NM-2CE1T1-PRI Cisco 2-Port Channelized E1/T1 ISDN PRI Network Module

The NM-2CE1T1-PRI is a Cisco 2-port channelized E1/T1/ISDN-PRI network module with an integrated CSU/DSU on each port. Both ports use RJ-48C connectors, and Cisco IOS Software sets them for T1 or E1 operation, with balanced or unbalanced E1 termination.

One set of Tx/Rx Mon bantam jacks serves line monitoring, and the Cisco IOS command line selects whether the jacks follow port 0 or port 1 without interrupting service. LEDs on each port report T1 mode, E1 balanced mode, E1 unbalanced mode, carrier detect, loop condition, remote alarm and local alarm, while the module LEDs C0, C1 and EN cover the monitor jacks and module enable.

Loopback support includes controller and interface loopbacks for E1, interface local and remote loopbacks for T1, and CSU loopbacks for T1 in DTE, network, payload and V.54 modes. Blue, yellow and red alarm detection is included. E1 runs in unframed G.703 or framed G.704 mode.

To comply with the Telcordia GR-1089 NEBS standard, the module connects only to intrabuilding or non-exposed wiring, using shielded cable grounded at both ends. In a Cisco 3745, up to eight ISDN PRI connections can be channelized into up to 192 T1 channels or 240 E1 channels at 56/64 Kbps each. The 1-port model is the NM-1CE1T1-PRI. More WAN cards are in Cisco interface cards, and the hosting routers are in Cisco routers.