Cisco Cisco 2600 3600 3700 Series T3 E3 Network Module Data Sheet

Data Sheet

Page 1 of 1

Cisco T3/E3 Network Module

The Cisco

T3/E3 Network Module provides high-speed WAN access for the Cisco 2600, 2800, 3600, 3700 , 3800

Series routers, as well as the Cisco 2951, and 3900 Series Integrated Services Routers. The NM-1T3/E3 network

module offers both Service Providers and Enterprise customer's unprecedented flexibility in provisioning clear-

channel T3 or E3 connections.

Figure 1. Cisco T3/E3 Network Module

Cisco's Packet-over-T3/E3 network module for the Cisco Integrated Services Routers series offers the first software-

configurable T3/E3 product from Cisco. This flexible network module allows the customer to switch between T3 and

E3 applications with a single Cisco IOS

command. This feature provides customers increased flexibility and

investment protection by allowing a Cisco Partner, service provider or enterprise customer to stock only a single

product that can be deployed internationally.

The increased demand for bandwidth over the WAN and more attractive pricing of T3/E3 links by SPs has led to

steady growth in T3/E3 deployments around the world. The Packet-over T3/E3 network module (part number NM-

1T3/E3) eliminates the need for an external data service unit (DSU), reduces provisioning costs, and provides highly

manageable T3/E3 line termination. The module provides an integrated line interface unit (LIU) DSU that allows T3

or E3 lines to be directly terminated on a Cisco router, eliminating the need for external DSU equipment. This

simplifies the T3/E3 line management, reduces provisioning cost, and frees up valuable rack space.

The Cisco T3/E3 network modules provide support for the proprietary subrate and scrambling features of T3 DSU

vendors such as Digital Link, Larscom, and ADC Kentrox. Subrate support in the Cisco T3/E3 Network Module

maximizes the utility of these products in service provider environments By simultaneously supporting interoperability

with a wide range of third-party DSU vendors, this network module offers the flexibility to support installed equipment

without locking customers into a proprietary solution.

The Cisco T3/E3 Network Module provides direct connectivity to a T3 line for full-duplex communications at the T3

rate of 44.736 MHz and full-duplex E3 communications at 34.368 MHz. Each T3 or E3 port consists of a pair of 75-

ohm BNC coaxial connectors (Type RG-59), one for transmit data and one for receive data, along with six LED

indicators for line status. The Cisco T3/E3 Network Module is supported in all Cisco IOS feature sets, and there are

no additional memory requirements.