AudioCodes Mediant 600 - Page 308

SIP User's Manual 308 Document #: LTRT-83310
Mediant 600 & Mediant 1000
8. After the call is disconnected by the PSAP, the PSAP sends a SIP BYE to the FXS
device, and the FXS device reverses the polarity of the line toward the tandem switch.
The following parameters need to be configured:

EnableDIDWink = 1

EnableReversalPolarity = 1

PolarityReversalType = 1

FlashHookPeriod = 500 (for 500 msec "hookflash" mid-call Wink)

WinkTime = 250 (for 250 msec signalling Wink generated by the FXS device after it
detects the line seizure)

EnableTransfer = 1 (for call transfer)

LineTransferMode = 1 (for call transfer)

WaitforDialTime = 1000 (for call transfer)

SwapTEl2IPCalled&CallingNumbers = 1

DTMFDetectorEnable = 0

MFR1DetectorEnable = 1

DelayBeforeDIDWink = 200 (for 200 msec) - can be configured in the range from 0
(default) to 1000.
Note:
Modification of the WinkTime and FlashHookPeriod parameters require a
device reset.
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 using 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:
Table 18-17: 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"