Grandstream Networks HT818 Administration Manual page 48

Local RTP Port
Use Random SIP Port
Use Random RTP Port
Enable RTCP
Hold Target Before
Refer
Refer-To Use Target
Contact
Transfer on Conference
Hang-up
Disable Bellcore Style 3-
Way Conference
Remove OBP from
Route Header
Support SIP Instance ID
Validate Incoming SIP
Messages
Check SIP User ID for
Incoming INVITE
Authenticate Incoming
INVITE
Authenticate server
certificate domain
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
Controls whether to use configured or random SIP ports. This is usually necessary
when multiple HT818 are behind the same NAT. Default is No.
Controls whether to use configured or random RTP ports. This is usually
necessary when multiple HT818 are behind the same NAT. Default is No.
Allows users to enable RTCP. The default setting is "Yes".
Allows user to hold or not hold the phone call before referring. The default setting
is "Yes".
Includes target's "Contact" header information in "Refer-To" header when using
attended transfer. Default is No.
If set to "Yes", when the phone hangs up as the conference initiator, the conference
call will be transferred to the other parties so that other parties will remain in the
conference call. Default setting is No.
Gives the users the possibility of making conference calls by pressing "Flash" key,
when it's enabled by dialing *23 +second callee number. Default is No
Removes outbound proxy info in "Route" header when sending SIP packets. Default
is No.
Includes "SIP Instance ID" attribute to "Contact" header in REGISTER request as
defined in IETF SIP outbound draft. Default is No.
Specifies if the ATA will check the incoming SIP messages caller ID and CSeq
headers. If the message does not include the headers, it will be rejected. Default
is No.
Checks SIP User ID in the Request URI of incoming INVITE; if it doesn't match the
HT818 SIP User ID, the call will be rejected. Direct IP calling will also be disabled.
Default is No.
Challenges the incoming INVITE for authentication with SIP 401 Unauthorized
message.
Default is No.
Configures whether to validate the domain certificate when download the
firmware/config file. If it is set to "Yes", the phone will download the firmware/config
file only from the legitimate server. The default setting is "No".
HT818 Administration Guide
Version 1.0.27.2
P a g e | 47