Cisco Cisco VN 2900 Network Adaptation Interface Data Sheet

Data Sheet

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High-Density Digital Voice/Fax Network Modules
for Cisco 2800/2900/3800/3900 Series

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. The IP Communications High-

Density Digital Voice/Fax Network Modules flexibly operates within two different Cisco Unified

Communications (UC) environments—the Cisco Unified Communications Manager (UCM) system with

Survivable Remote Site Telephony (SRST) or Cisco Unified Communications Manager Express (UCME).

The network modules can be integrated with these IP Telephony solutions in a Unified Communications

Router, to provide a complete IP Communications solution for full service branch customers.

Figure 1. NM-HDV2-2T1/E1 with a 2-Port FXS VIC

Cisco IP Communications solutions provide the means for integrating voice and data allowing users to take

advantage of services such as IP telephony, integrated services, and toll-bypass. These solutions allow enterprises,

managed network service providers, and service providers to reap the advantages of Unified Communications such

as lower operating costs and increased productivity. Cisco Unified Communications solutions also enable packet

voice technologies including voice over IP (VoIP) (including H.323, Media Gateway Control Protocol (MGCP), and

Sessions Initiation Protocol (SIP), voice over Frame, voice over ATM (including AAL2 and AAL5 adaptation layers).

The IP Communications High-Density Digital Voice/Fax Network Modules are an integral part of the Cisco Unified

Communications offering, delivering a versatile combination of digital voice, analog voice, and data capabilities in a

single network module form factor. They not only provide the IP telephony gateway to Cisco UC architectures for

calls to and from the PSTN and the WAN, but also allow enterprises to deploy networks with existing traditional

telephony equipment until they are ready to migrate to IP telephony. Features include high-density digital voice and

WAN connectivity up to four T1/E1 ports, analog voice connectivity up to four ports, and up to 50 conferencing and

transcoding sessions1. Enterprises can now deploy all these rich features on a single network module, enabling

connectivity to the PSTN, traditional telephony equipment such as PBXs, key systems, analog telephones, fax

machines, and the enterprise WAN.