Cisco Systems OL-12811-01 User Manual
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Connecting Cisco ISDN PRI Network Modules to the Network

Revised: May 1, 2008, OL-12811-01

This guide describes how to connect Cisco Integrated Services Digital Network (ISDN) Primary Rate Interface (PRI) network modules to your network. It contains the following sections:

Channelized T1/E1 PRI Network Modules with G.703, page 2

Channelized T1/ISDN PRI Network Modules, page 5

Channelized T1/ISDN PRI with CSU Network Modules, page 6

Channelized E1/ISDN PRI Balanced (120-Ohm) Network Modules, page 7

Channelized E1/ISDN PRI Unbalanced (75-Ohm) Network Modules, page 10

PRI Module LEDs, page 11

Online Insertion and Removal with a Cisco PRI Network Module (Cisco 3660 and Cisco 3745 Only), page 14

Upgrading ISDN PRI Network Modules, page 15

Related Documents, page 15

Obtaining Documentation, Obtaining Support, and Security Guidelines, page 16

Note Unless specifically identified, references to PRI modules in this chapter include all these network modules.

Note Do not install an ISDN BRI network module in the same chassis as an ISDN PRI network module, unless you are using Cisco IOS Release 11.3(3)T or later. Earlier Cisco IOS releases do not support this configuration.

CT1/PRI modules are available with or without a built-inchannel service unit (CSU), and with one or two ports. CT1/PRI modules connect to an external CSU;CT1/PRI-CSUmodules connect directly to the network. Each T1 module provides up to 24 virtual channels per T1 port. Each channel can be configured individually as a serial interface.

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Connecting Cisco ISDN PRI Network Modules to the Network

Channelized T1/E1 PRI Network Modules with G.703

CT1/PRI and CT1/PRI-CSUmodules receive and transmit data bidirectionally, at the T1 rate of 1.544 Mbps.

Channelized T1/E1 PRI Network Modules with G.703

This section provides information about the following network modules:

1-portT1/E1 channelized PRI network module with G.703(NM-1CE1T1-PRI)(seeFigure 1)

2-portT1/E1 channelized PRI network module with G.703(NM-2CE1T1-PRI)(seeFigure 2)

Cisco T1/E1 channelized PRI network modules with G.703 provide connection of one or two primary rate ISDN lines. T1 or E1 interfaces are configurable through Cisco IOS command-lineinterface (CLI) commands. Each port supports100/120-ohmbalanced and75-ohmunbalanced termination, and featuresRJ-48Cconnectors and cable accessories allowing forDB-15,BNC, and other connector types. An onboard advanced integration module (AIM) connector allows for future universal port AIM support.

Caution To comply with the TelcordiaGR-1089NEBS standard for electromagnetic compatibility and safety, connect the1-portT1/E1 channelized PRI network modules with G.703(NM-1CE1T1-PRI)and2-portT1/E1 channelized PRI network modules with G.703(NM-2CE1T1-PRI)only to intrabuilding or nonexposed wiring or cabling. The intrabuilding cable must be shielded and the shield must be grounded at both ends.

Cisco T1/E1 channelized PRI network modules with G.703 (NM-1CE1T1-PRIandNM-2CE1T1-PRI)replace the following network modules (also described in this chapter):

NM-1CE1B

NM-1CE1U

NM-1CT1

NM-1CT1-CSU

NM-2CE1B

NM-2CE1U

NM-2CT1

NM-2CT1-CSU

For information on Cisco modular access routers supporting Cisco channelized T1/E1 PRI network modules with G.703, see Table 1.

Table 1

Modular Access Routers Supporting Cisco Channelized T1/E1 PRI Network Modules

 

with G.703

 

 

 

 

 

Modular Access Router

NM-1CE1T1-PRI

NM-2CE1T1-PRI

 

 

 

 

 

Cisco 26xx

 

No

No

 

 

 

 

 

Cisco 26xxXM

 

Yes

Yes

 

 

 

 

 

Cisco 2691

 

Yes

Yes

 

 

 

 

 

Cisco 3620

 

No

No

 

 

 

 

 

Cisco 3631

 

Yes

Yes

 

 

 

 

 

Cisco 3640

 

No

No

 

 

 

 

 

Connecting Cisco ISDN PRI Network Modules to the Network

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Connecting Cisco ISDN PRI Network Modules to the Network

Channelized T1/E1 PRI Network Modules with G.703

Table 1

Modular Access Routers Supporting Cisco Channelized T1/E1 PRI Network Modules

 

with G.703

 

 

 

 

 

Modular Access Router

NM-1CE1T1-PRI

NM-2CE1T1-PRI

 

 

 

 

 

Cisco 3660

 

Yes

Yes

 

 

 

 

 

Cisco 37xx

 

Yes

Yes

 

 

 

 

 

Figure 1 andFigure 2 show the faceplates for the1-portand2-portchannelized T1/E1 PRI network modules with G.703.

Figure 1

1-PortChannelized T1/E1 PRI Network Module with G.703

 

NM-1CE1T1-PRI

 

 

 

 

 

 

RX

TX

CD

LP

 

 

MON

MON

 

 

 

 

 

 

 

 

RA

T1

AIM

 

 

 

E1-BAL

 

 

 

 

EN

 

C0

 

LA

E1-UNBAL

CTLR 0

Figure 2

2-PortChannelized T1/E1 PRI Network Module with G.703

 

NM-2CE1T1-PRI

 

 

 

 

 

 

 

 

 

CD

LP

RX

 

TX

CD

LP

 

 

MON

 

MON

 

 

 

 

 

 

 

 

RA

 

 

T1

C1

 

RA

T1

AIM

 

 

E1-BAL

 

E1-BAL

 

 

 

 

 

 

EN

LA

 

 

E1-UNBAL

C0

 

LA

E1-UNBAL

 

 

CTLR 1

 

 

 

 

CTLR 0

 

82886

82887

Enabling Wetting Current on Channelized T1/E1 PRI Network Modules with G.703

Wetting current is a small amount of electrical current (60 to 140 milliamps) sent from the central office to the card to prevent the corrosion of electrical contacts in the module network connection.

The wetting current feature can be enabled or disabled by the end user. It is controlled by the location of a jumper on the J8 (CTLR 0) and J9 (CTLR 1) connectors on the network module. (See Figure 3.)

To enable the wetting current feature, connect pins 1 and 2 on the J8 and J9 connectors with the jumper. To disable the wetting current feature, either remove the jumper completely, or use the jumper to connect pins 2 and 3 on the J8 and J9 connectors.

The card is shipped with the jumper connecting pins 2 and 3 on the J8 and J9 connectors, disabling the wetting current feature.

Connecting Cisco ISDN PRI Network Modules to the Network

3

Connecting Cisco ISDN PRI Network Modules to the Network

Channelized T1/E1 PRI Network Modules with G.703

Figure 3

Wetting Current Jumper Locations on Channelized T1/E1 PRI Network Modules with

 

G.703

J8/J9

1

2

3

Wetting current Wetting current jumper

enabled

J8/J9

1

2

3

Wetting current

disabled NM-2CE1T1-PRI

CD

 

 

 

RA

 

LP

 

LA

 

 

 

 

 

CTLR

 

T1

RX

 

E1-

 

1

E1-

MON

 

B

 

 

 

UNB

 

TX

MON

C1

C0

CD

 

 

RA

 

LP

LA

 

 

 

CTLR

 

T1

0

E1-

 

B

 

 

E1-

 

 

UNB

AIM

EN

88539

Connecting Channelized T1/E1 PRI Network Modules with G.703 to a Network

Warning For connections outside the building where the equipment is installed, the following ports must be connected through an approved network termination unit with integral circuit protection: T1

Statement 1044

Figure 4 shows a connection between a channelized T1/E1 PRI network module with G.703 and a networking device.

Caution To comply with the TelcordiaGR-1089NEBS standard for electromagnetic compatibility and safety, connect the1-portT1/E1 channelized PRI network modules with G.703(NM-1CE1T1-PRI)and2-portT1/E1 channelized PRI network modules with G.703(NM-2CE1T1-PRI)only to intrabuilding or nonexposed wiring or cabling. The intrabuilding cable must be shielded and the shield must be grounded at both ends.

Connecting Cisco ISDN PRI Network Modules to the Network

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