HT812/HT814 Administration Guide
server transactions. For example, the HT812/HT814 will attempt to send a request to a
SIP server. The time it takes between sending out the request to the point of getting a
response is the SIP T1 timer. If no response is received the timeout is increased to (2*T1)
and then (4*T1). Request re-transmit retries would continue until a maximum amount of
time defined by T2. Default is 0.5 seconds.
Identifies maximum retransmission interval for non-INVITE requests and INVITE
responses. Retransmitting and doubling of T1 continues until it reaches T2 value. Default
is 4 seconds.
Configure the SIP Timer D defined in RFC3261. 0 - 64 seconds. Default 0
Defines payload type for DTMF using RFC2833.
Preferred DTMF
method (in order)
Sorts DTMF methods (in-audio, via RTP (RFC2833) or via SIP INFO) by priority.
Uses above DTMF order without negotiation. Default is No.
Generate
Continuous
RFC2833 Events
When enabled the RFC2833 events are generated until key is released. Default is No.
Default is No. If set to yes, flash will be sent as DTMF event.
Overrides the default settings for call control when both channels are in use
Enables do not disturb, call forward and other call features via the local feature codes on
the base. Otherwise, ITSP feature codes can be used.
Default is Yes.
Configures a user ID or extension number that is automatically dialed when off-hook.
Only the user part of a SIP address needs to be entered. The HT812/HT814 will
automatically append the “@” and the host portion of the corresponding SIP address.
Specifies the auto-dial delay after off hook.
Determines a SIP Extension to notify the SIP server that the HT812/HT814 is behind a
NAT/Firewall.
Defines NAT IP address used in SIP/SDP messages. It should only be used if required
by ITSP.