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.
Maximum retransmission interval for non-INVITE requests and INVITE
responses.
Set the SIP Timer D. Default is 0.
Sets the payload type for DTMF using RFC2833.
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.
DTMF-RELAY Tag
Respect SIP INFO
Default is No. If set to No, the DTMF-relay tag in Accept Header is always
added in outbound INVITE. If set to Yes, it depends on if SIP INFO is chosen
in Preferred DTMF Method.
Default is No. If set to yes, use above DTMF order without negotiation
Send DTMF via RTP (According to RFC 2833).
Send DTMF via SIP INFO message.
Default is No. If set to yes, flash will be sent as DTMF event.
Default is Yes. (If Yes, call features using star codes will be supported locally)
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.
Configure the delay time for offhook auto-dial function. Range is 0-60 seconds,