PA-MC-2T3+ Multichannel T3 Port Adapter Installation and Configuration
Overview: PA-MC-2T3+ Multi-Channel T3 Port Adapter Installation and Configuration
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Table Of Contents

Overview

Port Adapter Overview

Channelized T3 Overview

Unchannelized T3 Overview

T3 Specifications

Unchannelized Interoperability Guidelines for DSUs

LEDs

Port Adapter Slot Locations on the Supported Platforms

Cisco 7200 Series Routers Slot Numbering

Cisco 7200 VXR Router with the Port Adapter Jacket Card Slot Numbering

Cisco 7301 Router Slot Numbering

Cisco 7304 PCI Port Adapter Carrier Card Slot Numbering

Cisco 7401ASR Router Slot Numbering

VIP Slot Numbering

Identifying Interface Addresses

Cisco 7200 Series Routers Interface Addresses

Cisco 7301 Router Interface Addresses

Cisco 7304 PCI Port Adapter Carrier Card Interface Addresses

Cisco 7401ASR Router Interface Addresses

VIP Interface Addresses


Overview


This chapter describes the Cisco PA-MC-2T3+ port adapter and contains the following sections:

Port Adapter Overview

Channelized T3 Overview

Unchannelized T3 Overview

T3 Specifications

LEDs

Port Adapter Slot Locations on the Supported Platforms

Identifying Interface Addresses

Port Adapter Overview

The PA-MC-2T3+ is a single-width port adapter that provides two T3 interface connections using BNC connectors. (See Figure 1-1.) Each T3 interface can be independently configured to be either channelized or unchannelized. A channelized T3 provides 28 T1 lines multiplexed into the T3. Each T1 line can be configured into one or more serial interface data channels.

An unchannelized T3 provides a single serial interface data channel that may be configured to use all of the T3 bandwidth or a fractional portion of it. This mode is compatible with several vendors of fractional (subrate) DS3 data service units (DSUs).

Figure 1-1 PA-MC-2T3+—Front Panel

The PA-MC-2T3+ has the following features and physical characteristics:

The PA-MC-2T3+ supports both channelized and unchannelized operations.

It transmits and receives data bidirectionally at the T3 rate of 44.736 Mbps.

It conforms to relevant specifications for DS3 (Digital Signal Level 3) circuits.

The T3 connection, provided by two female BNC connectors for transmit (TX) and receive (RX), requires 734A coaxial cable that has an impedance of 75 ohms.

It supports RFC 1406 and RFC 1407 (CISCO-RFC-1407-CAPABILITY.my). For RFC 1406, Cisco supports all tables except the FarEnd table. For RFC 1407, Cisco does not support FarEnd or Fractional tables. (For information on accessing Cisco MIB files, refer to the Cisco MIB User Quick Reference publication.)

PA-MC-2T3+ microcode is loaded at initialization and is bundled into IOS software.

Channelized T3 Overview

In the channelized mode of operation, a PA-MC-2T3+ T3 link is channelized into 28 DS1 data lines in an industry standard multiplexing format.

Each of the T1 lines contains 24 timeslots of 64 or 56 kbps each. The T1 lines can support one or more user data channels which appear to the system as serial interfaces. Each serial interface is assigned one or more of the timeslots giving the serial interface a bandwidth of n x 56 kbps or n x 64 kbps, where n is the number of timeslots assigned. Any unused timeslots of the T1 are filled with an idle channel pattern.

The following restrictions apply: A timeslot can only be used by one serial interface. A serial interface cannot use timeslots from more than one T1 line. Each T3 can have a maximum of 128 serial interfaces. Unused serial interfaces on one T3 cannot be used by the other T3.

The PA-MC-2T3+ supports Cisco High-Level Data Link Control (HDLC), Frame Relay, PPP, and Switched Multimegabit Data Service (SMDS) Data Exchange Interface (DXI) encapsulations over each serial interface.


Note T1 lines on the PA-MC-2T3+ are numbered 1-28, rather than the more traditional zero-based scheme (0-27) used with other Cisco products. This is to ensure consistency with telco numbering schemes for T1 lines within channelized T3 equipment.



Note The PA-MC-2T3+ does not support the aggregation of multiple T1 lines (called inverse multiplexing or bonding) in hardware for higher bandwidth data rates. MLPPP may be used for this purpose in software.


The T3 section of the PA-MC-2T3+ supports the maintenance data-link channel (MDL) when using c-bit parity framing as well as local and network loopbacks. The T1 section of the PA-MC-2T3+ supports facilities data link (FDL) in Extended Superframe (ESF) framing, as well as various loopbacks. Bit error rate testing (BERT) is supported on each of the T1 lines although a test may not be active on more than one T1 at a time. BER testing may be done over a framed or unframed T1 signal.

Unchannelized T3 Overview

In the unchannelized mode of operation, a T3 link provides a single high speed user data channel, rather than being multiplexed into 28 T1 lines. The data channel appears to the system as a serial interface that may be configured to use the full T3 bandwidth or a smaller portion of the T3 bandwidth. No industry standard exists for subdividing the T3 bandwidth but the PA-MC-2T3+ is compatible with the proprietary formats of five vendors of T3 DSUs, when used at the far end of the T3 link.

In unchannelized T3 mode, the T3 section supports the maintenance data link (MDL) channel when using c-bit parity framing as well as local and network loopbacks. Bit error rate testing (BERT) is supported on the T3 link. The PA-MC-2T3+ supports Cisco High-Level Data Link Control (HDLC), Frame Relay, PPP, and Switched Multimegabit Data Service (SMDS) Data Exchange Interface (DXI) encapsulations over the serial interface.

T3 Specifications

The PA-MC-2T3+ T3 port is designed to receive and transmit at the DSX-3 level while driving and receiving from 75-ohm coaxial cables (ATT 734A or equivalent quality coax). The T3 port connects directly to any equipment with DSX-3 level BNC connectors.

Table 1-1 lists the specifications that the T3 front end is designed to meet.

Table 1-1 Specifications for the T3 Front End

Parameter
Specification

Line rate

44.736 Mbps (±20 ppm)

Line code

B3ZS (bipolar with three-zero substitution)

Impedance

75 ohms

Output Pulse shape

ANSI T1.102, pulse amplitude is between 0.36 and 0.85 volts peak

Input signal

0.035-1.1 volts peak

Output signal

Able to drive 450 feet (135 meters) of 75-ohm coaxial cable (734A or equivalent) and meet pulse shape template



Note The coax shield side of the T3 BNC connectors is connected to the router chassis ground.


Unchannelized Interoperability Guidelines for DSUs

The PA-MC-2T3+ supports several types of integrated data service units (DSUs). Table 1-2 lists the feature compatibilities of PA-MC-2T3+ DSUs.

Table 1-2 Feature Compatibilities of PA-MC-2T3+ DSUs 

Vendor
DSU Model
Full Rate Support
Scrambling Support
Subrate Support

Digital Link

DL3100

Yes

Yes

Yes

ADC Kentrox

T3/E3 IDSU

Yes

Yes

Yes

Larscom

Access T45

Yes

Yes

Yes

Adtran

T3SU 300

Yes

Yes

Yes

Verilink

HDM2182

Yes

Yes

Yes



Note The PA-MC-2T3+ does not support configuration of the far end T3 DSU using the maintenance data link channel in c-bit parity framing.


LEDs

The PA-MC-2T3+ has seven status LEDs located on its faceplate: ENABLED, ALARM, LOOP, LOS, OOF, AIS, and FERF. (These status LEDs are shown from left to right in Figure 1-2.)

Figure 1-2 PA-MC-2T3+ Status LEDs—Partial Horizontal View

After system initialization, the green ENABLED LED indicates that the port adapter is enabled for operation.

The following conditions must be met before the PA-MC-2T3+ is enabled:

The port adapter is correctly installed in the VIP motherboard or Cisco 7200 series router slot and is receiving power.

The system software recognizes the PA-MC-2T3+

If either one of the preceding conditions is not met, or if the initialization fails for other reasons, the enabled LED does not go on.

Table 1-3 lists LED colors and indications.

Table 1-3 PA-MC-2T3+ LEDs 

LED Label
Color
State
Meaning

ALARM

Yellow

On

T1 loss of frame (LOF)
T1 alarm indication signal (AIS)
T3 loss of signal (LOS)
T3 alarm indication signal (AIS)
T3 out of frame (OOF)
T3 far-end received failure (FERF)

LOOP

Yellow

On

T1 line or T3 link in a loopback state; not enabled for normal data traffic

LOS

Yellow

On

T3 link loss of the received signal.
Operates in conjunction with ALARM LED.

AIS

Yellow

On

T3 link receives alarm indication signal.
Operates in conjunction with the ALARM LED.

OOF

Yellow

On

Indicates a DS3 out-of-frame (OOF) condition. Operates in conjunction with the ALARM LED.

FERF

Yellow

On

Receiver detects a far end receive failure (FERF) signal from the far end. Operates in conjunction with the ALARM LED.


In addition to the interface status information provided by the LEDs, you can also retrieve detailed interface status information either through the router console port or through Telnet or Simple Network Management Protocol (SNMP).

Port Adapter Slot Locations on the Supported Platforms

This section discusses port adapter slot locations on the supported platforms. The illustrations that follow summarize slot location conventions on each platform:

Cisco 7200 Series Routers Slot Numbering

Cisco 7301 Router Slot Numbering

Cisco 7304 PCI Port Adapter Carrier Card Slot Numbering

Cisco 7401ASR Router Slot Numbering

VIP Slot Numbering

Cisco 7200 Series Routers Slot Numbering

Figure 1-4 shows a Cisco 7206 with port adapters installed. In the Cisco 7206 (including the Cisco 7206 and Cisco 7206VXR as router shelves in a Cisco AS5800 Universal Access Server), port adapter slot 1 is in the lower left position, and port adapter slot 6 is in the upper right position. (The Cisco 7202 and Cisco 7204 are not shown; however, the PA-MC-2T3+ can be installed in any available port adapter slot 1 through 6.)

Cisco 7200 VXR Router with the Port Adapter Jacket Card Slot Numbering

Figure 1-3 Port Adapter Slots in Cisco 7206 VXR Router with the Port Adapter Jacket Card

1

Slot 5

5

Slot 6

2

Slot 3

6

Slot 4

3

Slot 1

7

Slot 2

4

Slot 7-port adapter (slot 0-Jacket Card)

   

Table 1-3 shows the slot number of port adapters in a Cisco 7200 VXR router with the Port Adapter Jacket Card installed. Port adapter slots in the Cisco 7200 VXR routers are numbered from left to right. With an NPE-G1 or NPE-G2 installed, port adapter slot 0 can accept the Port Adapter Jacket Card. The Port Adapter Jacket Card resides in port adapter slot 0. The port adapter in the Port Adapter jacket card resides in port adapter slot 5 on the Cisco 7204 VXR router, or port adapter slot 7 on the Cisco 7206 VXR router.

Figure 1-4 Port Adapter Slots in the Cisco 7206

Cisco 7301 Router Slot Numbering

Figure 1-5 shows the front view of a Cisco 7301 router with a port adapter installed. The Cisco 7301 router has one standard port adapter slot.

Figure 1-5 Port Adapter Slot in the Cisco 7301 Router

Cisco 7304 PCI Port Adapter Carrier Card Slot Numbering

The Cisco 7304 PCI Port Adapter Carrier Card accepts one single-width port adapter. Figure 1-6 shows a Cisco 7304 PCI Port Adapter Carrier Card with a port adapter installed.

Figure 1-6 Cisco 7304 PCI Port Adapter Carrier Card—Port Adapter Installed

The Cisco 7304 PCI Port Adapter Carrier Card installs in Cisco 7304 router module slots 2 through 5. See Figure 1-7 for module slot numbering on a Cisco 7304 router.

Figure 1-7 Module Slots on the Cisco 7304 Router

Cisco 7401ASR Router Slot Numbering

Figure 1-8 shows the front view of a Cisco 7401ASR router with a port adapter installed. There is only one port adapter slot in a Cisco 7401ASR router.

Figure 1-8 Port Adapter Slot in the Cisco 7401ASR Router

VIP Slot Numbering

Figure 1-9 shows a partial view of a VIP motherboard with installed port adapters. With the motherboard oriented as shown in Figure 1-9, the left port adapter is in port adapter slot 0, and the right port adapter is in port adapter slot 1.

Figure 1-9 VIP Motherboard with Two Port Adapters Installed—Horizontal Orientation


Note In the Cisco 7000, Cisco 7507, and Cisco 7513 chassis, the VIP motherboard is installed vertically. In the Cisco 7010 and Cisco 7505 chassis, the VIP motherboard is installed horizontally.


Interface processor slots are numbered as shown in Figure 1-10.

Figure 1-10 Interface Slot Numbers—Cisco 7505 Shown

Identifying Interface Addresses

This section describes how to identify interface addresses for the PA-MC-2T3+ in supported platforms. Interface addresses specify the actual physical location of each interface on a router or switch.

Interfaces on the PA-MC-2T3+ installed in a router maintain the same address regardless of whether other port adapters are installed or removed. However, when you move a port adapter to a different slot, the first number in the interface address changes to reflect the new port adapter slot number.

Interfaces on a PA-MC-2T3+ installed in a VIP maintain the same address regardless of whether other interface processors are installed or removed. However, when you move a VIP to a different slot, the interface processor slot number changes to reflect the new interface processor slot.


Note Interface ports are numbered from left to right starting with 0.


Table 1-4 explains how to identify interface addresses.

Table 1-4 Identifying Interface Addresses 

Platform
Interface Address Format
Numbers
Syntax

Cisco 7120 series routers

Port-adapter-slot-number/interface-port-number

Port adapter slot—always 3

Interface port—0 and 1

3/1

Cisco 7140 series routers

Port-adapter-slot-number/interface-port-number

Port adapter slot—always 4

Interface port—0 and 1

4/0

Cisco 7200 series routers

Port-adapter-slot-number/interface-port-number

Port adapter slot—0 through 6 (depends on the number of slots in the router)1

Interface port—0 and 1

1/0

Port Adapter Jacket Card with the Cisco 7200 VXR router2

Port-adapter-slot-number/interface-port-number

Port adapter slot—0 through 7 (depends on the number of slots in the router)3

Interface port—0 and 1

1/0

Cisco 7301 routers

Port-adapter-slot-number/interface-port-number

Port adapter slot—always 1

Interface port—0 and 1

1/0

Cisco 7304 PCI Port Adapter Carrier Card in Cisco 7304 routers

Port-adapter-slot-number/interface-port-number

Port adapter slot—router module slot 2 through 5

Interface port—0 and 1

3/0

Cisco 7401ASR routers

Port-adapter-slot-number/interface-port-number

Port adapter slot—always 1

Interface port—0 and 1

1/0

VIP in Cisco 7000 series or
Cisco 7500 series routers

Interface-processor-slot-number/port-adapter-slot-
number/interface-port-number

Interface processor slot—0 through 12 (depends on the number of slots in the router)

Port adapter slot—always 0 or 1

Interface port—0 and 1

3/1/0

1 Port adapter slot 0 is reserved for the Fast Ethernet port on the I/O controller (if present).

2 Port adapter slot 0 can accept the Port Adapter Jacket Card if an NPE-G1 or NPE-G2 are installed.

3 Port adapter slot 0 is reserved for the Fast Ethernet port on the I/O controller (if present).


Cisco 7200 Series Routers Interface Addresses

This section describes how to identify the interface addresses used for the PA-MC-2T3+ in Cisco 7200 series routers. The interface address is composed of a two-part number in the format port-adapter-slot-number/interface-port-number. See Table 1-4 for the interface address format.

In Cisco 7200 series routers, port adapter slots are numbered from the lower left to the upper right, beginning with port adapter slot 1 and continuing through port adapter slot 2 for the Cisco 7202, slot 4 for the Cisco 7204 and Cisco 7204VXR, and slot 6 for the Cisco 7206 and Cisco 7206VXR. (Port adapter slot 0 is reserved for the optional Fast Ethernet port on the I/O controller—if present.)

The interface addresses of the interfaces on the PA-MC-2T3+ in port adapter slot 1 are 1/0 through 1/1 (port adapter slot 1 and interfaces 0 and 1). If the PA-MC-2T3+ was in port adapter slot 4, these same interfaces would be numbered 4/0 through 4/1 (port adapter slot 4 and interfaces 0 and 1).

Cisco 7301 Router Interface Addresses

This section describes how to identify addresses used for the PA-MC-2T3+ in the Cisco 7301 router. In the Cisco 7301 router, slot 1 is the port adapter slot you use for the PA-MC-2T3+. (See Figure 1-5.)

The interface address is composed of a two-part number in the format port-adapter-slot-number/interface-port-number. See Table 1-4 for the interface address format.

Cisco 7304 PCI Port Adapter Carrier Card Interface Addresses

This section describes how to identify the interface addresses used for the PA-MC-2T3+ in the Cisco 7304 PCI Port Adapter Carrier Card in Cisco 7304 routers. The interface address is made of a two-part number in the format port-adapter-slot-number/interface-port-number.

The Cisco 7304 PCI Port Adapter Carrier Card installs into Cisco 7304 router module slots 2 through 5 (See Figure 1-7.) The port-adapter-slot-number is the Cisco 7304 router module slot number. For example, the interface address of port 0 on a PA-MC-2T3+, in which the Cisco 7304 PCI Port Adapter Carrier Card is installed in Cisco 7304 router module slot 3, would be numbered 3/0.

Cisco 7401ASR Router Interface Addresses

This section describes how to identify addresses used for the PA-MC-2T3+ in the Cisco 7401ASR router. In the Cisco 7401ASR router, slot 1 is the port adapter slot you use for the PA-MC-2T3+.
(See Figure 1-8.) The interface address is composed of a two-part number in the format port-adapter-slot-number/interface-port-number. See Table 1-4 for the interface address format.

VIP Interface Addresses

This section describes how to identify the interface addresses used for the PA-MC-2T3+ on a VIP in Cisco 7000 series and Cisco 7500 series routers.


Note Although the processor slots in the 7-slot Cisco 7000 and Cisco 7507 and the 13-slot Cisco 7513 and Cisco 7576 are vertically oriented and those in the 5-slot Cisco 7010 and Cisco 7505 are horizontally oriented, all Cisco 7000 series and Cisco 7500 series routers use the same method for slot and port numbering.


See Table 1-4 for the interface address format. The interface address is composed of a three-part number in the format interface-processor-slot-number/port-adapter-slot-number/interface-port-number.

If the VIP is inserted in interface processor slot 3, then the interface addresses of the PA-MC-2T3+ are 3/1/0 through 3/1/1 (interface processor slot 3, port adapter slot 1, and interfaces 0 and 1). If the port adapter was in port adapter slot 0 on the VIP, these same interface addresses would be numbered 3/0/0 through 3/0/1.


Note If you remove the VIP with the PA-MC-2T3+ (shown in Figure 1-9) from interface processor slot 3 and install it in interface processor slot 2, the interface addresses become 2/1/0 through 2/1/1.