Grandstream Networks DP720 Administration Manual page 37

Sends periodic "SUBSCRIBE" requests (depends on "Register Expiration" parameter) for
SUBSCRIBE for MWI
message waiting indication service. Default is No.
Appends "100rel" attribute to the "required" header of the initial signaling messages. Default
Enable 100rel
is No.
TEL URI Indicates E.164 number in "From" header by adding "User=Phone" parameter or using "Tel:"
in SIP packets, if the base has an assigned PSTN Number.



Please consult your carrier before changing this parameter. Default is Disabled.
Do Not Escape '#'
Replaces "#" by "%23" when sending SIP packets. Default is No.
as %23 in SIP URI
Disable Multiple m
Sends only one m line in SDP, regardless of how many m fields are in the incoming SDP.
Line in SDP
Default is No.
Use Privacy Header Adds "Privacy" header if special feature is set to "Default", and not "CBCOM".
Use Adds "PPI" header if special feature is set to "Default", and not "CBCOM".
P-Preferred-Identity
Header
SIP Settings - Session Timer
Enables periodic refresh of SIP session via a SIP request (UPDATE, or re-INVITE). When
Session Expiration
the session interval expires and there is no refresh via an UPDATE or re-INVITE message,
the session will be terminated.
Session Expiration is the time (in seconds) at which the session is considered timed out, if
no successful session refresh transaction occurs beforehand. Default is 180 seconds.
Min-SE Defines Minimum session expiration (in seconds). Default is 90 seconds.
Caller Request Timer Uses session timer when making outbound calls if remote party supports it. Default is No.
Callee Request Timer Uses session timer when receiving inbound calls with session timer request. Default is No.
Uses session timer even if the remote party does not support this feature. Selecting "No" will
Force Timer
enable session timer only when the remote party supports it. Default is No.
To turn off Session Timer, select "No" for Caller Request Timer, Callee Request Timer, and
Force Timer.
Disabled: Will use "SIP User ID" information in the Request-Line and "From" header.
User=Phone: "User=Phone" parameter will be attached to the Request-Line and
"From" header in the SIP request to indicate the E.164 number. If set to "Enable".
Enabled: "Tel:" will be used instead of "sip:" in the SIP request.
DP750/DP720 Administration Guide
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