Praflik,
Do you need any addtional information?
Joel_Sisko
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DNIS/DID/ANI
What are the differences between DNIS and DID and how does DNIS/DID and ANI work?
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Answers
Joel,
Actually I was looking for a more technical answer.
Here are some additional questions:
How does the telco signal the PBX with DID/DNIS/ANI on a PRI vs. on a T1? Does it use the D-Channel on the PRI and DTMF on the T1?
On a PRI can I use DNIS to route incoming calls or do I need DID also on the PRI? If I use DID on a PRI does than mean certain B-channels will be dial-in only or will all 23 channels be two way.
Here's an additional question, explain loop start and ground start.
Thanks.
Praflik,
First, based on your all your questions I would recommend Netwton's Telecom Dictionary, a 1,000 pages strong of Telecom definitions.
How the telco's signal the PBX depends upon:
1. Circuit type: Analog verses Digital
2. If digital (T1/PRI), then emulation type..Ground start...Loop start...E&M (Types I,II,III,IV or V)..etc...
3. Then, supported PBX features: Wink start, immeadiate start, polarity reversal, tone detection
Basically what I am saying is that I could write a book just on half of your question (which I am, coming out in Q3 this year)
To adrress the call routing, if your PBX can support DNIS (usually coulped with ACD software), then that is all you need to route to a designated agent or group.
Yes the ANI/DNIS is routed via the D-Channel on PRI.
Yes the ANI can be sent via DTMF over the T1.
To help clarify, think of DID as a private line; think of DNIS as a service on all lines.
Hope this helps.
Kindest regards,
Joel_Sisko
Praflik,
Forgot to adress the Loop start verses Ground start...(going to be brief)
POTS or Plain Old Telephone Service is an analog two wire circuit that uses -48vDC to supply talk battery. In a loop start circuit, the telco detects that when you take your phone off hook it completes the circuit causing current to flow in the circuit (the circuit between you and the telco is physically a loop). So Loop start means when you complete the loop.
In a ground start circuit, you place one side of the circuit to ground electircally for brief period of time, the telco detects this and this starts the circuit.
Kindest regards,
Joel_Sisko
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by: Joel_SiskoPosted on 2005-12-27 at 15:26:26ID: 15559127
DNIS stands for Dialed Number Identification Service
DID stands for Direct Inward Dial
ANI stands for Automatic Number Identification.
DNIS allows the called party to see the number the caller dialed, i.e. Call Centers can tell if you dialed the 1 800 number for Visa verses American Express.
DID allows you to dial someone using a private phone system (PBX) and ringing their extenstion directly without being transferred by an operator.
ANI allows the called party to see you number you are dialing from (it is the digital equivalent of caller id on your home phone for businesses)
Kindest regards,
Joel_Sisko