AudioCodes Mediant 800B User Manual page 366

The outgoing SIP INVITE message contains the following headers:
INVITE sip:Line@DomainName
From: <sip:*81977820#@sipgw>;tag=1c143
To: <sip:Line@DomainName>
Where:

Line = as configured in the Endpoint Phone Number Table

SipGtw = configured by the SIPGatewayName parameter

From header/user part = calling party number as received from the MF spill
The ANI and the pseudo-ANI numbers are sent to the PSAP either in the From and/or P-
AssertedID SIP header.
Typically, the MF spills are sent from the E911 tandem switch to the PSAP, as shown in
the table below:
Digits of Calling Number
8 digits "nnnnnnnn" (ANI)
12 digits "nnnnnnnnnnnn" (ANI)
12 digits ANI and 10 digits PANI
two digits "nn"
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:
If the device receives the SIP INFO message below, it then generates a "hookflash" mid-
call Wink signal:
INFO sip:4505656002@192.168.13.40:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.13.2:5060
From: port1vega1 <sip:06@192.168.13.2:5060>
To: <sip:4505656002@192.168.13.40:5060>;tag=132878796-
1040067870294
Call-ID: 0010-0016-D69A7DA8-1@192.168.13.2
CSeq:2 INFO
Content-Type: application/broadsoft
Content-Length: 17
event flashhook
User's Manual
Table ‎ 2 5-1: Dialed MF Digits Sent to PSAP
It is possible to remove the * and # characters, using the device's number
manipulation rules.
Dialed MF Digits
"KPnnnnnnnnST"
"KPnnnnnnnnnnnnSTP"
"KPnnnnnnnnnnnnSTKPmmmmmmmmmmST"
"KPnnSTP"
366
Mediant 800B GW & E-SBC
Document #: LTRT-10274