Grandstream Networks HT812 Administration Manual page 29

RTP DSCP (Diff-Serv value in decimal, 0-63, default 46)
Local SIP Defines local port to use by the HT81x for listening and transmitting SIP packets. Default value for FXS 1 is
Port 5060 and 5062 for FXS 2.
Defines the local RTP-RTCP port pair the HT81x will listen and transmit. It is the HT81x RTP port for channel 0.
Local
RTP Port
The default value for FXS port is 5004
Controls whether to use configured or random SIP ports. This is usually necessary when multiple HT81x are
Use
behind the same NAT.
Random
SIP Port
Default is No.
Controls whether to use configured or random RTP ports. This is usually necessary when multiple HT81x are
Use
behind the same NAT.
Random
RTP Port
Default is No.
Enable
Allows users to enable RTCP. The default setting is "Yes".
RTCP
Hold
Allows user to hold or not hold the phone call before referring.
Target
Before
The default setting is Yes.
Refer
Refer-To
Includes target's "Contact" header information in "Refer-To" header when using attended transfer. Default
Use
Target is No.
Contact
Transfer
If set to "Yes", when the phone hangs up as the conference initiator, the conference call will be transferred to
on
the other parties so that other parties will remain in the conference call.
Conferen
ce Hang- Default setting is No.
up
Disable
Bellcore
Style 3- Gives the users the possibility of making conference calls by pressing "Flash" key, when it's enabled by dialing
Way *23 +second callee number. Default is No
Conferen
ce
Remove
Removes outbound proxy info in "Route" header when sending SIP packets.
OBP from
Route
Default is No.
Header
Support
Includes "SIP Instance ID" attribute to "Contact" header in REGISTER request as defined in IETF SIP outbound
SIP
draft.
Instance
Default is No.
ID
Validate
Incoming
SIP Validates incoming SIP messages. Default is No.
Message
s
Check Checks SIP User ID in the Request URI of incoming INVITE; if it doesn't match the HT81x SIP User ID, the call
SIP User will be rejected. Direct IP calling will also be disabled. Default is No.