Cisco Cisco 2600 3600 Series 1-Port 30-Channel J1 Voice Fax Network Module Data Sheet
Data Sheet
© 2009 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
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Table 2.
Codec Support on the PVDM2 Module
Name
High-Complexity Codecs
Medium-Complexity Codecs
PVDM2 Module
G.723.1, G.728, G.729, G.729b, iLBC, and Modem Relay
G.7112, g.729a, G.729ab, G.726, G.722, and Fax Relay
* PVDM2 can support a higher density of G.711 calls than that of other medium-complexity codecs. See Table 1.
PVDM2 connects to the host through 80-pin single inline memory module (SIMM) slots. The module is field
insertable and removable. Figure 2 shows how PVDM2 is plugged into PVDM2 SIMM slots on the Cisco high-density
digital voice network modules.
Figure 2. PVDM2 SIMM Slots on the Cisco High-Density Digital Voice Network Modules
Features and Benefits
Investment Protection and Field-Upgradable Capability
PVDM2 is used across a series of Cisco Integrated Services Routers and high-density voice network modules,
allowing users to distribute or reuse DSP resources among the routers or network modules as needed. The field-
upgradable capability enables users to easily scale their voice deployments.
In addition, each DSP on the PVDM2 provides four times the processing power and more memory than the existing
PVDM. The high performance of PVDM2 supports future growth.
High Density and Flexibility
PVDM2 provides high call density per DSP and flexibility of channel allocation. The maximized support of
uncompressed G.711 voice calls optimizes DSP utilization for the solutions, mainly based on G.711 codecs such as
IP telephony, in a LAN where the bandwidth consumed by uncompressed calls is not a concern.
Conferencing and Transcoding Services
With PVDM2, Cisco Integrated Services Routers and voice network modules provide both digital and analog voice
connections and conferencing and transcoding services. In conjunction with host software, PVDM2 supports
universal transcoding when needed. Universal transcoding allows transcoding from any supported codec to any
other supported codec. As a general rule, the number of sessions needed for a universal transcoding channel is the
sum of the session requirements for two separate voice channels, one running each of the configured codecs. For
example, a channel running universal transcoding from a G.729a codec to iLBC would need the session capacity for
a voice channel running the G.729a codec and MIPS (million instructions per second) for a voice channel running
the iLBC codec.