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ADVANCED USER CONFIGURATION
To login to the Advan
password is case sen
ced U section 5.2.1. The
sitive default password for
is “admin”.
er configurati tion, but also advanced
such as SIP rsal Setting and other miscellaneous
d Use
ser Configuration page, please follow the instructions in
with a maximum length of 25 characters and the factory
Advanced User
Advanced Us
configuration
on includes not only the end user configura
configuration, Codec selection, NAT Trave
configuration.
Table 11: Advance r Configuration Page Definitions
Administr figure the “Advanced Settings” ator password. Only the administrator can con
Admin
Password
page. P s ity reasons after clicking update and as word field is purposely blank for secur
saved. The maximum password length is 25 characters.
This controls the silence suppression/VAD feature of the audio codec G.723 and G.729.
Silence
Suppression
If set to “Yes”, when silence is detected, a small quantity of VAD packets (instead of
audio p f no talking. If set to “No”, this feature is ackets) will be sent during the period o
disabled.
This field contains the number of voice frames to be transmitted in a single Ethernet
Voice Frames
per TX
packet (be advised the IS limit is based on the maximum size of Ethernet packet is 1500
byte (or 120kbps)).
When setting this value, be aware of the requested packet time (ptime, used in SDP
message) is a result of configuring this parameter. This parameter is associated with the
first codec in the above codec Preference List or the actual used payload type
negotiated between the 2 conversation parties at run time. e.g., if the first codec is
configured as G.723 and the “Voice Frames per TX” is set to 2, then the “ptime” value in
the SDP message of an INVITE request will be 60ms because each G.723 voice frame
contains 30ms of audio. Similarly, if this field is set to 2 and the first codec is G.729 or
G.711 or G.726, then the “ptime” value in the SDP message of an INVITE request will be
20ms.
If the configured voice frames per TX exceeds the maximum allowed value, the IP phone
will use and save the maximum allowed value for the corresponding first codec choice.
The maximum value for PCM is 10 (x10ms) frames; for G.726, it is 20 (x10ms) frames;
for G.723, it is 32 (x30ms) frames; for G.729/G.728, 64 (x10ms) and 64 (x2.5ms) frames
respectively.
Please be careful when editing these parameters. Adjusting these parameters will also
change the dynamic jitter buffer. The GXP-2000 has a patent dynamic jitter buffer
handling algorithm. The jitter buffer range is 20 ~ 200 ms.
Grandstream recommends using the default settings provided. Grandstream does not
recommend adjusting these parameters if you are an average user. Incorrect settings
will affect the voice quality. Please refer to the Codec FAQ at
http://www.grandstream.com/FAQ/FAQ-Codec.pdf for more technical detail.
This field defines the layer 3 QoS parameter. It is the value used for IP Precedence or
Layer 3 QoS
Diff-Serv or MPLS. Default value is 48.
This contains the value used for layer 2 VLAN tag. Default setting is blank.
Layer 2 QoS
Grandstream Networks, Inc. GXP-2000 Users Manual Page 20 of 33
Firmware 1.1.1.14 Last Updated: 12/2006