Grandstream Networks HT503 User Manual

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HT503 User Manual
Payload Type
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.
Crypto Life Time
Default is Enabled. Allows user to enable or disable Crypto life time when

Grandstream Networks HT503 Specifications

General

Brand	Grandstream Networks
Model	HT503
Category	Telephone Accessories
Language	English