Used Cisco 2600 Series - Serial Connectivity Network Module

Part # NM-4A/S

Product Description: Cisco 2600, 2600XM, 2800, 3600, 3700, 3800 Series - 4-Port Async/Sync Serial Network Module.

Cisco 2600 Series Routers for Broadband Cable Networks
Cisco 2600 & 2600XM Router Series - VIEW ALL
Cisco Broadband Part Numbers - Listed Alphabetically

Cisco EtherSwitch Service Modules for Cisco 2600, 2800, 3700, and 3800 Series Routers