Grandstream Networks HT818 Administration Manual page 36

Layer 3 QoS Defines Diff-Serv values for SIP and RTP. Defaults are:
SIP Diff-Serv: 24 | RTP Diff-Serv: 46
Local SIP Port Defines local port to use by the HT818 for listening and transmitting SIP packets. Default
value for FXS 1 is 5060 and 5062 for FXS 2.
Local RTP Port Defines the local RTP-RTCP port pair the HT818 will listen and transmit. It is the HT818
RTP port for channel 0.
The default value for FXS port is 5004
Use Random SIP Controls whether to use configured or random SIP ports. This is usually necessary when
Port multiple HT818 are behind the same NAT. Default is No.
Use Random Controls whether to use configured or random RTP ports. This is usually necessary when
RTP Port multiple HT818 are behind the same NAT. Default is No.
Enable RTCP Allows users to enable RTCP. The default setting is "Yes".
Hold Target
Allows user to hold or not hold the phone call before referring. The default setting is
Before Refer "Yes".
Refer-To Use Includes target's "Contact" header information in "Refer-To" header when using attended
Target Contact transfer. Default is No.
Transfer on If set to "Yes", when the phone hangs up as the conference initiator, the conference call
Conference Hang- will be transferred to the other parties so that other parties will remain in the conference
up call.
Default setting is No.
Disable Bellcore Gives the users the possibility of making conference calls by pressing "Flash" key, when
Style 3-Way it's enabled by dialing *23 +second callee number. Default is No
Conference
Remove OBP from Removes outbound proxy info in "Route" header when sending SIP packets. Default is No.
Route Header
Support SIP Includes "SIP Instance ID" attribute to "Contact" header in REGISTER request as defined
Instance ID in IETF SIP outbound draft. Default is No.
Validate Incoming Validates incoming SIP messages. Default is No.
SIP Messages
Check SIP User ID Checks SIP User ID in the Request URI of incoming INVITE; if it doesn't match the HT818
for Incoming SIP User ID, the call will be rejected. Direct IP calling will also be disabled.
INVITE Default is No.
HT818 Administration Guide
Version 1.0.9.3
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