)T.
|
Supported Platforms
|
Cisco 2650XM, Cisco 2651XM, Cisco 2691, Cisco 3660 series, Cisco 3725, and Cisco 3745
|
Finding Support Information for Platforms and Cisco IOS Software Images
Use Cisco Feature Navigator to find information about platform support and Cisco IOS software image support. Access Cisco Feature Navigator at http://www.cisco.com/go/fn. You must have an account on Cisco.com. If you do not have an account or have forgotten your username or password, click Cancel at the login dialog box and follow the instructions that appear.
Contents
•Prerequisites for Clear Channel T3/E3 with Integrated CSU/DSU
•Information About Clear Channel T3/E3 with Integrated CSU/DSU
•How to Configure the Clear Channel T3/E3 with Integrated CSU/DSU Feature for a T3 Interface
•How to Configure the Clear Channel T3/E3 with Integrated CSU/DSU Feature for an E3 Interface
•Configuration Example for the Clear Channel T3/E3 with Integrated CSU/DSU Feature
•Additional References
•Command Reference
•Glossary
Prerequisites for Clear Channel T3/E3 with Integrated CSU/DSU
•Implementation of this feature requires Cisco IOS Release 12.2(11)YT or a later release.
•See Table 2 for the minimum platform memory recommended.
Table 2 Minimum Memory Requirements
Supported Platforms
|
Flash Memory
|
DRAM Memory
|
Cisco 2650/2651XM
|
8 MB
|
32 MB
|
Cisco 2691
|
32 MB
|
64 MB
|
Cisco 3660 series
|
8 MB
|
64 MB
|
Cisco 3725
|
32 MB
|
128 MB
|
Cisco 3745
|
32 MB
|
128 MB
|
Information About Clear Channel T3/E3 with Integrated CSU/DSU
Configuration of the Clear Channel T3/E3 with Integrated CSU/DSU feature can be set up for a T3 interface and for an E3 interface:
•How to Configure the Clear Channel T3/E3 with Integrated CSU/DSU Feature for a T3 Interface
•How to Configure the Clear Channel T3/E3 with Integrated CSU/DSU Feature for an E3 Interface
How to Configure the Clear Channel T3/E3 with Integrated CSU/DSU Feature for a T3 Interface
This section describes the tasks used to configure the Clear Channel T3/E3 with Integrated CSU/DSU feature for a T3 interface:
•Configuring the Card Type and Controller for a T3 Interface (required)
•Configuring DSU Mode and Bandwidth for T3 (required)
•Configuring Scrambling for T3 (optional)
•Configuring the BERT for T3 (optional)
•Configuring Loopback for T3 (optional)
•Configuring the T3 Maintenance Data Link (optional)
Configuring the Card Type and Controller for a T3 Interface
When the Clear Channel T3/E3 network module is used for the first time, the running configuration does not show the T3/E3 controller and its associated serial interface. You can use the show version command to learn if the router recognized the T3/E3 card and was able to initialize the card properly. After the card type is configured for the slot, the respective controller and serial interface appear in the running configuration. See the "Use the show version Command" section.
After the network module has ascertained that the card has been initialized properly, use the card type command to configure the card. If the command is accepted successfully, Cisco IOS software creates a controller and a serial interface for the card.
Perform this task to select and configure a card type and controller as T3.
Note The autoconfig/setup utility does not support configuring the card type for the T3/E3 network module.
SUMMARY STEPS
1. enable
2. configure terminal
3. card type t3 slot
4. controller t3 slot/port
5. framing {c-bit | m23}
6. cablelength feet
7. clock source {internal | line}
8. exit
DETAILED STEPS
| |
Command or Action
|
Purpose
|
Step 1
|
enable
Example:
Router> enable
|
Enables privileged EXEC mode.
•Enter your password if prompted.
|
Step 2
|
configure terminal
Example:
Router# configure terminal
|
Enters global configuration mode.
|
Step 3
|
card type t3 slot
Example:
Router(config)# card type t3 1
|
Selects the card type.
•Creates a T3 controller and a serial interface.
•t3—Selects the T3 controller.
•slot—Slot number of the interface.
•By default, the T3 controller does not show up in the show running-config output.
|
Step 4
|
controller t3 slot/port
Example:
Router(config)# controller t3 1
|
Specifies the T3 controller and enters controller configuration mode.
•slot/port—Backplane slot number and port number on the controller.
|
Step 5
|
framing {c-bit | m23}
Example:
Router(config-controller)# framing c-bit
|
Specifies the framing type.
•c-bit—Specifies C-bit framing as the T3 framing type.
•m23—Specifies M23 framing as the T3 framing type.
|
Step 6
|
cablelength feet
Example:
Router(config-controller)# cablelength 250
|
Specifies the distance from the routers to the network equipment.
•feet—Number of feet in the range from 0 to 450.
•The default value is 224 feet.
|
Step 7
|
clock source {internal | line}
Example:
Router(config-controller)# clock source line
|
Selects the clock source.
•internal—Specifies that the internal clock source is used. This is the default for T3.
•line—Specifies that the network clock source is used. This is the default for E3.
|
Step 8
|
Example:
Router(config-controller)# exit
|
Exits controller configuration mode and returns to privileged EXEC mode.
|
Configuring DSU Mode and Bandwidth for T3
Perform this task to specify the interoperability mode and maximum allowable bandwidth used by a T3 controller.
SUMMARY STEPS
1. enable
2. configure terminal
3. interface serial slot/port
4. dsu mode {0 | 1 | 2 | 3 | 4}
5. dsu bandwidth kbps
6. exit
DETAILED STEPS
| |
Command
|
Purpose
|
Step 1
|
enable
Example:
Router> enable
|
Enables privileged EXEC mode.
•Enter your password if prompted.
|
Step 2
|
configure terminal
Example:
Router# configure terminal
|
Enters global configuration mode.
|
Step 3
|
interface serial slot/port
Example:
Router(config)# interface serial 1/1
|
Specifies the serial interface created on the controller.
|
Step 4
|
dsu mode {0 | 1 | 2 | 3 | 4}
Example:
Router(config-if)# dsu mode 0
|
Specifies the interoperability mode used by a T3 controller.
•0—Connects a T3 controller to another T3 controller or to a Digital Link DSU (DL3100). Bandwidth range is from 300 to 44210 kbps. This is the default.
•1—Connects a T3 controller to a Kentrox DSU. Bandwidth range is from 1500 to 35000/44210 kbps.
Note If the bandwidth is set to greater than 35000 kbps, it defaults to 44210 kbps.
•2—Connects a T3 controller to a Larscom DSU. Bandwidth range is from 3100 to 44210 kbps.
•3—Connects a T3 controller to an Adtran T3SU 300. Bandwidth range is from 75 to 44210 kbps.
•4—Connects a T3 controller to a Verilink HDM 2182. Bandwidth range is from 1500 to 44210 kbps.
|
Step 5
|
dsu bandwidth kbps
Example:
Router(config-if)# dsu bandwidth 44210
|
Specifies the maximum allowable bandwidth in the range from 1 to 44210 kbps.
•The real (actual) vendor-supported bandwidth is in the range from 75 to 44210 kbps.
Note For the Cisco 2650XM and Cisco 2651XM platforms only, we recommend that you set the DSU bandwidth to 15000 in any subrate mode.
|
Step 6
|
Example:
Router(config-if)# exit
|
Exits interface configuration mode and returns to privileged EXEC mode.
|
Configuring Scrambling for T3
Perform this task to enable encryption of the payload on the T3 controller.
SUMMARY STEPS
1. enable
2. configure terminal
3. interface serial slot/port
4. scramble
5. exit
DETAILED STEPS
| |
Command
|
Purpose
|
Step 1
|
enable
Example:
Router> enable
|
Enables privileged EXEC mode.
•Enter your password if prompted.
|
Step 2
|
configure terminal
Example:
Router# configure terminal
|
Enters global configuration mode.
|
Step 3
|
interface serial slot/port
Example:
Router(config)# interface serial 1/1
|
Enters interface configuration mode.
|
Step 4
|
scramble
Example:
Router(config-if)# scramble
|
Enables the scrambling of the payload.
•Default is off.
|
Step 5
|
Example:
Router(config-if)# exit
|
Exits interface configuration mode and returns to privileged EXEC mode.
|
Configuring the BERT for T3
Perform this task to configure a bit error rate (BER) test pattern on a T3 controller.
SUMMARY STEPS
1. enable
2. configure terminal
3. controller t3 slot/port
4. bert pattern {2^23 | 2^20 | 2^15 | 1s | 0s | alt-0-1} interval time
5. no bert
6. exit
DETAILED STEPS
| |
Command
|
Purpose
|
Step 1
|
enable
Example:
Router> enable
|
Enables privileged EXEC mode.
•Enter your password if prompted.
|
Step 2
|
configure terminal
Example:
Router# configure terminal
|
Enters global configuration mode.
|
Step 3
|
controller t3 slot/port
Example:
Router(config)# controller t3 1/1
|
Selects the T3 controller and enters controller configuration mode.
•slot/port—Backplane slot number and port number on the controller.
|
Step 4
|
bert pattern {2^23 | 2^20 | 2^15 | 1s |
0s | alt-0-1} interval time
Example:
Router(config-controller)# bert pattern
2^20 interval 10000
|
Configures a bit error rate test pattern.
•Acceptable values are:
–2^23—Pseudorandom 0.151 test pattern that is 8,388,607 bits in length.
–2^20—Pseudorandom 0.153 test pattern that is 1,048,575 bits in length.
–2^15—Pseudorandom 0.151 test pattern that is 32,768 bits in length.
–1s—Repeating pattern of ones (...111...).
–0s—Repeating pattern of zeros (...000...).
–alt-0-1—Repeating pattern of alternating zeros and ones (...01010...).
•interval time—Specifies the duration of the BER test. The interval can be a value from 1 to 14,400 minutes.
|
Step 5
|
no bert
Example:
Router(config-controller)# no bert
|
Disables the BERT test pattern.
|
Step 6
|
exit
Example:
Router(config-controller)# exit
|
Exits controller configuration mode and returns to privileged EXEC mode.
|
Configuring Loopback for T3
Perform this task to loop an entire T3 line toward the line and back toward the router.
SUMMARY STEPS
1. enable
2. configure terminal
3. controller t3 slot/port
4. loopback {local | network {line | payload} | remote}
5. no loopback
6. exit
DETAILED STEPS
| |
Command
|
Purpose
|
Step 1
|
enable
Example:
Router> enable
|
Enables privileged EXEC mode.
•Enter your password if prompted.
|
Step 2
|
configure terminal
Example:
Router# configure terminal
|
Enters global configuration mode.
|
Step 3
|
controller t3 slot/port
Example:
Router(config)# controller t3 1/1
|
Selects the T3 controller and enters controller configuration mode.
•slot/port—Backplane slot number and port number on the controller.
|
Step 4
|
loopback {local | network {line |
payload} | remote}
Example:
Router(config-controller)# loopback local
|
Loops the T3 line toward the line and back toward the router,
•local—Loops the data back toward the router and sends an AIS signal out toward the network. On a dual port card, it is possible to run channelized on one port and primary rate on the other port.
•network {line | payload}—Sets the loopback toward the network before going through the framer (line) or after going through the framer (payload).
•remote—Sends a far-end alarm control (FEAC) request to the remote end requesting that it enter into a network line loopback. FEAC requests (and therefore remote loopbacks) are possible only when the T3 is configured for C-bit framing. M23 format does not support remote loopbacks.
|
Step 5
|
no loopback
Example:
Router(config-controller)# no loopback
|
Removes the loop.
|
Step 6
|
Example:
Router(config-controller)# exit
|
Exits controller configuration mode and returns to privileged EXEC mode.
|
Configuring the T3 Maintenance Data Link
Perform this task to configure the MDL message.
Note This configuration information is applicable only to C-bit parity T3.
SUMMARY STEPS
1. enable
2. configure terminal
3. controller t3 slot/port
4. mdl {transmit {path | idle-signal | test-signal} | string {eic | lic | fic | unit | pfi | port | generator} string}
5. exit
DETAILED STEPS
| |
Command
|
Purpose
|
Step 1
|
enable
Example:
Router> enable
|
Enables privileged EXEC mode.
•Enter your password if prompted.
|
Step 2
|
configure terminal
Example:
Router# configure terminal
|
Enters global configuration mode.
|
Step 3
|
controller t3 slot/port
Example:
Router(config)# controller t3 1/1
|
Selects the T3 controller and enters controller configuration mode.
•slot/port—Backplane slot number and port number on the controller.
|
Step 4
|
mdl {transmit {path | idle-signal |
test-signal} | string {eic | lic | fic |
unit | pfi | port | generator} string}
Example:
Router(config-controller)# mdl transmit
path
|
Configures the MDL message.
•transmit path—Enables transmission of the MDL Path message.
•transmit idle-signal—Enables transmission of the MDL idle signal message.
•transmit test-signal—Enables transmission of the MDL test signal message.
•string eic string—Specifies the equipment identification code (EIC); can be up to 10 characters.
•string lic string—Specifies the location identification code (LIC); can be up to 11 characters.
•string fic string—Specifies the frame identification code (FIC); can be up to 10 characters.
•string unit string—Specifies the unit identification code (UIC); can be up to 6 characters.
•string pfi string—Specifies the facility identification code (PFI) sent in the MDL path message; can be up to 38 characters.
•string port string—Specifies the port number string sent in the MDL idle signal message; can be up to 38 characters.
•string generator string—Specifies the generator number string sent in the MDL test signal message; can be up to 38 characters.
|
Step 5
|
Example:
Router(config-controller)# exit
|
Exits controller configuration mode and returns to privileged EXEC mode.
|
How to Configure the Clear Channel T3/E3 with Integrated CSU/DSU Feature for an E3 Interface
The section describes the commands used to configure the Clear Channel T3/E3 with Integrated CSU/DSU feature for an E3 interface:
•Configuring the Card Type and Controller for an E3 Interface (required)
•Configuring Scrambling for E3 (required)
•Configuring the BERT for E3 (optional)
•Configuring Loopback for E3 (optional)
•Configuring National Bit for E3 (optional)
Configuring the Card Type and Controller for an E3 Interface
Perform this task to configure the card type and controller for a E3 interface.
Note The autoconfig/setup utility does not support configuring the card type for the T3/E3 network module.
SUMMARY STEPS
1. enable
2. configure terminal
3. card type e3 slot
4. controller e3 slot/port
5. framing {bypass | g751}
6. clock source {internal | line}
7. exit
DETAILED STEPS
| |
Command or Action
|
Purpose
|
Step 1
|
enable
Example:
Router> enable
|
Enables privileged EXEC mode.
•Enter your password if prompted.
|
Step 2
|
configure terminal
Example:
Router# configure terminal
|
Enters global configuration mode.
|
Step 3
|
card type e3 slot
Example:
Router(config)# card type e3 1
|
Selects the card type.
•Creates an E3 controller and a serial interface.
•e3—Specifies the E3 transmission scheme predominantly used in Europe.
•Provides 34010 kbps.
•slot—Slot number of the interface.
•By default, the E3 controller does not show up in the show running config output.
|
Step 4
|
controller e3 slot/port
Example:
Router(config)# controller e3 1
|
Specifies the E3 controller and enters controller configuration mode.
•slot/port—Backplane slot number and port number on the controller.
|
Step 5
|
framing {bypass | g751}
Example:
Router(config-controller)# framing bypass
|
Specifies the framing type.
•bypass—Specifies that the G.751 framing be bypassed.
•g751—Specifies G.751 as the E3 framing type.
•Default is g751.
|
Step 6
|
clock source {internal | line}
Example:
Router(config-controller)# clock source line
|
Selects the clock source.
•internal—Specifies that the internal clock source is used. This is the default for T3.
•line—Specifies that the network clock source is used. This is the default for E3.
|
Step 7
|
Example:
Router(config-controller)# exit
|
Exits controller configuration mode and returns to privileged EXEC mode.
|
Configuring DSU Mode and Bandwidth for E3
Perform this task to specify the interoperability mode used by an E3 controller.
SUMMARY STEPS
1. enable
2. configure terminal
3. interface serial slot/port
4. dsu mode {0 | 1}
5. dsu bandwidth kbps
6. exit
DETAILED STEPS
| |
Command
|
Purpose
|
Step 1
|
enable
Example:
Router> enable
|
Enables privileged EXEC mode.
•Enter your password if prompted.
|
Step 2
|
configure terminal
Example:
Router# configure terminal
|
Enters global configuration mode.
|
Step 3
|
interface serial slot/port
Example:
Router(config)# interface serial 1/1
|
Enters interface configuration mode and specifies the serial interface created on the controller.
|
Step 4
|
dsu mode {0 | 1}
Example:
Router(config-if)# dsu mode 0
|
Specifies the interoperability mode used by an E3 controller.
•0—Sets the interoperability mode to 0. This is the default. Specify mode 0 to connect an E3 controller to another E3 controller or to a Digital Link DSU (DL3100). Bandwidth range is from 358 to 24500/34010 kbps.
Note If the bandwidth is set to greater than 24500 kbps, it defaults to 34010 kbps.
•1—Sets the interoperability mode to 1. Specify mode 1 to connect an E3 controller to a Kentrox DSU. Bandwidth range is from 500 to 34010 kbps.
|
Step 5
|
dsu bandwidth kbps
Example:
Router(config-if)# dsu bandwidth 44210
|
Specifies the maximum allowable bandwidth in the range from 22 to 34010 kbps.
•The real (actual) vendor-supported bandwidth is in the range from 358 to 34010 kbps.
Note For the Cisco 2650XM and Cisco 2651XM platforms only, we recommend that you set the DSU bandwidth to 15000 in any subrate mode.
|
Step 6
|
Example:
Router(config-if)# exit
|
Exits interface configuration mode and returns to privileged EXEC mode.
|
Configuring Scrambling for E3
Perform this task to enable encryption of the payload on the E3 controller.
SUMMARY STEPS
1. enable
2. configure terminal
3. interface serial slot/port
4. scramble
5. exit
DETAILED STEPS
| |
Command
|
Purpose
|
Step 1
|
enable
Example:
Router> enable
|
Enables privileged EXEC mode.
•Enter your password if prompted.
|
Step 2
|
configure terminal
Example:
Router# configure terminal
|
Enters global configuration mode.
|
Step 3
|
interface serial slot/port
Example:
Router(config)# interface serial 1/1
|
Enters interface configuration mode.
|
Step 4
|
scramble
Example:
Router(config-if)# scramble
|
Enables the scrambling of the payload.
•Default is off.
|
Step 5
|
Example:
Router(config-if)# exit
|
Exits interface configuration mode and returns to privileged EXEC mode.
|
Configuring the BERT for E3
Perform this task to configure a BER test pattern on an E3 controller.
SUMMARY STEPS
1. enable
2. configure terminal
3. controller t3 slot/port
4. bert pattern {2^23 | 2^20 | 2^15 | 1s | 0s | alt-0-1}
5. no bert
6. exit
DETAILED STEPS
| |
Command
|
Purpose
|
Step 1
|
enable
Example:
Router> enable
|
Enables privileged EXEC mode.
•Enter your password if prompted.
|
Step 2
|
configure terminal
Example:
Router# configure terminal
|
Enters global configuration mode.
|
Step 3
|
controller e3 slot/port
Example:
Router(config)# controller e3 1/0
|
Selects the E3 controller and enters controller configuration mode.
•slot/port—Backplane slot number and port number on the controller.
|
Step 4
|
bert pattern {2^23 | 2^20 | 2^15 | 1s |
0s | alt-0-1}
Example:
Router(config-controller)# bert pattern
2^20
|
Configures a bit error rate test pattern.
•Acceptable values are:
–2^23—Pseudorandom 0.151 test pattern that is 8,388,607 bits in length.
–2^20—Pseudorandom 0.153 test pattern that is 1,048,575 bits in length.
–2^15—Pseudorandom 0.151 test pattern that is 32,768 bits in length.
–1s—Repeating pattern of ones (...111...).
–0s—Repeating pattern of zeros (...000...).
–alt-0-1—Repeating pattern of alternating zeros and ones (...01010...).
|
Step 5
|
no bert
Example:
Router(config-controller)# no bert
|
Disables the BERT test pattern.
|
Step 6
|
exit
Example:
Router(config-controller)# exit
|
Exits controller configuration mode and returns to privileged EXEC mode.
|
Configuring Loopback for E3
Perform this task to loop an entire E3 line toward the line and back toward the router.
SUMMARY STEPS
1. enable
2. configure terminal
3. controller e3 slot/port
4. loopback {local | network {line | payload}}
5. no loopback
6. exit
DETAILED STEPS
| |
Command
|
Purpose
|
Step 1
|
enable
Example:
Router> enable
|
Enables privileged EXEC mode.
•Enter your password if prompted.
|
Step 2
|
configure terminal
Example:
Router# configure terminal
|
Enters global configuration mode.
|
Step 3
|
controller e3 slot/port
Example:
Router(config)# controller e3 1/1
|
Selects the E3 controller and enters controller configuration mode.
•slot/port—Backplane slot number and port number on the controller.
|
Step 4
|
loopback {local | network {line |
payload}}
Example:
Router(config-controller)# loopback local
|
Loops the E3 line toward the line and back toward the router,
•local—Loops the data back toward the router and sends an AIS signal out toward the network.
•network {line | payload}—Sets the loopback toward the network before going through the framer (line) or after going through the framer (payload).
|
Step 5
|
no loopback
Example:
Router(config-controller)# no loopback
|
Removes the loop.
|
Step 6
|
Example:
Router(config-controller)# exit
|
Exits controller configuration mode and returns to privileged EXEC mode.
|
Configuring National Bit for E3
Perform this task to set the E3 national bit in the G.751 frame used by the E3 controller. This configuration is used to set the bit when the E3 line crosses national boundaries.
SUMMARY STEPS
1. enable
2. configure terminal
3. controller e3 slot/port
4. national bit {1 | 0}
5. exit
DETAILED STEPS
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Command
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Purpose
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Step 1
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enable
Example:
Router> enable
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Enables privileged EXEC mode.
•Enter your password if prompted.
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Step 2
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configure terminal
Example:
Router# configure terminal
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Enters global configuration mode.
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Step 3
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controller e3 slot/port
Example:
Router(config)# controller e3 1/1
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Selects the E3 controller and enters controller configuration mode.
•slot/port—Backplane slot number and port number on the controller.
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Step 4
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national bit {1 | 0}
Example:
Router(config-controller)# national bit 1
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Sets the E3 national bit in the G.751 frame used by the E3 controller.
•1 | 0—Specifies the E3 national bit in the G.751 frame.
•The default is 1.
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Step 5
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Example:
Router(config-controller)# exit
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Exits controller configuration mode and returns to privileged EXEC mode.
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Verifying the T3 or E3 Configuration
Perform this task to verify that the T3 or E3 controller is configured correctly. Enter the show running-config, show controllers, or show interfaces serial privileged EXEC command to display the command settings for the router.
Troubleshooting Tips
You can use the methods described in this section to troubleshoot the T3/E3 network module using Cisco IOS software.
Set Loopbacks
The T3/E3 local loopback can be used to ensure that the router and the T3/E3 network module are working properly. The controller clock source should be configured to "internal."
Use T3/E3 network loopback and remote loopback to diagnose problems with cables between the T3/E3 controller and the central switching office at the link level. For this diagnostic setup to work, if the network module is looped toward the network, the network module must be configured with the clock source as "line."
Run Bit Error Rate Test
The network module contains onboard BERT circuitry. With this circuitry present, the software can send and detect a programmable pattern that is compliant with CCITT/ITU pseudorandom and repetitive test patterns. BERT allows you to test cables and signal problems in the field.
When a BERT is running, your system expects to receive the same pattern that it is sending. To help ensure this, two common options are available.
•Use a loopback somewhere in the link or network.
•Configure remote testing equipment to send the same BERT pattern at the same time.
Please refer to the bert pattern (t3/e3) command in the "Command Reference" section for instructions on how to run BERT and check the results.
Use the show version Command
Use the show version command to learn if the router recognized the T3/E3 card and was able to initialize the card properly. The show version command lists the hardware interfaces and controllers present in the router. You should find "1 Subrate T3/E3 port(s)" as shown in the following example.
Router uptime is 2 hours, 6 minutes
System returned to ROM by power-on
System image file is "flash:c3725-i-mz"
cisco 3725 (R7000) processor (revision 0.4) with 111616K/19456K bytes of memory.
Processor board ID 12345678901
R7000 CPU at 240Mhz, Implementation 39, Rev 3.3, 256KB L2 Cache
X.25 software, Version 3.0.0
Primary Rate ISDN software, Version 1.1
2 FastEthernet/IEEE 802.3 interface(s)
1 Serial network interface(s)
2 Channelized T1/PRI port(s)
DRAM configuration is 64 bits wide with parity disabled.
55K bytes of non-volatile configuration memory.
15680K bytes of ATA System CompactFlas (Read/Write)
Configuration register is 0x0
Configuration Example for the Clear Channel T3/E3 with Integrated CSU/DSU Feature
The following is sample output from the show running-config command for an E3 controller:
Router# show running-config
Building configuration...
%AIM slot 0 doesn't exist
Current configuration :1509 bytes
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
voice call carrier capacity active
mta receive maximum-recipients 0
interface FastEthernet0/0
ip address 10.0.145.34 255.255.255.0
interface FastEthernet0/1
ip address 172.27.27.2 255.255.255.0
Additional References
The following sections provide additional references related to the Clear Channel T3/E3 with Integrated CSU/DSU feature:
•Related Documents
•Standards
•MIBs
•RFCs
Related Documents
Related Topic
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Document Title
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Basic information about configurations
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Cisco IOS Configuration Fundamentals Configuration Guide, Release 12.2
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Detailed information about configuring interfaces
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Cisco IOS Interface Configuration Guide, Release 12.2
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Detailed information about Cisco IOS commands
|
Cisco IOS Interface Command Reference, Release 12.2 T
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Detailed information about configuring voice, video, and fax applications
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Cisco IOS Voice, Video, and Fax Configuration Guide, Release 12.2
|
Detailed information about Cisco IOS commands
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Cisco IOS Voice, Video, and Fax Command Reference, Release 12.2 T
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Information on connecting network modules
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Connecting T3/E3 Network Modules, Release 12.2
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Standards
MIBs
MIBs
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MIBs Link
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•RFC 1407 MIB
•CISCO-ICSUDSU-MIB
|
To obtain lists of supported MIBs by platform and Cisco IOS release, and to download MIB modules, go to the Cisco MIB website on Cisco.com at the following URL:
http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml
|
To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:
http://tools.cisco.com/ITDIT/MIBS/servlet/index
If Cisco MIB Locator does not support the MIB information that you need, you can also obtain a list of supported MIBs and download MIBs from the Cisco MIBs page at the following URL:
http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml
To access Cisco MIB Locator, you must have an account on Cisco.com. If you have forgotten or lost your account information, send a blank e-mail to cco-locksmith@cisco.com. An automatic check will verify that your e-mail address is registered with Cisco.com. If the check is successful, account details with a new random password will be e-mailed to you. Qualified users can establish an account on Cisco.com by following the directions found at this URL:
http://www.cisco.com/register
RFCs
RFCs
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Title
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RFC 1407
|
Definitions of Managed Objects for the DS3/E3 Interface Type
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Technical Assistance
Description
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Link
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Technical Assistance Center (TAC) home page, containing 30,000 pages of searchable technical content, including links to products, technologies, solutions, technical tips, tools, and lots more. Registered Cisco.com users can log in from this page to access even more content.
|
http://www.cisco.com/public/support/tac/home.shtml
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Command Reference
The following modified commands are pertinent to this feature. To see the command pages for these commands and other commands used with this feature, go to the Cisco IOS Master Commands List, Release 12.4, at http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124mindx/
124index.htm.
•bert pattern (t3/e3)
•cablelength (t3)
•card type (t3/e3)
•clock source (t3/e3)
•controller e3
•dsu bandwidth (e3)
•dsu bandwidth (t3)
•dsu mode (e3)
•dsu mode (t3)
•framing (e3)
•framing (t3)
•loopback (e3)
•loopback (t3)
•mdl (t3)
•national bit (e3)
•scramble (t3/e3)
•show controllers (t3/e3)
Glossary
backplane—The physical connection between an interface processor or card and the data buses and the power distribution buses inside a chassis.
BER—bit error rate. Ratio of received bits that contain errors.
CSU—channel service unit. Digital interface device that connects end-user equipment to the local digital telephone loop. Often referred to together with DSU as CSU/DSU.
DS-3—digital signal level 3. Framing specification used for sending digital signals at 44.736 Mbps on a T3 facility.
DSU—data service unit. Device used in digital transmission that adapts the physical interface on a DTE device to a transmission facility, such as T1 or E1. The DSU also is responsible for such functions as signal timing. Often referred to together with CSU as CSU/DSU.
E3—Wide-area digital transmission scheme used predominantly in Europe that carries data at a rate of 34.368 Mbps. E3 lines can be leased for private use from common carriers.
FEAC—far-end alarm code.
Frame Relay— industry-standard, switched data link layer protocol that handles multiple virtual circuits using HDLC encapsulation between connected devices. Frame Relay is more efficient than X.25, the protocol for which it generally is considered a replacement.
HDLC—High-Level Data Link Control. Bit-oriented synchronous data link layer protocol developed by ISO. Derived from SDLC, HDLC specifies a data encapsulation method on synchronous serial links using frame characters and checksums.
MDL—Maintenance Data Link (MDL) message defined in the ANSI T1.107a-1990 specification. Also, the Cisco Message Definition Language—a high-level language used to specify protocols and protocol conversion operations on the VSC.
OIR—online insertion and removal. Feature that permits the addition, the replacement, or the removal of cards without interrupting the system power, entering console commands, or causing other software or interfaces to shut down.
PPP—Point-to-Point Protocol. Successor to SLIP that provides router-to-router and host-to-network connections over synchronous and asynchronous circuits. Whereas SLIP was designed to work with IP, PPP was designed to work with several network layer protocols, such as IP, IPX, and ARA. PPP also has built-in security mechanisms, such as CHAP and PAP. PPP relies on two protocols: LCP and NCP.
Subrate—Less than the standard rate of transmission, which is defined at the voice-grade rate of 64 kbps.
T3—Digital WAN carrier facility. T3 sends DS3-formatted data at 44.736 Mbps through the telephone switching network.
TDM—time-division multiplexing. Technique in which information from multiple channels can be allocated bandwidth on a single wire based on preassigned time slots. Bandwidth is allocated to each channel regardless of whether the station has data to send.
© 2005 Cisco Systems, Inc. All rights reserved.
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