NM-HDV2-2T1/E1 Cisco IP Comm. High Density Digital Voice Network Module
Cisco NM-HDV2-2T1/E1 IP Communications High-Density Digital Voice Network Module
Enterprise Cisco NM-HDV2-2T1/E1 High-Density Digital Voice Module for Unified Communications and T1/E1 Voice Services
The Cisco NM-HDV2-2T1/E1 High-Density Digital Voice Network Module is designed to expand voice and unified communications capabilities on compatible Cisco Integrated Services Routers. It features 2 integrated T1/E1 interfaces, 1 VIC/VWIC expansion slot, and support for up to 4 PVDM2 DSP modules, providing scalable digital voice and fax processing for enterprise branch offices and service provider environments. The module enables reliable PSTN and ISDN connectivity while allowing organizations to expand voice capacity without replacing their existing router infrastructure.
Running with compatible Cisco IOS voice services, the NM-HDV2-2T1/E1 supports VoIP gateways, SIP, H.323, Cisco Unified Communications Manager (CUCM), Survivable Remote Site Telephony (SRST), conferencing, transcoding, and fax services. Its modular DSP architecture supports voice processing and codecs such as G.711 and G.729, with capabilities dependent on the installed PVDM2 modules and software configuration.
The Cisco NM-HDV2-2T1/E1 is an ideal solution for enterprise IP telephony, branch office voice gateways, Unified Communications deployments, T1/E1 PSTN connectivity, SIP and H.323 voice services, and voice and fax integration. Its flexible expansion architecture makes it a practical choice for organizations modernizing legacy digital voice infrastructure while integrating it with Cisco-based IP communications environments.
Product Specifications - Cisco NM-HDV2-2T1/E1 High-Density Digital Voice Network Module
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| Specification | Details |
|---|---|
| Product Name | Cisco NM-HDV2-2T1/E1 High-Density Digital Voice Network Module |
| Manufacturer | Cisco Systems |
| Part Number | NM-HDV2-2T1/E1 |
| Product Type | High-Density Digital Voice Network Module |
| Module Series | Cisco NM-HDV2 Series |
| Integrated Interfaces | 2 × T1/E1 Ports |
| Expansion Slot | 1 × VIC/VWIC Expansion Slot |
| DSP Support | Up to 4 × PVDM2 DSP Modules |
| Voice Processing | High-Density Digital Voice and Fax Processing |
| T1/E1 Support | T1 and E1 Voice/ISDN Connectivity |
| Signaling | ISDN PRI and CAS, Configuration Dependent |
| Voice Protocols | VoIP, SIP and H.323 |
| Voice Gateway | Supported |
| Fax Support | VoIP Fax Services |
| Echo Cancellation | Supported through Compatible DSP Resources |
| Codec Support | G.711, G.729 and Other Cisco IOS Voice Codecs, Configuration Dependent |
| Unified Communications | Cisco Unified Communications Support |
| CUCM Integration | Cisco Unified Communications Manager Support |
| SRST | Cisco Survivable Remote Site Telephony Support |
| Operating System | Cisco IOS |
| Router Compatibility | Cisco 2800, 2900, 3800 and 3900 Series Integrated Services Routers |
| Cisco 2800 Compatibility | Supported on Compatible Models |
| Cisco 2900 Compatibility | Supported on Compatible Models |
| Cisco 3800 Compatibility | Supported on Compatible Models |
| Cisco 3900 Compatibility | Supported on Compatible Models |
| PSTN Connectivity | Supported through T1/E1 Interfaces |
| ISDN Connectivity | Supported |
| Digital Voice Capacity | High-Density Voice Processing |
| Modularity | VIC/VWIC Expansion and PVDM2 DSP Expansion |
| Management | Cisco IOS CLI and Network Management Tools |
| Installation | Modular Network Module Slot |
| Power | Supplied by Host Integrated Services Router |
| Deployment | Enterprise Branch, IP Telephony and Voice Gateway |
| Application | Voice Gateway, PSTN Access, Unified Communications and Fax |
| Condition | Refurbished |
| Use Cases | Enterprise IP Telephony, Branch Office Voice Gateways, Unified Communications, PSTN Connectivity, SIP/H.323 Voice Services, Voice and Fax Integration |
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FAQs
Q1. What is the Cisco NM-HDV2-2T1/E1?
The Cisco NM-HDV2-2T1/E1 is a high-density digital voice network module that provides two integrated T1/E1 interfaces, DSP expansion, and enterprise voice processing for Cisco Integrated Services Routers.
Q2. Who should buy the Cisco NM-HDV2-2T1/E1?
The Cisco NM-HDV2-2T1/E1 is ideal for enterprises, service providers, branch offices, government agencies, and organizations deploying Cisco Unified Communications, VoIP gateways, and digital voice services.
Q3. Is a refurbished Cisco NM-HDV2-2T1/E1 worth buying?
Yes. A professionally refurbished Cisco NM-HDV2-2T1/E1 delivers enterprise-grade voice processing, reliable T1/E1 connectivity, and significant cost savings while maintaining Cisco's proven performance and reliability.
Q4. How many voice channels does the Cisco NM-HDV2-2T1/E1 support?
The module supports up to 120 digital voice channels or 60 digital voice channels plus four analog voice channels, depending on the installed DSP modules and codec configuration.
Q5. Does the Cisco NM-HDV2-2T1/E1 require DSP modules?
Yes. The module supports one to four PVDM2 DSP modules, which provide the voice and fax processing resources required for VoIP, conferencing, transcoding, and T1/E1 voice applications.
