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Understanding 1- or 2-Port ISDN PRI/Channelized E1 Network Modules


Contents

Introduction
Prerequisites
      Requirements
      Components Used
      Conventions
Product Numbers
Features
Platform Support
Configuration
Field Notices
NetPro Discussion Forums - Featured Conversations
Related Information

Introduction

The channelized E1/ISDN Primary Rate Interface (PRI) modules are available with one or two E1 ports with balanced or unbalanced interfaces and are compatible with the International Telecommunication Union Telecommunication Standardization Sector (ITU-T) G.703/G.704 specifications. The channelized E1/ISDN PRI modules receive and transmit data bidirectionally at the E1 rate of 2.048 Mbps and provide up to 30 virtual channels per E1 port.

hw-e1-a.gif

Prerequisites

Requirements

There are no specific requirements for this document.

Components Used

This document is not restricted to specific software and hardware versions.

Conventions

Refer to Cisco Technical Tips Conventions for more information on document conventions.

Product Numbers

NM-1CE1B

One-Port Channelized E1 or ISDN Primary Rater Interface (E1/ISDN PRI) Network Module, 120 ohm balanced

NM-2CE1B

Two-Port Channelized E1/ISDN PRI Network Module, 120 ohm balanced

NM-1CE1U

One-Port Channelized E1/ISDN PRI Network Module, 75 ohm unbalanced

NM-2CE1U

Two-Port Channelized E1/ISDN PRI Network Module, 75 ohm unbalanced

 

Refer to the Fast Ethernet Plus Channelized E1/PRI network modules.

Features

  • One or two E1 ports

  • Supports Channelized E1 or ISDN PRI

    • Each port is configured independently. You can configure one port for ISDN and the other for channelized E1.

  • Supports framed G.704. Refer to Understanding 1 and 2 Port E1 Multi-Flex Trunk Voice/WAN Interface Cards (VWICs) for unframed G.703.

  • They are available in balanced 120 ohm and unbalanced 75 ohm. Each requires different physical hardware. You cannot add hardware to an existing card in the field in order to upgrade.

  • Interface is DB-15.

Platform Support

Product Name

Cisco 2600

Cisco 2600XM

Cisco 3620, 3640

Cisco 3631

Cisco 3660

Cisco 2691, 3725, 3745

NM-1CE1B

Cisco IOS Software Releases 11.3(4)T, all 12.x

all Cisco IOS Software releases

all Cisco IOS Software releases

all Cisco IOS Software releases

Cisco IOS Software Releases 12.0(7)XK, 12.1T, 12.2, 12.2T

all Cisco IOS Software releases

NM-1CE1U

Cisco IOS Software Releases 11.3(4)T, all 12.x

all Cisco IOS Software releases

all Cisco IOS Software releases

all Cisco IOS Software releases

Cisco IOS Software Releases 12.0(7)XK, 12.1T, 12.2, 12.2T

all Cisco IOS Software releases

NM-2CE1B

Cisco IOS Software Releases 11.3(4)T, all 12.x

all Cisco IOS Software releases

all Cisco IOS Software releases

all Cisco IOS Software releases

Cisco IOS Software Releases 12.0(7)XK, 12.1T, 12.2, 12.2T

all Cisco IOS Software releases

NM-2CE1U

Cisco IOS Software Releases 11.3(4)T, all 12.x

all Cisco IOS Software releases

all Cisco IOS Software releases

all Cisco IOS Software releases

Cisco IOS Software Releases 12.0(7)XK, 12.1T, 12.2, 12.2T

all Cisco IOS Software releases

 

Note: The Cisco IOS Software releases provided are typically the minimum version required in order to support the platform, module, or feature in question. Use the Software Advisor ( registered customers only) in order to choose appropriate software for your network device: match software features to Cisco IOS and CatOS releases, compare IOS releases, or find out which software releases support your hardware.

Configuration

On the 1- or 2-Port ISDN PRI/Channelized E1 Network Module, the interfaces are addressed as controller <slot>/<unit>. Concurrent ISDN BRI and PRI module support requires Cisco IOS Software Release 11.3(3)T.

Refer to Configuring Channelized E1 and Channelized T1 for configuration assistance.

Configure the interface as you normally would a Channelized E1/PRI interface on any other router.

Field Notices

NetPro Discussion Forums - Featured Conversations

Networking Professionals Connection is a forum for networking professionals to share questions, suggestions, and information about networking solutions, products, and technologies. The featured links are some of the most recent conversations available in this technology.
NetPro Discussion Forums - Featured Conversations for Access
Network Infrastructure: Remote Access
PRI 2CE1B and DB-15 cable to simulate ISDN connection - Nov 9, 2007
876 Configuring dial backup - Nov 8, 2007
As5400 PPP MSCHAP Authentication failure - Nov 8, 2007
Bundleing and redundancy - Nov 8, 2007
Advice needed for VPN connections - Nov 7, 2007

Related Information

 

 

 

 

Cisco 3600 Series Multiservice Platforms

Cisco 2600/3600/3700 Series ISDN PRI Connectivity Options


CISCO 2600/3600/3700 ISDN PRI CONNECTIVITY OPTIONS

(NM-1CT1, NM-1CT1-CSU, NM-2CT1, NM-2CT1-CSU, NM-1CE1B, NM-2CE1B, NM-1CE1U, NM-2CE1U, NM-1FE1CT1, NM-1FE1CT1-CSU, NM-1FE2CT1, NM-1FE2CT1-CSU, NM-1FE1CE1B, NM-1FE1CE1U, NM-1FE2CE1B, NM-1FE2CE1U)

The astonishing versatility of the Cisco 2600, 3600 and 3700 router series is highlighted by its broad support of Integrated Services Digital Network Primary Rate Interface (ISDN PRI) connectivity.

The available Cisco 2600/3600/3700 PRI network modules provide various port densities to meet customer requirements at various price points. The optional, integrated CSU lets customers consolidate customer premises equipment (CPE) to provide multifunction dial access server, router, and other capabilities within the Cisco 2600/3600/3700 series in power branch office environments. The balanced and unbalanced serial connectivity options enable conformity to a customer's specific application.
Customers can choose among a number of network module options to precisely fit their requirements:

NM-1CT1-One-port Channelized T1/ISDN PRI

NM-1CT1-CSU-One-port Channelized T1/ISDN PRI with Channel Service Unit (CSU)

NM-2CT1-Two-port Channelized T1/ISDN PRI

NM-2CT1-CSU-Two-port Channelized T1/ISDN PRI with CSU

NM-1CE1B-One-port Channelized E1/ISDN PRI, balanced

NM-1CE1U-One-port Channelized E1/ISDN PRI, unbalanced

NM-2CE1B-Two-port Channelized E1/ISDN PRI, balanced

NM-2CE1U-Two-port Channelized E1/ISDN PRI, unbalanced

NM-1FE1CT1-One-port 10/100BaseTX Ethernet with one-port T1 PRI/Channelized

NM-1FE1CT1-CSU-One-port 10/100BaseTX Ethernet with one-port T1 PRI/Channelized with integrated CSU

NM-1FE2CT1-One-port 10/100BaseTX Ethernet with two-port T1 PRI/Channelized

NM-1FE2CT1-CSU-One-port 10/100BaseTX Ethernet with two-port T1 PRI/Channelized with integrated CSU

NM-1FE1CE1B-One-port 10/100BaseTX Ethernet with one-port E1 PRI/Channelized Balanced mode (120 ohm)

NM-1FE1CE1U-One-port 10/100BaseTX Ethernet with one-port E1 PRI/Channelized Unbalanced mode (75 ohm)

NM-1FE2CE1B-One-port 10/100BaseTX Ethernet with two-port E1 PRI/Channelized Balanced mode (120 ohm)

NM-1FE2CE1U-One-port 10/100BaseTX Ethernet with two-port E1 PRI/Channelized Unbalanced mode (75 ohm)

Note: The 2600 and 3700 Series only supports PRI network modules without a LAN connection.
Note: The 3631 Series is not supported.
For midrange, high-density ISDN PRI applications, the Cisco 2600/3600/3700 provides superior performance and port densities. For example, a fully configured Cisco 3640 can support 8 ISDN PRI ports in one chassis, which can be multiplexed to provide up to 192 T1 channels at 56/64 kbps T1, or 240 E1 channels at 56-64 kbps.
These PRI and FE/PRI network modules support the 3600 and 3700 internal digital modems in the 3600 and 3700 for PRI, CT1, and R2 connections. This allows up to 30 V.90 modems in a 3620 or 60 V.90 modems in a 3640.

Figure 1. High Density ISDN Applications

Table 1. Physical Limitations of ISDN PRI Modules per Chassis

Number of Modules per Chassis

Type of Module

Cisco 3745

Cisco 3725

Cisco 3660

Cisco 3640

Cisco 3631

Cisco 3620

Cisco 2600

NM-1CT1, 2CT1
4
2
6
3
N/A
1
1
NM-1CT1-CSU, 2CT1-CSU
4
2
6
3
N/A
1
1
NM-1CE1B, 2CE1-B
4
2
6
3
N/A
1
1
NM-1CE1U, 2CE1-U
4
2
6
3
N/A
1
1
NM-1FE1CT1, NM1FE2CT1
N/A
N/A
N/A
4
N/A
2
N/A
NM-1FE1CT1-CSU, NM-1FE2CT1-CSU
N/A
N/A
N/A
4
N/A
2
N/A
NM-1FE1CE1B, NM-1FE2CE1B
N/A
N/A
N/A
4
N/A
2
N/A
NM-1FE1CE1U, NM-1FE2CE1U
N/A
N/A
N/A
4
N/A
2
N/A

 

Table 2. Cisco IOS release requirements for ISDN PRI modules

Type of Module

Cisco IOS Release

NM-1CT1, 2CT1
11.1.(8)AA or later
NM-1CT1-CSU, 2CT1-CSU
11.1.(8)AA or later
NM-1CE1B, 2CE1-B
11.1.(8)AA or later
NM-1CE1U, 2CE1-U
11.1.(8)AA or later
NM-1FE1CT1, NM1FE2CT1
11.3(4)T or later
NM-1FE1CT1-CSU, NM-1FE2CT1-CSU
11.3(4)T or later
NM-1FE1CE1B, NM-1FE2CE1B
11.3(4)T or later
NM-1FE1CE1U, NM-1FE2CE1U
11.3(4)T or later

 

Table 3. Technical Specifications for NM-1CT1, 2CT1, NM-1CT1-CSU, 2CT1-CSU, NM-1CE1B, 2CE1-B, NM-1CE1U, 2CE1-U, NM-1FE1CT1, NM1FE2CT1, NM-1FE1CT1-CSU, NM-1FE2CT1-CSU, NM-1FE1CE1B, NM-1FE2CE1B, NM-1FE1CE1U, NM-1FE2CE1U

Technical Specifications

Dimensions (H x W x D)
1.55 x 7.10 x 7.2
Weight
2 lbs max

Homologation

Environmental Conditions
Op. temp. 32-104 F (0-40 C)
Non-op. temp
-13-158 F (-25-70 C)
Relative Humidity
5-95%

Safety

Protocols Supported
Full Cisco IOS support by release 11.2
EMI
Class B EMI/Class B EMI

 

The following cables are available:

Cable Type

Product Number

Length

Male/Female

For Use With

MIP-CT1 DSX1 to DB15 through cable
CAB-7KCT1DB15
   
CT1/CE1 PRI
MIP-CT1 DSX1 to DB15 null cable
CAB-7KCT1NULL
   
CT1 / PRI
E1 ISDN PRI
CAB-E1-PRI
10 ft.
 
CE1 / PRI
E1 Twinax 120 ohm balanced
CAB-E1-TWINAX
3m
 
CE1 / PRI
E1 DB15 120 ohm balanced
CAB-E1-DB15
5m
 
CE1 / PRI
FSIP and MIP-CE1 BNC 75 ohm unbalanced
CAB-E1-BNC
5m
 
CE1 / PRI

 

LEDs-Network module status indicator, status LEDs, including carrier detect, local/remote alarm, and loopback. Network interfaces-All supported by Cisco 3700/3600/2600 LAN Routers.

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