Grandstream Networks HT-286 User Manual
Page 19
Grandstream Networks, Inc.
HT–286 User Manual
Page 19 of 28
Firmware 1.1.0.31
Last Updated: 1/2009
iLBC frame size
This defines the size of the iLBC codec frame. The default setting is 20ms.
iLBC payload type
This defines the iLBC payload type. The default setting is 97. The valid
range is between 96 and 127.
Silence Suppression
This controls the silence suppression/VAD feature of G723 and G729. If set
to “Yes”, when a silence is detected, small quantity of VAD packets (instead
of audio packets) will be sent during the period of no talking. If set to “No”,
this feature is disabled.
Voice Frames per TX
This field contains the number of voice frames to be transmitted in a single
packet. When setting this value, the user should be aware of the requested
packet time (used in SDP message) as a result of configuring this parameter.
This parameter is associated with the first vocoder in the above vocoder
Preference List or the actual used payload type negotiated between the 2
conversation parties at run time.
e.g., if the first vocoder is configured as G723 and the “Voice Frames per TX”
is set to be 2, then the “ptime” value in the SDP message of an INVITE
request will be 60ms because each G723 voice frame contains 30ms of
audio. Similarly, if this field is set to be 2 and if the first vocoder chosen is
G729 or G711 or G726, 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 phone will use and save the maximum allowed value for the
corresponding first vocoder choice. The maximum value for PCM is
10(x10ms) frames; for G726, it is 20 (x10ms) frames; for G723, it is 32
(x30ms) frames; for G729/G728, 64 (x10ms) and 64 (x2.5ms) frames
respectively.
Fax Mode
T.38 (Auto Detect) FoIP by default, or Pass-Through (must use codec
PCMU/PCMA)
Layer 3 QoS
This field defines the layer 3 QoS parameter which can be the value used for
IP Precedence or Diff-Serv. Default value is 48
Layer 2 QoS
This setting includes two fields. The 802.1Q/VLAN Tag contains the value
used for layer 2 VLAN tag. Default setting is blank. And 802.1p priority value
contains the value of the priority value.
Allow incoming SIP
messages from SIP
proxy only
If set to “Yes”, the device will ignore any SIP message that does not come
from the IP address (Source IP in the IP header) that it is registered
to. Default is No.
Use DNS SRV
This parameter controls whether the IP phone supports the DNS SRV route
function.
User ID is phone
number
If the HandyTone-286 has an assigned PSTN telephone number, then this
field will be set to “Yes”. Otherwise, set it to “No”. If “Yes” is set, a
“user=phone” parameter will be attached to the “From” header in SIP request.
SIP Registration
This parameter controls whether the IP phone needs to send REGISTER
messages to the proxy server. The default setting is “Yes”.
Unregister On Reboot Default is No. If set to yes, the device will first send registration request to
remove previous bindings.