| Description | The object specifies the session target of the peer.
Session Targets definitions:
The session target has the syntax used by the IETF service
location protocol. The syntax is as follows:
mapping-type:type-specific-syntax
the mapping-type specifies a scheme for mapping the
matching dial string to a session target.
The valid Mapping type definitions for the peer are as
follows:
loopback - Syntax: loopback:where
'where' string is defined as follows:
compressed - loopback is performed on compressed voice
as close to the CODEC which processes the
data as possible.
uncompressed - loopback is performed on the PCM or
analog voice as close to the telephony
endpoint as possible.
Local loopback case:
uncompressed - the PCM voice coming into the DSP is simply
turned around and sent back out, allowing testing of
the transmit--> receive paths in the telephony
endpoint.
compressed - the compressed voice coming out of the CODEC is
turned around on the DSP module and fed back into the
decompressor through the jitter buffer. In addition to
the telephony endpoint, this tests both the encode and
decode paths without involving data paths or packet
handling on the host router.
Remote loopback case:
compressed - RTP packets received from the network are
decapsulated and passed to the DSP board. Instead of
feeding these into the CODEC for decompression, they
are immediately sent back to the session application
as if they had originated locally and been compressed.
uncompressed - In addition to the above, the voice samples
are sent all the way through the CODEC and then turned
around instead of being sent to the telephony
endpoint |