Yeastar Technology S-Series Administrator's Guide

S-Series IP PBX Administrator Guide
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 Require: include “timer” value in Require header
 Forced: include “timer” value in both "Supported" and "Required"
header.
The default is Supported.
Session-expires
The max refresh interval in seconds.
Session-minse
The min refresh interval in seconds, it must not be less than 90.
QOS
QoS (Quality of Service) is a major issue in VoIP implementations. The issue is how to guarantee
that packet traffic for a voice or other media connection will not be delayed or dropped due
interference from other lower priority traffic. When the network capacity is insufficient, QoS could
provide priority to users by setting the value.
Figure 9-6 QOS
T.38
Figure 9-7 T.38
 Re-invite SDP Not Add T.38 Attribute
If set to yes, SDP in re-invite packet will not add T.38 attributes.
 Error Correction
This sets the Error Correction Mode (ECM) for the Fax.
 T.38 Max BitRate
T38 Max Bit Rate.

Yeastar Technology S-Series Specifications

General

Brand	Yeastar Technology
Model	S-Series
Category	PBX
Language	English