Cisco Cisco IOS Software Releases 12.2 MC

Alarm Interface Card—NM-AIC-64(=)

16-port Ethernet Switch—NM-16ESW(=) 

When using the NM-16ESW with the MWR 1941-DC router, shielded cables are required 
and IP phone inline power is not supported.

Asynchronous

16-port Asynchronous Serial—NM-16A(=)

4-port Asynchronous/Synchronous Serial: NM-4A/S(=)

8-port Asynchronous/Synchronous Serial: NM-8A/S(=)

1-port T3/E3: NM-1T3/E3(=)

The Cisco MWR 1941-DC router does not support online insertion and removal (OIR) of WAN interface 
cards. Any attempt to perform OIR on a card in a powered up router might cause damage to the card.

The Cisco MWR 1941-DC router does not support online insertion and removal (OIR) of network 
modules. Any attempt to perform OIR on a card in a powered up router might cause damage to the card.

Removing the compact flash from the Cisco MWR 1941-DC router during a read/write operation might 
corrupt the contents of the compact flash, rendering it useless. To recover from an accidental removal of 
or corruption to the compact flash, a maintenance spare with the appropriate bootable Cisco IOS 
software image might be needed.

When using the 1-port T3/E3 network module in your MWR 1941-DC router configuration, note that E3 
mode is not supported with Cisco IOS Release 12.2(15)MC1a. E3 mode is supported with Cisco IOS 
Release 12.2(15)MC1b and later.

Also, when used with the MWR 1941-DC router, the NM-1T3/E3 supports line rate throughput for traffic 
with packet sizes of 1500 bytes. For traffic with smaller packet sizes, degradation in throughput will be 
seen.

When upgrading the image on your Cisco MWR 1941-DC router, power cycle the router or perform a 
microcode reload on the VWIC-2MFT-T1-DIR to ensure that the firmware for the VWIC-2MFT-T1-DIR 
is updated during the upgrade.