NM-HDV2-1T1 / E1

The Cisco NM-HDV2-1T1/E1 is an enterprise-grade network module designed to deliver high-density digital voice over a single T1/E1 interface for Cisco routers. This Cisco module integrates IP communications and traditional TDM connectivity, enabling efficient voice consolidation in branch and regional offices. With hot-swappable installation, low 38.4 W power consumption, and robust redundancy, it helps partners and end users build reliable converged voice networks across Asia, Europe, Africa, and North America.

Product Features Comparison

Model	NM-HDV2-1T1/E1, Cisco NM-HDV2 Series Network Module, 1 T1/E1, High-Density Voice, For Cisco Routers	HWIC-4T, Cisco HWIC-4T Router Module, 4 Serial Ports/8 Mbps per Port/WAN Interface	PVDM2-36DM, Cisco PVDM2 Series Digital Modem Module, 36 Ports, Digital Modem, Plug-in Module	NME-AIR-WLC25-K9, Cisco NME-AIR-WLC25-K9 Wireless LAN Controller, 25 AP support/Router NM/For 2800 3800 Series
Brand	Cisco	Cisco	Cisco	Cisco
Module Type	Network Module	n/a	n/a	n/a
Port Configuration	1 T1/E1	4-Port Serial HWIC Cisco Router High-Speed WAN Interface card, 8 Mbps per port	n/a	Access Points Supported: Up to 25
Supported Speed	n/a	Synchronous Maximum Speed (per port): 8 Mbps; Asynchronous Maximum Speed (per port): 230.4 kbps	n/a	Data Throughput: Up to 300 Mbps
Compatible Platform	Cisco Routers	n/a	Hardware Platform Compatibility: Cisco 2800, 2900, 3800, and 3900 Series	Compatibility: Cisco 2800/3800 Series Routers
Installation Type	Hot-Swappable: Yes	n/a	n/a	Interface: Network Module (NM)