3Com VCX V7122 User Manual page 107

ini File Field Name
*
Web Parameter Name
CoderName
[Coders]
TransparentPayloadType
IsFaxUsed
[Enable T.38 Fax Relay]
T38UseRTPPort
3Com VCX V7122 SIP VoIP Gateway User Manual
Valid Range and Description
CoderName = Coder,ptime (can appear up to 5 times)
The following coder names can be selected:
g711Alaw64k – G.711 A-law.
– G.711 µ-law.
g711Ulaw64k
g7231 – G.723.1 6.3 kbps (default).
g7231r53 – G.723 5.3 kbps.
g726 – G.726 ADPCM 32 kbps (Payload Type = 2).
g729 – G.729A.
NetCoder6_4 – NetCoder 6.4 kbps.
NetCoder7_2 – NetCoder 7.2 kbps.
NetCoder8 – NetCoder 8.0 kbps.
NetCoder8_8 – NetCoder 8.8 kbps.
Transparent – Transparent coder.
Note: The coder name is case-sensitive.
The RTP packetization period (ptime, in msec) depends on the selected Coder
name, and can have the following values:
g711 family – 10,20,30,40,50,60,80,100,120 (default=20).
g729 – 10,20,30,40,50,60,80,100,120 (default=20).
g723 family – 30,60,90,120,150 (default = 30).
G.726 – 10, 20, 40, 60, 80, 100, 120 (default=20).
NetCoder family – 20, 40, 60, 80, 100, 120 (default=20).
Note 1: If not specified, the ptime gets a default value.
Note 2: Each coder should appear only once.
Note 3: The ptime specifies the maximum packetization time the gateway can
receive.
Note 4: G.729B is supported if the coder G.729 is selected and
'EnableSilenceCompression' is enabled.
For example:
CoderName = g711Alaw64k,20
CoderName = g711Ulaw64k,40
CoderName = g7231,90
Specifies the payload type that is used when the selected coder is set to
'Transparent'.
The valid range is 96-120. The default value is 56.
0 = T.38 Fax relay disabled (default)
1 = Enable T.38 Fax Relay
Note: FaxTransportMode can be set to 0 (transparent). The gateway
automatically changes the Fax transport mode to T.38 if "IsFaxUsed=1" and
fax is detected.
If "IsFaxUsed=0" fax can be sent (transparently) if G.711 coder is used.
Defines that the T.38 packets are sent / received using the same port as RTP
packets.
0 = Use the RTP port +2 to send / receive T.38 packets (default).
1 = Use the same port as the RTP port to send / receive T.38 packets.
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