Grandstream Networks GRP2601 Administration Manual page 43

Force INVITE
Account x → Codec Settings
Audio
Preferred Vocoder
(Choice 1 – 8)
Codec Negotiation
Priority
Use First Matching
Vocoder in 200OK SDP
iLBC Frame Size
iLBC Payload Type
G.726-32 Packing
Mode
G.726-32 Dynamic
Payload Type
Opus Payload Type
Send DTMF
The Session Timer can be refreshed using the INVITE method or the
UPDATE method. Select "Yes" to use the INVITE method to refresh the
session timer. The default setting is "No".
Multiple vocoder types are supported on the phone, the vocoders in the list
is a higher preference. Users can configure vocoders in a preference list that
is included with the same preference order in SDP message.
Configures the phone to use which codec sequence to negotiate as the
callee. When set to "Caller", the phone negotiates by SDP codec sequence
from received SIP Invite. When set to "Callee", the phone negotiates by audio
codec sequence on the phone. The default setting is "Callee".
When it is set to "Yes", the device will use the first matching vocoder in the
received 200OK SDP as the codec. The default setting is "No".
This option determines the iLBC packet frame size. Users can choose from
20ms and 30ms. The default setting is "30ms".
This option is used to specify iLBC payload type. Valid range is 96 to 127.
The default setting is "97".
Selects "ITU" or "IETF" for G726-32 packing mode.
The default setting is "ITU".
Specifies G.726-32 payload type. Valid range is 96 to 127. Default is 127.
Specifies OPUS payload type. Valid range is 96 to 127. Cannot be the same
as iLBC or DTMF Payload Type. Default value is 123.
This parameter specifies the mechanism to transmit DTMF digits. There are
3 supported modes:
•
In audio: DTMF is combined in the audio signal (not very reliable
with low-bit-rate codecs).
•
RFC2833 sends DTMF with RTP packet. Users can check the RTP
packet to see the DTMFs sent as well as the number pressed.
•
SIP INFO uses SIP INFO to carry DTMF.
Default setting is "RFC2833".
GRP260x Administration Guide
Version 1.0.1.18
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