Grandstream Networks GXV3350 Administration Guide

GXV3350 Administration Guide
Version 1.0.3.27
P a g e | 45
Account/Codec Settings
Preferred Vocoder
Preferred Vocoder
Lists the available and enabled Audio codecs for this account. Users can
enable the specific audio codecs by moving them to the selected box and
set them with a priority order from top to bottom.
This configuration will be included with the same preference order in the
SIP SDP message.
Codec Negotiation
Priority
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”.
Use First Matching
Vocoder in 200OK SDP
Configures the phone to use the first matching codec in the 200OK
message. The default value is 0.
ILBC Frame Size
Sets the ILBC (Internet Low Bitrate Codec) frame size if ILBC is used.
Users can select it from 20ms or 30ms. The default setting is 30ms.
G726-32 ITU Payload
Configures G726-32 payload type for ITU packing mode. Payload 2 is static
and payload dynamic is dynamic. The default setting is “2”.
G726-32 Dynamic PT
Specifies the G726-32 payload type, and the valid range is 96 to 126. The
default setting is “126”.
Opus Payload Type
Defines the desired value (96-126) for the payload type of the Opus codec.
The default value is 123.
DTMF
Specifies the mechanism to transmit DTMF (Dual Tone Multi-Frequency)
signals.
There are 3 supported modes: in audio, RFC2833, or SIP INFO.
• In audio, which means DTMF is combined in the audio signal (not very
reliable with low-bit-rate codecs);
• RFC2833, which means to specify DTMF with RTP packet. Users could
know the packet is DTMF in the RTP header as well as the type of DTMF.
• SIP INFO, which uses SIP INFO to carry DTMF. The defect of this mode
is that it's easily to cause desynchronized of DTMF and media packet if the
SIP and RTP messages are required to transmitted respectively.
The default setting is "RFC2833".
DTMF Payload Type
Configures the RTP payload type that indicates the transmitted packet
contains DTMF digits. Valid range is from 96 to 126. Default value is 101.
Enable Audio RED with
FEC
If set to "Yes", FEC will be enabled for audio call.
The default setting is "No".
Audio FEC Payload Type
Configures audio FEC payload type. The valid range is from 96 to 126.
The default value is 121.

Grandstream Networks GXV3350 Specifications

General

Brand	Grandstream Networks
Model	GXV3350
Category	Telephone
Language	English