AudioCodes MediaPack 114 Uživatelský manuál stáhnout pdf (Strana 275)

Version 5.6 275 November 2008

SIP User's Manual 4. ini File Configuration

Parameter Description

includes up to five groups of coders (consisting of up to five

coders per group) that can be associated with IP or Tel profiles

('Coder Group Settings' page in the Web interface -- refer to

''Coder Group Settings'' on page 170).

The first group of coders

(indices 0 through 4) is the default coder list and default coder

group. The format of this parameter is as follows:

[CoderName]

FORMAT CoderName_Index = CoderName_Type,

CoderName_PacketInterval, CoderName_rate,

CoderName_PayloadType, CoderName_Sce;

[\CoderName]

Where,

 Type = Coder name

 PacketInterval = Packetization time

 Rate = Packetization rate

 PayloadType = Payload type

 Sce = Silence suppression mode

For example:

[CoderName]

CoderName 0 = g711Alaw64k, 20,,,0;

CoderName 1 = g726, $$, 3, 38, 0;

CoderName 2 = g729, 40, 255, 255, 1;

[\CoderName]

Notes:

 This parameter can include up to 25 indices (i.e., five coders

per five coder groups).

 The coder name is case-sensitive.

 If silence suppression is not defined for a specific coder, the

value defined by the parameter EnableSilenceCompression is

used.

 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.

 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.

 If the coder 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).

 For a list of supported coders, refer to ''Coders'' on page 123.

 To configure the 'Coders' table in the Web interface, refer to

''Coders'' on page 123.

 For a description of using ini file table parameters, refer to

''Structure of ini File Table Parameters'' on page 233.

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