Srp Voice Features; Supported Codecs - Cisco SR520-FE-K9 Administration Manual

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88
Telephone/fax
The SRP maintains the state of each call made through the FXS interface and
makes the proper reaction to user input events (such as on/off hook or hook flash).
Because the SRP uses the Session Initiation Protocol (SIP), it is compatible with
most Internet Telephony Service Provider offerings.

SRP Voice Features

The SRP is equipped with fully featured, programmable voice ports that can be
custom provisioned within a wide range of configuration parameters. The
following sections describe the factors that contribute to voice quality:
•

Supported Codecs

• SIP Proxy Redundancy
• Other SRP Voice Features
Supported Codecs
The SRP voice ports support the following codecs:
Codec
G.711 (A-law and mu-law)
Cisco SRP500 Series Services Ready Platforms Administration Guide (SRP520 Models)
V
Ethernet
V
Services
Ready
Platform
Description
Very low complexity codecs that support
uncompressed 64 kbps digitized voice
transmissions at one through ten 5 ms voice frames
per packet. These codecs provide the highest
narrow-band voice quality and uses the most
bandwidth of any of the available codecs.
Configuring Voice
Configuring Voice Services
Voice
gateway
Internet
Service Provider
V
V
V
VoIP Infrastructure
IP
SIP proxy
PSTN
Phone