Configuring Voice
Configuring Voice Services
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Cisco SRP500 Series Services Ready Platforms Administration Guide (SRP520 Models)
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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
Description
G.711 (A-law and mu-law)
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.
Services
Ready
Platform
Telephone/fax
Ethernet
V
V
V
Phone
V
V
PSTN
Internet
Service Provider
VoIP Infrastructure
SIP proxy
IP
Voice
gateway
236741