Cisco Interface Card NM-HDV2-2T1/E1

High Speed WAN Interface Card

Cisco HWIC-1DSU-T1

The IP Communications High-Density Digital Voice/Fax Network Modules are an addition to the Cisco Systems IP Communications suite of solutions. The IP Communications High-Density Digital Voice/Fax Network Modules deliver high-density digital voice connectivity, high-density WAN connectivity, analog voice connectivity, and conferencing and transcoding capability in a network module form factor. The network modules provide enterprises, managed service providers, and service providers with the ability to directly connect the public switched telephone network (PSTN), traditional telephony equipment (such as private branch exchange (PBX), key systems, analog telephones, and fax machines), and WAN to Cisco 2811, 2821, 2851, 2911, 2921, 2951, 3825, 3845 and 3925, 3945 Unified Communications Routers for either IP Communications capabilities or pure toll bypass.

Includes two built-in T1/E1 ports and a VIC/VWIC slot that can be fitted with either digital or analog/BRI voice/WAN interface cards. Supports a maximum of 120 channels of digital voice, or 60 channels of digital voice and four channels of analog voice in medium complexity codec. Up to four PVDM2 Packet Fax/Voice DSP modules can be used.


  • Network Management Support
  • High-Performance Flexible DSP Architecture
  • Voice Over Packet Support
  • IP Telephony Voice Gateway
  • Can be used on ISR1 AND ISR2 Models


Environmental Parameters
Humidity Range Operating:5 - 85% (non-condensing)
Max Operating Temperature:104 °F
Min Operating Temperature:32 °F
Manufacturer:Cisco Telephony
Model:IP Communications High-Density Digital Voice/Fax Network Module
Packaged Quantity:1
Product Line:Cisco
Interface Provided
Line Properties
Line Coding Format:AMI , B8ZS , CMI , HDB3
Line Rate:T-1/E-1
Compliant Standards:CS-03 , EN 60950 , EN 61000 , EN50082 , EN55022 , FCC CFR47 Part 15 B , FCC Class B certified , IEC 60950 , TBR12 , TBR13 , TBR4 , TIA/EIA-968-A
MTBF:939,368 hour(s)
Connectivity Technology:Wired
Data Compression Protocol:G.711 , G.722 , G.723.1 , G.726 , G.728 , G.729 , G.729.A , G.729.B
Digital Ports Qty:2
Digital Signaling Protocol:H.323 , H.323v2 , H.323v3 , H.323v4 , MGCP , SIP
Enclosure Type:Plug-in module
Features:Advanced Voice Busy-Out (AVBO) , Echo cancellation , Interactive Voice Response Support , Local Voice Busy-Out (LVBO) , Private Line Automatic Ring-Down (PLAR) , Voice Activity Detection (VAD)
Protocols & Specifications:ITU G.168 , ITU Q.931 , ITU T.37 , ITU T.38
Type:Voice / fax module
Voice Communication Support:VoATM , VoFR , VoIP
Remote Management Protocol:SNMP
Power Device
Slot Provided
Free Qty:1
Total Qty:1
Slot Required
Total Qty:1
Type:Expansion slot

Specifications are provided by the manufacturer. Refer to the manufacturer for an explanation of the print speed and other ratings.

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