Version 6.2
423
February 2011
SIP User's Manual
8. IP Telephony Capabilities
Typically, the MF spills are sent from the E911 tandem switch to the PSAP, as shown in
the table below:
Table
8-3: Dialed MF Digits Sent to PSAP
Digits of Calling Number
Dialed MF Digits
8 digits "nnnnnnnn" (ANI)
"KPnnnnnnnnST"
12 digits "nnnnnnnnnnnn" (ANI)
"KPnnnnnnnnnnnnSTP"
12 digits ANI and 10 digits PANI
"KPnnnnnnnnnnnnSTKPmmmmmmmmmmST"
two digits "nn"
"KPnnSTP"
The MF KP, ST, and STP digits are mapped as follows:
* for KP
# for ST
B for STP
For example, if ANI and PANI are received, the SIP INVITE contains the following From
header:
From: <sip:*nnnnnnnnnnnn#*mmmmmmmmmm#@10.2.3.4>;tag=1c14
Note:
It is possible to remove the * and # characters, using the device's number
manipulation rules.
If the device receives the SIP INFO message below, it then generates a "hookflash" mid-
call Wink signal:
INFO sip:[email protected]:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.13.2:5060
From: port1vega1 <sip:[email protected]:5060>
To: <sip:[email protected]:5060>;tag=132878796-
1040067870294
Call-ID: [email protected]
CSeq:2 INFO
Content-Type: application/broadsoft
Content-Length: 17
event flashhook
Содержание Mediant 800 MSBG
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