User`s manual

Mediant 2000 & TP-1610 & TP-260
SIP User's Manual 168 Document #: LTRT-68805
Table 6-7: SIP Configuration Parameters (continues on pages 150 to 169)
ini File Field Name
Web Parameter Name
Valid Range and Description
30 (default), 60, 90,
120
13
T.38
[t38fax]
N/A N/A N/A N/A
G.711A-law_VBD
[g711AlawVbd]
10, 20 (default), 30,
40, 50, 60, 80, 100,
120
Always 64 Dynamic
(0-120)
N/A
G.711U-law_VBD
[g711UlawVbd]
10, 20 (default), 30,
40, 50, 60, 80, 100,
120
Always 64 Dynamic
(0-120)
N/A
Note 1: The coder name is case-sensitive.
Note 2: If silence suppression is not defined (for a specific coder), the value
defined by the parameter EnableSilenceCompression is used.
Note 3: The value of several fields is hard-coded according to well-known
standards (e.g., the payload type of G.711 U-law is always 0). Other values
can be set dynamically. If no value is specified for a dynamic field, a default
value is assigned. If a value is specified for a hard-coded field, the value is
ignored.
Note 4: Only the ptime of the first coder in the defined coder list is declared in
INVITE / 200 OK SDP, even if multiple coders are defined.
Note 5: If the coder G.729 is selected and silence suppression is enabled (for
this coder), the gateway includes the string ‘annexb=no’ in the SDP of the
relevant SIP messages. If silence suppression is set to ‘Enable w/o
Adaptations’, ‘annexb=yes’ is included. An exception to this logic is when the
remote gateway is a Cisco device (IsCiscoSCEMode).
Note 6: Both GSM-FR and MS-GSM coders use Payload Type = 3. Using
SDP, it isn’t possible to differentiate between the two. Therefore, it is highly
recommended not to select both coders simultaneously.
Note 7: This parameter (CoderName_ID) can appear up to 20 times (five
coders in four coder groups).
For example:
CoderName_1 = g711Alaw64k,20,,,0
CoderName_1 = g711Ulaw64k,40
CoderName_1 = g7231,90,1,,1
CoderName_2 = g726,$$,2,,0