Cisco 2600 Series Operation Manual page 65

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Figure 6-6
SERIAL
4T
CN/LP RXC
Table 6-6
LED
CN/LP
RXC
RXD
TXC
TXD
16-Port and 32-Port Asynchronous Serial Network Module
This section provides information about the following network modules for Cisco modular
routers:
16-port asynchronous network module—(Cisco product number NM-16A). (See
Figure 6-7.)
32-port asynchronous network module—(Cisco product number NM-32A). (See
Figure 6-8.)
When used with corresponding octal cables, these modules provide 16 or 32 EIA/TIA-232
data terminal equipment (DTE) serial interfaces. Speeds up to 134.4 kbps are supported.
16-Port and 32-Port Asynchronous Serial Network Module
4-Port Serial Network Module LEDs
SERIAL 3
SERIAL 2
RXD
TXC
TXD
CN/LP RXC
RXD
TXC
4-Port Serial Network Module LEDs
Meaning
Connect when green, loopback when yellow
Receive clock
Receive activity
Transmit clock
Transmit activity
SERIAL 1
TXD
CN/LP RXC
RXD
TXC
TXD
Serial port LEDs
Connecting Serial Network Modules to a Network 6-13
SERIAL 0
EN
CN/LP RXC
RXD
TXC
TXD
Enable LED

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