AudioCodes Mediant 600 - Page 622

SIP User's Manual 622 Document #: LTRT-83310
Mediant 600 & Mediant 1000
Parameter Description
AMR
[Amr]
20 (default) 4.75 [0],
5.15 [1],
5.90 [2],
6.70 [3],
7.40 [4],
7.95 [5],
10.2 [6],
12.2 [7]
(default)
Dynamic (0-
127)
Disable [0]
Enable [1]
QCELP
[QCELP]
20 (default), 40, 60,
80, 100, 120
Always
13
Always 12 Disable [0]
Enable [1]
EVRC
[Evrc]
20 (default), 40,60,
80, 100
Variable
[0]
(default),
1/8 [1],
1/2 [3],
Full [4]
Dynamic (0-
127)
Disable [0]
Enable [1]
iLBC
[iLBC]
20 (default), 40, 60,
80, 100, 120
15
(default)
Dynamic (0-
127)
Disable [0]
Enable [1]
30 (default), 60, 90,
120
13
Transparent
[Transparent
]
10, 20 (default), 40,
60, 80, 100, 120
Always
64
Dynamic (0-
127)
Disable [0]
Enable [1]
T.38
[t38fax]
N/A N/A N/A N/A
Notes:
 The coder name is case-sensitive.
 Each coder type can appear only once per Coder Group.
 Only the packetization time of the first coder in the defined coder list is
declared in INVITE/200 OK SDP, even if multiple coders are defined.
 The device always uses the packetization time requested by the remote
side for sending RTP packets. If not specified, the packetization time is
assigned the default value.
 The value of several fields is hard-coded according to common standards
(e.g., 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.
 If silence suppression is not defined for a specific coder, the value defined
by the parameter EnableSilenceCompression is used.
 If G.729 is selected and silence suppression is enabled (for this coder), the
device 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 is when the remote device is a
Cisco gateway (IsCiscoSCEMode).
 The coder G.722 provides Packet Loss Concealment (PLC) capabilities,
ensuring higher voice quality.
 Both GSM-FR and MS-GSM coders use Payload Type 3. When using
SDP, it isn’t possible to differentiate between the two. Therefore, it is
recommended not to select both coders simultaneously.
 A Coder Group can be assigned to an IP Profile (using the IPProfile
parameter) and/or to a Tel Profile (using the TelProfile parameter).
 For information on V.152 (and implementation of T.38 and VBD coders),
see 'V.152 Support' on page 150.
 For a description of using ini file table parameters, see 'Configuring ini File
Table Parameters' on page 84.