2x Voice/Fax Interface Card Slot Network Module, Supports four voice calls
Cisco 2x Voice/Fax Slot Network Module, Cisco 2600, 3600 and 3700 routers, Wired, H.323, 2x slots for Interface Cards
Cisco 2x Voice/Fax Slot Network Module. Compatibility: Cisco 2600, 3600 and 3700 routers. Connectivity technology: Wired, Compliance industry standards: H.323. I/O ports: 2x slots for Interface Cards