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High-Density Extension Modules

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Connecting Cisco High-Density Extension Modules to the Network

Table Of Contents

Connecting Cisco High-Density Extension Modules to the Network

Cisco High-Density Analog and Digital Extension Module for Voice and Fax

Cisco High-Density Extension Module LEDs and Interfaces

Expansion Modules for Cisco High-Density Extension Modules

Installing Expansion Modules on Cisco High-Density Extension Modules

Connecting Cisco High-Density Extension Modules to the Network

Establishing Emergency or Power-Fail Connections

Cisco High-Density Extension Module Cable Pinouts

Related Documents

Obtaining Documentation, Obtaining Support, and Security Guidelines


Connecting Cisco High-Density Extension Modules to the Network


Revised: May 1, 2008, OL-12830-01

This guide describes how to connect Cisco high-density extension modules to your network. It contains the following sections:

Cisco High-Density Analog and Digital Extension Module for Voice and Fax

Installing Expansion Modules on Cisco High-Density Extension Modules

Connecting Cisco High-Density Extension Modules to the Network

Cisco High-Density Extension Module Cable Pinouts

Related Documents

Obtaining Documentation, Obtaining Support, and Security Guidelines

Cisco High-Density Analog and Digital Extension Module for Voice and Fax

The Cisco high-density analog and digital extension module for voice and fax is available as an 8-port analog voice module (EVM-HD-8FXS/DID). Each port can be configured in Foreign Exchange Station (FXS) or Direct Inward Dialing (DID) mode through Cisco IOS software commands.


Note FXS supports on-premises applications only.


Cisco high-density extension modules provide an integrated high-density analog and digital voice interface for small or medium branch offices. Together with certain expansion modules (see the "Expansion Modules for Cisco High-Density Extension Modules" section), the Cisco high-density extension module provides a maximum of 24 analog voice ports with 8 ports of DID capability.


Note Cisco high-density extension modules can only be used in certain slots of modular access routers. To determine which slots on your router support high-density extension modules, see the "Platform and Slot Limitations for Cisco Service Modules and Network Modules" section in Chapter  "Overview of Cisco Network Modules and Service Modules for Cisco Access Routers."



Caution To comply with the Telcordia GR-1089 NEBS standard for electromagnetic compatibility and safety, connect the 8-port analog voice/fax expansion module (EM-HDA-8FXS and EM3-HDA-8FXS) and 4-port digital voice/fax expansion module (EM-4BRI-NT/TE) only to intrabuilding or nonexposed wiring or cabling. The intrabuilding cable must be shielded and the shield must be grounded at both ends.

Cisco High-Density Extension Module LEDs and Interfaces

Figure 1 shows high-density extension module LEDs and interfaces.

Figure 1 Cisco High-Density Extension Module (EVM-HD-8FXS/DID) LEDs

1

EM0: Green indicates presence of an installed expansion module in slot EM0.

3

EN: Green indicates that the network module has passed self-test and is available to the router.

2

EM1: Green indicates presence of an installed expansion module in slot EM1.

4

RJ-21 connector for use with RJ-21 cable.


Expansion Modules for Cisco High-Density Extension Modules

The Cisco high-density extension module supports up to two expansion modules (EMs) in the configurations shown in Table 1.

Table 1 Example Hardware Configurations Supported on Cisco High-Density Extension Modules (EVM-HD-8FXS/DID)

Base Board
(FXS or DID)
EM0
EM1
Total Ports
Total Voice Sessions
FXS or DID
FXS
FXO
BRI
Ports
B-
channel

EVM-HD-
8FXS/DID

8

0

8

 

EM-HDA-8FXS

8

8

16

 

EM-HDA-8FXS

EM-HDA-8FXS

8

16

24

 

EM-HDA-8FXS

EM-HDA-3FXS/4FXO

8

11

4

23

 

EM-HDA-8FXS

EM-HDA-6FXO

8

8

6

22

 

EM-HDA-8FXS

EM-4BRI-NT/TE

8

8

4

8

24

 

EM3-HDA-8FXS/DID

EM3-HDA-8FXS/DID

16

8

24

 

EM3-HDA-8FXS/DID

EM-HDA-8FXS

16

8

24

 

EM3-HDA-8FXS/DID

EM-HDA-3FXS/4FXO

16

3

4

23

 

EM3-HDA-8FXS/DID

EM-HDA-6FXO

16

0

6

22

 

EM3-HDA-8FXS/DID

EM-4BRI-NT/TE

16

0

4

8

24

 

EM-HDA-3FXS/4FXO

8

3

4

15

 

EM-HDA-3FXS/4FXO

EM-HDA-3FXS/4FXO

8

6

8

22

 

EM-HDA-3FXS/4FXO

EM-HDA-6FXO

8

3

10

21

 

EM-HDA-3FXS/4FXO

EM-4BRI-NT/TE

8

3

4

4

8

23

 

EM-HDA-6FXO

8

6

14

 

EM-HDA-6FXO

EM-HDA-6FXO

8

12

20

 

EM-HDA-6FXO

EM-4BRI-NT/TE

8

6

4

8

22

 

EM-4BRI-NT/TE

8

4

8

16

 

EM-4BRI-NT/TE

EM-4BRI-NT/TE

8

8

16

24


The 4-port digital voice/fax expansion module (EM-4BRI-NT/TE) operates as an S/T interface and is capable of NT or TE functionality. In NT mode, the expansion module can supply in-line power for the far end of the connection.

The 7-port analog voice/fax expansion module (EM-HDA-3FXS/4FXO) provides three additional FXS ports and four FXO ports for off-premises analog voice applications.

The 6-port analog voice/fax expansion module (EM-HDA-6FXO) provides six FXO ports for off-premises analog voice applications. The sixth port (port 5) provides a trunk bypass (TBP) or power failover capability.

The 8-port analog voice/fax expansion module (EM-HDA-8FXS and EM3-HDA-8FXS) adds an additional eight FXS ports to the Cisco high-density extension module.


Tip When router power is off, connect an analog phone to the FXO line to make a call. (See the "Connecting Cisco High-Density Extension Modules to the Network" section for more information).



Note If you have specified the use of a private line automatic ringdown (PLAR) off-premises extension (OPX) connection mode for an FXO voice port (with loop resistance less than 8000 Ohm), you must ensure that the soft-offhook option is enabled on the port.

This option allows a stepped offhook resistance during seizure which avoids overloading the circuit during offhook in the event that ringing voltage is present on the circuit at the same time as the trunk seizure. The stepped offhook resistance is initially set to 800 Ohms, then adjusts to 50 Ohms when ringing voltage is not present.

To enable soft-offhook command on the port, and to access the connection command with plar opx syntax, see the Cisco Command Lookup Tool.


Installing Expansion Modules on Cisco High-Density Extension Modules

Expansion modules can be used to increase the number of ports supported on the high-density extension module.


Note ESD straps should be worn when handling all modules, including during installation of expansion modules. An ESD wrist strap is shipped with the product.


To install expansion modules, follow these steps:


Step 1 Decide if the expansion board is going in the EM0 slot or EM1 slot.


Note The EM0 slot is on the left, and the EM1 slot is on the right as you look at the face plate.


Step 2 Align the connectors on the underside of the expansion module with the connectors for the slot you plan to use on the network module. (See Figure 2.)

Step 3 Using gentle pressure, insert the connectors on the underside of the expansion module into the connectors on the network module.


Tip Use the alignment pins on the network module brackets to guide the expansion module during installation.



Note Press firmly on the expansion module until the board seats to ensure proper network connections.



Caution For each expansion module, two mounting screws must be installed with 6-8 lbs-in (67.8 N-cm) of torque. Failure to properly secure the expansion module to the base module with two screws compromises product reliability. In the case of FXO ports, failure to properly tighten both mounting screws causes FXO ground-start outgoing call operation to fail.

Step 4 Insert two screws from the hardware kit through the screw guides on the expansion module into the threaded holes on the network module brackets.

Figure 2 Installing an Expansion Module on Extension Module Slot EM1

1

Expansion module connector on the network module (for slot EM1).

2

Screw bracket on the network module faceplate (for slot EM1).


Step 5 Using a small flat-blade screwdriver, tighten the screws to secure the expansion module to the network module.


Warning Failure to secure the expansion module to the base module with two screws defeats the earth ground, causing a potential safety hazard. Statement 347

Tip To maintain proper seating of the network module, tighten the rear screw first.


Step 6 Apply the appropriate label on the front of the network module faceplate. (See Figure 3.)

Figure 3 Label Locations for Expansion Modules on Cisco High-Density Expansion Modules

Step 7 Install the network module into the router. (See the "Installing Cisco Network Modules and Service Modules in Cisco Access Routers" section.)


Connecting Cisco High-Density Extension Modules to the Network

The Cisco high-density extension module is connected to a distribution frame or patch panel with an RJ-21 cable. (See Figure 4.) RJ-21 cables are not provided with the network module.


Warning Do not work on the system or connect or disconnect cables during periods of lightning activity. Statement 1001

Caution To comply with the Telcordia GR-1089 NEBS standard for electromagnetic compatibility and safety, connect the 8-port analog voice/fax expansion module (EM-HDA-8FXS and EM3-HDA-8FXS) and 4-port digital voice/fax expansion module (EM-4BRI-NT/TE) only to intrabuilding or nonexposed wiring or cabling. The intrabuilding cable must be shielded and the shield must be grounded at both ends.

Figure 4 Connecting Cisco High-Density Extension Modules (EVM-HD-8FXS/DID) to a Main Distribution Frame or Patch Panel

1

Strap to secure connector

4

Main distribution frame

2

RJ-21 connector

5

PBX

3

Public switched telephone network

   

Distribution panels are generally available from multiple cable and network adapter vendors. Customers may, at their sole discretion, consider using a patch panel from Black Box Corporation (JPM2194A—see Figure 5). (Mention of products or services other than Cisco products or services is for information purposes only and constitutes neither an endorsement nor a recommendation.) The Black Box patch panel accommodates RJ-11 and RJ-45 combinations possible on Cisco high-density expansion modules, and offers flexibility for expansion module upgrades (either analog or digital). For ordering information, see the Cisco High-Density Extension Module data sheet.

Figure 5 Black Box Patch Panel (JPM2194A) for Use with Cisco High-Density Expansion Modules

1

RJ-11 receptacles for FXS/DID ports on the EVM-HD-8FXS/DID baseboard.

4

RJ-45 receptacles for BRI ports on the EM-4BRI-NT/TE when installed in slot EM0.

2

RJ-11 receptacles for FXS/DID ports on the EVM-HD-8FXS/DID baseboard.

5

RJ-11 receptacles for FXS or FXO ports on an FXS or FXO expansion module when installed in slot EM1.

Note Applies to EM-HDA-8FXS, EM3-HDA-8FXS, EM-HDA-6FXO, or EM-HDA-3FXS/4FXO expansion modules only.

3

RJ-11 receptacles for FXS or FXO ports on an FXS or FXO expansion module when installed in slot EM0.

Note Applies to EM-HDA-8FXS, EM3-HDA-8FXS, EM-HDA-6FXO, or EM-HDA-3FXS/4FXO expansion modules only.

6

RJ-45 receptacles for BRI ports on the EM-4BRI-NT/TE when installed in slot EM1.


Table 2 provides pin definitions for the RJ-11 and RJ-45 receptacle types:

Table 2 Pinouts for RJ-11 and RJ-45 Receptacle Types

Receptacle Type
Pin Definitions

RJ-11

Pin 3 = Ring

Pin 4 = Tip

RJ-45

Pin 3 = ISDN BRI-S/T Bus Transmit+

Pin 4 = ISDN BRI-S/T Bus Receive+

Pin 5 = ISDN BRI-S/T Bus Receive-

Pin 6 = ISDN BRI-S/T Bus Transmit-


Establishing Emergency or Power-Fail Connections

During power failures or when router power is off, emergency voice connections can be made through power-fail ports on the EM-HDA-6FXO expansion module. The expansion module must be properly installed on the Cisco high-density extension module. (See the "Installing Expansion Modules on Cisco High-Density Extension Modules" section.)

To provide an emergency connection, connect an analog phone using the port information listed in Table 3.


Note There will not be a dial tone on port 15 or port 23 until the router is powered down.


Table 3 Establishing Emergency Connections through Cisco High-Density Extension Modules

Expansion Module Slot
Analog Phone Port
PSTN Port

EM0

Port 15 Tip/Ring

Port 13 Tip/Ring

EM1

Port 23 Tip/Ring

Port 21 Tip/Ring



Caution Analog phones connected to the power-fail ports should not be connected in parallel to a normal FXS port on Cisco high-density extension modules. The protection circuit on the FXS port can interfere with phone operation when router power is off.

Cisco High-Density Extension Module Cable Pinouts

Figure 6 shows the RJ-21 connector wiring for the cable used for the high-density extension module, and Table 4 lists cable pinouts. Port usage depends on the type of installed expansion module.

Figure 6 Close-Up of the RJ-21 Connector Pinout for Cisco High-Density Extension Modules (EVM-HD-8FXS/DID)

Table 4 RJ-21 Connections for the Cisco High-Density Extension Module 

RJ-21Pin
Hardware Component
Base Card Ports
Expansion Module Ports
8FXS/DID
EM-HDA-8FXS/EM3-HDA-8FXS
EM-HDA-3FXS/4FXO
EM-HDA-6FXO
EM-4BRI-NT/TE

26

Base card (EVM-HD-8FXS

Port 0 Tip

1

Port 0 Ring

27

Port 1 Tip

2

Port 1 Ring

28

Port 2 Tip

3

Port 2 Ring

29

Port 3 Tip

4

Port 3 Ring

30

Port 4 Tip

5

Port 4 Ring

31

Port 5 Tip

6

Port 5 Ring

32

Port 6 Tip

7

Port 6 Ring

33

Port 7 Tip

8

Port 7 Ring

34

EM0

Port 8 Tip

FXS Port 8 Tip

Port 8 Tip

Port x/0 SX-

9

Port 8 Ring

FXS Port 8 Ring

Port 8 Ring

Port x/0 SX+

35

Port 9 Tip

FXS Port 9 Tip

Port 9 Tip

Port x/0 SR-

10

Port 9 Ring

FXS Port 9 Ring

Port 9 Ring

Port x/0 SR+

36

Port 10 Tip

FXS Port 10 Tip

Port 10 Tip

Port x/1 SX-

11

Port 10 Ring

FXS Port 10 Ring

Port 10 Ring

Port x/1 SX+

37

Port 11 Tip

Unused

Port 11 Tip

Port x/1 SR-

12

Port 11 Ring

Unused

Port 11 Ring

Port x/1 SR+

38

Port 12 Tip

FXO Port 12 Tip

Port 12 Tip

Port x/2 SX-

13

Port 12 Ring

FXO Port 12 Ring

Port 12 Ring

Port x/2 SX+

39

Port 13 Tip

FXO Port 13 Tip

Port 13 Tip

Port x/2 SR-

14

Port 13 Ring

FXO Port 13 Ring

Port 13 Ring

Port x/2 SR+

40

Port 14 Tip

FXO Port 14 Tip

Unused

Port x/3 SX-

15

Port 14 Ring

FXO Port 14 Ring

Unused

Port x/3 SX+

41

Port 15 Tip

FXO Port 15 Tip

PFP1 Tip

Port x/3 SR-

16

Port 15 Ring

FXO Port 15 Ring

PFP Ring

Port x/3 SR+

42

EM1

Port 16 Tip

FXS Port 16 Tip

Port 16 Tip

Port x/4 SX-

17

Port 16 Ring

FXS Port 16 Ring

Port 16 Ring

Port x/4 SX+

43

Port 17 Tip

FXS Port 17 Tip

Port 17 Tip

Port x/4 SR-

18

Port 17 Ring

FXS Port 17 Ring

Port 17 Ring

Port x/4 SR+

44

Port 18 Tip

FXS Port 18 Tip

Port 18 Tip

Port x/5 SX-

19

Port 18 Ring

FXS Port 18 Ring

Port 18 Ring

Port x/5 SX+

45

Port 19 Tip

Unused

Port 19 Tip

Port x/5 SR-

20

Port 19 Ring

Unused

Port 19 Ring

Port x/5 SR+

46

Port 20 Tip

FXO Port 20 Tip

Port 20 Tip

Port x/6 SX-

21

Port 20 Ring

FXO Port 20 Ring

Port 20 Ring

Port x/6 SX+

47

Port 21 Tip

FXO Port 21 Tip

Port 21 Tip

Port x/6 SR-

22

Port 21 Ring

FXO Port 21 Ring

Port 21 Ring

Port x/6 SR+

48

Port 22 Tip

FXO Port 22 Tip

Unused

Port x/7 SX-

23

Port 22 Ring

FXO Port 22 Ring

Unused

Port x/7 SX+

49

Port 23 Tip

FXO Port 23 Tip

PFP Tip

Port x/7 SR-

24

Port 23 Ring

FXO Port 23 Ring

PFP Ring

Port x/7 SR+

50

Unused

Unused

Unused

Unused

25

Unused

Unused

Unused

Unused

1 During power failures or when router power is off, emergency voice connections can be made through power-fail ports (PFP) on the EM-HDA-6FXO expansion module.



Note If there is only one EM-4BRI-NT/TE and it is installed in EM1, number the ports x/0 through x/3.


Related Documents

For additional information, see the following documents and resources.

Related Topic
Document Title

Regulatory compliance and safety information

Cisco Network Modules and Interface Cards Regulatory Compliance and Safety Information
http://www.cisco.com/en/US/docs/routers/access/interfaces/rcsi/IOHrcsi.html

Cisco IOS software website and reference documentation

Cisco IOS Software http://www.cisco.com/web/psa/products/index.html?c=268438303


Obtaining Documentation, Obtaining Support, and Security Guidelines

For information on obtaining documentation, obtaining support, providing documentation feedback, security guidelines, and also recommended aliases and general Cisco documents, see the monthly What's New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at:

http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html