Cisco 3600 - 24 Port Digital Modem Network Module Installation Guide Page 65

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Connecting Serial Network Modules to a Network 6-13
16-Port and 32-Port Asynchronous Serial Network Module
Figure 6-6 4-Port Serial Network Module LEDs
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.
Table 6-6 4-Port Serial Network Module LEDs
LED Meaning
CN/LP Connect when green, loopback when yellow
RXC Receive clock
RXD Receive activity
TXC Transmit clock
TXD Transmit activity
H9599
CN/LP RXC
SERIAL 3 SERIAL 2 SERIAL 1 SERIAL 0
RXD TXC TXD CN/LP RXC RXD TXC TXD CN/LP RXC RXD TXC TXD CN/LP RXC RXD TXC TXD
EN
SERIAL
4T
Serial port LEDs
Enable LED
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