Serial Interface Modules
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What routers support the NM-32A module?
The NM-32A is compatible with Cisco 2800 series (2801, 2811, 2821, 2851) and 3800 series (3825, 3845, 3925, 3945) routers that have available NM slots.
How many serial ports does the NM-32A provide?
The NM-32A provides 32 asynchronous serial ports via RJ-45 connectors, each supporting data rates up to 115.2 kbps.
What IOS version is required?
The NM-32A requires Cisco IOS 12.4 or later. Ensure your router runs a compatible firmware version before installation.
Is the NM-32A still supported by Cisco?
No, the NM-32A is end-of-life. Limited support is available, and Cisco recommends modern alternatives for new deployments.
What applications use serial ports on the NM-32A?
Common uses include WAN connections via serial interfaces, modem pools, terminal servers, and connections to legacy serial devices and equipment.
How is the module installed?
Insert the NM-32A into an available Network Module (NM) slot on the router chassis. Restart the router for the module to be recognized.