Hardware Requirements - Cisco 2600 Series Operation Manual

Hardware Requirements

In addition to the digital modem module, the router must contain a PRI or BRI network
module to connect to the ISDN channel, and another module, such as Ethernet, to provide
connectivity to the LAN.
Note
NM-2CT1-CSU, NM-1CE1B, NM-2CE1B, NM-1CE1U, or NM-2CE1U) must be revision
level -03.
The BRI S/T module with Cisco part number NM-4B-S/T or NM-8B-S/T must be revision
level -03, and the BRI U module with Cisco product number NM-4B-U or NM-8B-U must
be revision level -06.
If the PRI or BRI module is the wrong revision, you see a message similar to this one when
the router boots:
The T1 or E1 network module in slot 0 is incompatible with the digital
modems installed in the router.
To determine the revision level, you can examine the network module itself (outside the
router), or use the Cisco IOS show diag command. The label on the module board should
show a part number beginning with 800- and ending with -03 or -06. A PRI or BRI S/T
module whose part number ends with -01 or -02 needs to be upgraded, as does a BRI U
module whose part number is lower than -06.
The output of the show diag command looks similar to the following:
Slot 3:
The PRI module (Cisco product number NM-1CT1, NM-2CT1, NM-1CT1-CSU,
CT1 (CSU) port adapter, 1 port
Port adapter is analyzed
Port adapter insertion time unknown
Hardware revision 1.0
Serial number
Test history
EEPROM format version 1
EEPROM contents (hex):
0x20: 01 26 01 00 00 3F 5D 32 50 04 CC 01 00 00 00 00
0x30: 50 00 00 00 96 11 04 17 FF FF FF FF FF FF FF FF
Connecting Digital Modem Network Modules to a Network 10-3
Board revision A0
4152626 Part number
0x0 RMA number
Hardware Requirements
800-01228-01
00-00-00