ATL Telecom IP300S - Manual (Page 60)

IP SIP Phone v2 User’s Guide Mar. 2005
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10.7.4.1. Call Return
Configure the code to access soft-switch feature: “call return”. Whenever your dial string
matched the specified call-return string, IP SIP Phone will send the dial-string “as is” (with SIP
domain appended) to the SIP proxy server, such as “sip:*[email protected]”, and depends on
proxy server to keep the latest call history for each user to cover the phone off-line interval.
To configure the access code:
a. 【 】 Press FUNC 【 】 + # to activate menu.
b. Go to submenu “5. Preferences” / “7.Dial Plan / “4. Call Command” / “1. Call Return”.
c. Enter the call return access code to meet your local regulation.
C a l l R e t u r n : :
* 6 9
System default is “*69”.
Note: this is a server feature which replies on the SIP proxy server support. This differs
from the DSS “Call return”, which is a phone-set feature. If you map one of the DSS keys
(【F1】~ 【F8】) to “Call return” function, it will find the latest incoming calls from call history
of “Missed calls” and “Received calls” (which both are kept locally) then dial out the latest
incoming call number.
By default, 【F8】is mapped to “Call return”.
10.7.4.2. Anonymous Call (CLIP & CLIR)
System default is to enable Calling Line Identification Presentation, CLIP, all the time. You
may enable the Call Line Identification Restriction, CLIR on a per-call basis by using the call
command dial string. To enable CLIR on a per-call basis requires that the dial string sequence
(typically *67) that users enter on their dial-pad prior to dialing the phone number match the
specified CLIR string defined in the call command. Whenever the prefix is detected in dial string,
it will be stripped off from the original dial string and send to proxy with CLIR enabled. The SIP
INVITE message sent by IP SIP Phone would look like:
INVITE sip:[email protected] SIP/2.0
Via: SIP/2.0/UDP 192.168.3.253:5060;branch=abc7801
Via: SIP/2.0/UDP 192.168.3.51:5060
From: "Anonymous" <sip:[email protected]> ;tag=22516
To: <sip:[email protected]>
Call-ID: [email protected]
CSeq: 1 INVITE
Contact: "Anonymous" <sip:[email protected]:5060>
User-Agent: IP-Phone/2.0
Content-Length: 171
Content-Type: application/sdp