Cisco CISCO2650 - 2650 Router Hardware Installation Manual page 111

Chapter 5 Connecting Serial Network Modules
Table 5-6
Slot Number
1
2
1
3
1. Cisco 3640 and Cisco 3660 routers only.
When an automatic configuration update is performed, the following message appears:
Line number convention changed from 16 lines/slot to 32 lines/slot.
4-Port Serial Network Module
This section provides information about the 4-port serial network module (Cisco product number
NM-4T). (See
provide an EIA/TIA-232, EIA/TIA-449, V.35, X.21, EIA/TIA-530 DTE, or nonreturn to zero/nonreturn
to zero inverted (NRZ/NRZI) serial interface. The module provides a synchronous data rate of 8 MB per
second on port 0, 4 MB per second each on port 0 and port 2, or 2 MB on all four ports simultaneously.
Note Half-duplex and binary-synchronous communications are not supported on the 4-port serial network
module.
Figure 5-5
SERIAL
4T
Connecting the 4-Port Serial Module to a Network
The 4-port serial network module provides four universal, high-density, 60-pin receptacles. The serial
cable attached to each receptacle determines the port's electrical interface type and mode, DTE or DCE.
After you install a 4-port serial module, use the appropriate serial cable to connect each of the DB-60
serial ports to a synchronous modem, channel service unit/data service unit (CSU/DSU), or other DCE
equipment. (See
OL-2485-20
New 4- and 8-Port Serial Network Module Interface Numbering (continued)
Interface Numbers (4-Port
Module)
65–68
97–100
Figure 5-5.) With the appropriate serial transition cable, each port on this module can
4-Port Serial Network Module
SERIAL 3 SERIAL 2
CN/LP RXC RXD TXC TXD CN/LP RXC RXD
Figure 5-6.)
Interface Numbers (8-Port
Module)
65–72
97–104
Serial ports (DB-60)
SERIAL 1
TXC TXD CN/LP RXC RXD TXC TXD
Cisco Network Modules Hardware Installation Guide
4-Port Serial Network Module
SERIAL 0
EN
CN/LP RXC RXD TXC TXD
5-9