Grandstream Networks GXP1625 Administration Guide

GXP16XX Administration Guide
Version 1.0.4.100
P a g e | 34
Validate Certification
Chain
Choose whether certification chain will be validated when TLS/TCP mode is
used.
Validate Incoming
Messages
Choose whether the incoming messages will be validated or not. The default
setting is “No”.
Check SIP User ID for
incoming INVITE
If set to “Yes”, SIP User ID will be checked in the Request URI of the incoming
INVITE. If it doesn’t match the phone’s SIP User ID, the call will be rejected. The
default setting is “No”.
Accept Incoming SIP
from Proxy Only
When set to “Yes”, the SIP address of the Request URL in the incoming SIP
message will be checked. If it doesn’t match the SIP server address of the
account, the call will be rejected. The default setting is “No”.
Authenticate
Incoming INVITE
If set to “Yes”, the phone will challenge the incoming INVITE for authentication
with SIP 401 Unauthorized response. Default setting is “No”.
Account x  Audio Settings
Send DTMF
This parameter specifies the mechanism to transmit DTMF digits.
There are 3 supported modes:
• 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 use SIP info to carry DTMF. The defect of this mode is that
it's easily to cause desynchronized of DTMF and media packet for the
reason the SIP and RTP are transmitted respectively. Default setting is
"RFC2833"
DTMF Payload Type
Configures the payload type for DTMF using RFC2833. Default value is 101.
Preferred Vocoder
7 different vocoder types are supported on the phone, including G.711 U-law
(PCMU), G.711 A-law (PCMA), G.723.1, G.729A/B, G.722 (wide band), iLBC,
and G726-32. Users can configure vocoders in a preference list that is included
with the same preference order in SDP message.
Use First Matching
Vocoder in 200OK
SDP
When set to “Yes”, the device will use the first matching vocoder in the received
200OK SDP as the codec. The default setting is “No”.
Disable Multiple m
line in SDP
If enabled, the phone always responses 1 m line in SDP regardless multiple m
lines are offered.
SRTP Mode
Enables the SRTP mode based on your selection.
Default setting is “Disabled”.
Symmetric RTP
Defines whether symmetric RTP is supported or not.
Default setting is “No”.

Grandstream Networks GXP1625 Specifications

General

Brand	Grandstream Networks
Model	GXP1625
Category	IP Phone
Language	English