Who provides voltage?

[AnthonyHardy]

We have incoming analog DID's and I am trying to figure out how they work (we're changing to an asterisk phone system). Does the analog DID basically act like an analog phone connected to us? I know that when you dial one of our DIDs from the outside world you can hear the telco using dtmf to enter the four digits of the DID.

Here's the config if it helps:

DES DID
TN 002 0 00 01
TYPE DID
CDEN 8D
CUST 0
XTRK EXUT
FWTM NO
TIMP 600
BIMP 3COM
AUTO_BIMP NO
TRK ANLG
NCOS 3
RTMB 0 4
NITE
SIGL LDR
STRI WNK
SUPN YES
AST NO
IAPG 0
CLS UNR DTN WTA LPR APN THFD
P10 NTC
TKID 3687600
AACR NO
DATE NO DATE

 

[PERRYPJ]

The DID circuit coming from your Vendor is a dry cable pair, the switch provides Battery on one side of the line and Ground on the other side.
This is why you can go to the RJ and place your Testset across TIP and RING with Telco lifted and dial into the switch.

OLD ROLMEN WORKING ON NORTELS AND AVAYA