AudioCodes Mediapack mp-11x, User Manual

Page: 94 / 390

SIP User's Manual 94 Document #: LTRT-65409
MediaPack Series
Notes:
•
Each coder (i.e., 'Coder Name') can appear only once.
•
If packetization time and / or rate are not specified, the default value is
applied.
•
The ptime specifies the packetization time the gateway expects to
receive. The gateway always uses the ptime requested by the remote
side for sending RTP packets.
•
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.
•
For G.729, it's also possible to select silence suppression without
adaptations.
•
If the coder G.729 is selected and silence suppression is disabled (for
this coder), the gateway includes the string 'annexb=no' in the SDP of the
relevant SIP messages. If silence suppression is enabled or 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).
•
For an explanation on V.152 support (and implementation of T.38 and
VBD coders), refer to 'Supporting V.152 Implementation' on page
331 .
•
A pre-defined table can be configured to provide a set of rules for
automatic AMR rate change. The decision for the change is based upon
packet loss rate. To obtain more information about this option, contact
AudioCodes.
Table 5-10: Supported Coders
Coder Name Packetization Time Rate Payload Type Silence Suppression
G.711 A-law
[g711Alaw64k]
10, 20 (default), 30,
40, 50, 60, 80, 100,
120 Always 64 Always 8 Disable [0]
Enable [1]
G.711
µ
-law
[g711Ulaw64k]
10, 20 (default), 30,
40, 50, 60, 80, 100,
120 Always 64 Always 0 Disable [0]
Enable [1]
G.729
[g729]
10, 20 (default), 30,
40, 50, 60, 80, 100 Always 8 Always 18 Disable [0]
Enable [1]
Enable w/o
Adaptations [2]
G.723.1
[g7231]
30 (default), 60, 90 5.3 [0], 6.3 [1]
(default) Always 4 Disable [0]
Enable [1]
G.726
[g726]
10, 20 (default), 30,
40, 50, 60, 80, 100,
120 16 [0], 24 [1],
32 [2] (default)
40 [3] Dynamic (0-120) Disable [0]
Enable [1]
G.711A-law_VBD
[g711AlawVbd]
10, 20 (default), 30,
40, 50, 60, 80, 100,
120 Always 64 Dynamic (0-120) N/A