Grandstream HT502 User Manual - Manual (Page 43)

FIRMWARE VERSION 1.0.14.1 HT502 USER MANUAL Page 41 of 54
Support SIP Instance ID Default is Yes. If set to Yes, the contact header in REGISTER request will contain SIP
Instance ID as defined in IETF SIP Outbound draft.
Validate incoming SIP
message
Default is No. If set to yes all incoming SIP messages will be strictly validated
according to RFC rules. If message will not pass validation process, call will be
rejected.
Check SIP User ID for
incoming INVITE
Default is No. Check the incoming SIP User ID in Request URI. If they don’t match, the
call will be rejected. If this option is enabled, the device will not be able to make direct
IP calls.
Authenticate incoming
INVITE
Default is No. If set to Yes, device will challenge the incoming INVITE for the
Authenticate ID and Password with 401 Unauthorized.
Allow Incoming SIP
Messages from SIP
Proxy Only
Default is No. Check the incoming SIP messages. If they don’t come from the SIP
proxy, they will be rejected. If this option is enabled, the device will not be able to make
direct IP calls.
Use Privacy Header If set to Default, it will only add Privacy or PPI header when special feature is not
Telkom SA or CBCOM.
Use P-Preferred-
Identity Header
If set to Default, it will only add Privacy or PPI header when special feature is not
Telkom SA or CBCOM.
SIP T1 Timeout T1 is an estimate of the round-trip time between the client and server transactions.
If the network latency is high, select larger value for more reliable usage.
SIP T2 Interval Maximum retransmission interval for non-INVITE requests and INVITE responses.
SIP Timer D Set the SIP Timer D. Default is 0.
DTMF Payload Type Sets the payload type for DTMF using RFC2833.
Preferred DTMF method The HT502 supports up to 3 different DTMF methods including in-audio, via RTP
(RFC2833) and via Sip Info. The user can configure DTMF method in a priority list.
Disable DTMF
Negotiation
Default is No. If set to yes, use above DTMF order without negotiation
DTMF via RFC2833 Send DTMF via RTP (According to RFC 2833).
DTMF via SIP INFO Send DTMF via SIP INFO message.
Send Flash Event Default is No. If set to yes, flash will be sent as DTMF event.
Enable Call Features Default is Yes. (If Yes, call features using star codes will be supported locally)
Offhook Auto-Dial This parameter allows users to configure a User ID or extension number that is
automatically dialed when off-hook. Only the user part of a SIP address needs is
entered here. The HT502 will automatically append the “@” and the host portion of the
corresponding SIP address.
Offhook Auto-Dial
Delay
Configure the delay time for offhook auto-dial function. Range is 0-60 seconds,
default is 0.
Proxy-Require SIP Extension to notify SIP server that the unit is behind the NAT/Firewall.
Use NAT IP NAT IP address used in SIP/SDP message. Default is blank.