Instruction Manual

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 44 of 59
G723 Rate
This defines the encoding rate for G723 vocoder. Default setting is 6.3kbps.
iLBC Frame Size
This sets the iLBC size in 20ms or 30ms
iLBC Payload Type
This defines payload type for iLBC. Default value is 97. The valid range is between 96
and 127.
AAL2-G726-16 Payload
Type
Defines payload type for AAL2-G726-16. Default value is 100. Range is from 96 to
127.
AAL2-G726-24 Payload
Type
Defines payload type for AAL2-G726-24. Default value is 99. Range is from 96 to 127.
AAL2-G726-32 Payload
Type
Defines payload type for AAL2-G726-24. Default value is 104. Range is from 96 to
127.
AAL2-G726-40 Payload
Type
Defines payload type for AAL2-G726-40. Default value is 103. Range is from 96 to
127.
G729E Payload Type
Defines payload type for G729E. Default value is 102. Range is from 96 to 127
VAD
Default is No. VAD allows detecting the absence of audio and conserves bandwidth by
preventing the transmission of “silent packets” over the network.
Symmetric RTP
Default is No. When set to “Yes” the device will change the destination to send RTP
packets to the source IP address and port of the inbound RTP packet last received by
the device.
Fax Mode
T.38 (Auto Detect) FoIP by default, or fax Pass-Through (must use PCMU/PCMA)
Fax Tone Detection Mode
Default is Callee. This decides whether Caller or Callee sends out the re-invite for T.38
or Fax Pass-Through.
Jitter Buffer Type
Select either Fixed or Adaptive based on network conditions.
Jitter Buffer Length
Select Low, Medium, or High based on network conditions.
 High (initial 200ms, min 40ms, max 600ms) Note: not all vocoders can meet
the high requirement
 Medium (initial 100ms, min 20ms, max 200ms)
Low (initial 50ms, min 10ms, max 100ms)
SRTP Mode
Secure RTP protocol used for media transmission over VoIP. Disabled by default.
Other modes are: enabled but not forced & enabled and forced.
SLIC Setting
Dependent on standard phone type (and location).
Called ID Scheme
Bellcore/Telcordia, ETSI-FSK, ETSI-DTMF, SIN 227 – BT, & NTT Japan
Caller ID TX Level (dB)
A value of level for Caller ID information sent by a FXS port to phone connected to it.
(-40 – 0dB. Default -20dB)
Polarity Reversal
If set to “Yes”, polarity will be reversed upon call establishment and termination.
Default is No.
Loop Current Disconnect
Set it to “Yes” of the traditional PBX you are using with HT503 uses this method for
signaling call termination. Default is No.
Loop Current Disconnect
A configurable period of time in which the FXS port will drop off voltage on the line to