Grandstream Networks GXW4248 User Manual

FIRMWARE 1.0.3.4 GXW4248 USER MANUAL PAGE 42 OF 54
Preferred DTMF
method (in listed
order)
The GXW4248 supports up to 3 different DTMF methods including in-audio, via RTP
(RFC2833) and via Sip Info. The user can configure DTMF method in a priority list.
Disable DTMF
Negotiation
Default is No. If set to yes, use above DTMF order without negotiation
DTMF Payload
Type
Sets the payload type for DTMF using RFC2833.
Preferred Vocoder
The GXW4248 supports up to 5 different Vocoder types including G.711 A-/U-law, G.726
(Supports bit rates 16, 24, 32 and 40), G.723.1, G.729A/B, iLBC
. The user can configure
Vocoders in a preference list that will be included with the same preference order in SDP
message. The first Vocoder is entered by choosing the appropriate option
in “Choice 1”. The
last Vocoder is entered by choosing the appropriate option in “Choice 8”.
Voice Frames per
TX
Number of the frame size when it transmits. Default is 2, from 1 -4 for G711/G726/G729
G723 Rate
Defines the encoding rate for G.723 vocoder. By default, 6.3kbps rate is chosen.
G726-32 Packing
Mode
Choose the packing mode for G726-32
iLBC Frame Size
Sets the iLBC frame size in 20ms or 30ms
iLBC Payload type
Default value is 97. Defines payload type for iLBC. The valid range is between 96 and 127.
AAL2-G726-16
Payload type
Default value is 100. Range is from 96 to 127.
AAL2-G726-24
Payload type
Default value is 99. Range is from 96 to 127.
AAL2-G726-32
Payload type
Default value is 104. Range is from 96 to 127.
AAL2-G726-40
Payload type
Default value is 103. Range is from 96 to 127.
Use First
Matching Vocoder
in 200OK SDP
Default is No. If set to “Yes”, device will include only the first match vocoder in its 200OK
response, otherwise it will include all match vocoders in same order received in INVITE.

Grandstream Networks GXW4248 Specifications

General

Brand	Grandstream Networks
Model	GXW4248
Category	Gateway
Language	English