Softswitch & VOIP Billing
||DID / WEB / SMS / ANI / GSM modem.
||Passive hangup / ontinous call / GRPS obile
/ DID without DTMF / artial call back / private DID
call back /
register or top up with SMS*
Call back could got better call quality than normal
VOIP call especially when network is not good. And call
back could save much cost compared with normal pstn long
DID callback is the most convinent way to use callback service.
To provide DID callback service you need to prepare a DID
with multiple channels.
SetuBilling's DID callback service works in the following
Customer dial your DID callback access number with his telephone.
He will hear ringback tone or music.
After he hangs up the call SetuBilling will call him back
and ring his phone.
Customer answers the phone call and input destination phone
number with DTMF
SetuBilling will call the destination phone number.
SetuBilling will link the two calls together.
Caller and Callee will be able to talk now.
GSM Modem Callback
GSM modem callback could be used as the alternative way
if not easy to get local DID. It works the same way as DID
callback. You need to prepare few GSM modems as the access
SMS call back is not convinent. It could act as the optional
choice to triger callback. Like GSM modem callback, you
need to prepare few GSM modems in your local area as the
For example, customer sends the following short message
to your GSM modem
u.123 p.456 s.789 d.433
The sms will triger the callback service with account code
456 and password 433.
The phone number 789 will be called and ring first.
After phone 789 answered the call, phone number 433 will
be called and ring.
phone number 433 answer the call.
phone number 789 and 433 will be able to talk now.
After the call finished, cost will be billed to account
Customer could also trigger call back from web. After login
from member entry, input his phone number and destination
phone number and then click submit is ok.
Softphone Callback or API Callack
You could integrate SetuBilling callback trigger API into
your PC softwares. Please check our sample API.
GPRS mobile phone Callback
This works with a kind of cheap mobile phone made in China.
The mobile phone is a normal one with call back feature
added. It is simple and easy to use. The only draw back
is that the mobile phone needs to connect internet with
DID Callback without DTMF
Sounds strange but it are TRUE. SetuBilling calls it [Three
points in one line].
With this creative idea customers need to map DID numbers
to real callee phone number first. And then, if the customer
A calls DID number aa, SetuBilling will know he want to
call phone number B in fact. SetuBilling will call caller
number and callee number and then bridge them togather.
Partial Calling card
This is the newest feature we added to SetuBilling. Although
you see [calling card] characters there it is call back
in fact. With this creative idea we could use normal or
grey routes for call back Leg A. DTMF is not a problem
To say simple, with this mode SetuBilling got the callee
phone number but does not answer the call. The left thing
is to call caller number and callee number and then bridge