This project is to create a rebtel.com kind of service and the implementation require asterisks customization and basic voip rating engine to bill for calls made on the network. there should be a full customer interface for adding call forwarding features like rebtel.com. also ability to to create smart conferencing. please review all rebtel.com features.
Example have been added to aid you through.

Quick Forwards

Some DIDs can be assigned to Quick Forwards functionality. When it is done each user can enter different number to be forwarded when he calls some DID.

Main advantage of this function is to use limited number of DIDs to let different users to call these DIDs and be forwarded to different numbers (which are assigned by users).

Example

We have several DIDs assigned to Quick Forwards functionality:

1111111111

2222222222
 
Now we have 2 users with such CallerIDs:

User A with CallerID 8888888888

User B with CallerID 9999999999
 
User A set such forwards:

From DID 1111111111 forward to 3333333333

From DID 2222222222 forward to 4444444444
 
User B set such forwards:

From DID 1111111111 forward to 5555555555

From DID 2222222222 forward to 6666666666


When User A dials DID 1111111111 his CallerID (888888888 is checked, user is recognized and call is automatically forwarded to number 3333333333

When User A dials DID 2222222222 his CallerID (888888888 is checked, user is recognized and call is automatically forwarded to number 4444444444


When User B dials DID 1111111111 his CallerID (9999999999) is checked, user is recognized and call is automatically forwarded to number 5555555555

When User B dials DID 2222222222 his CallerID (9999999999) is checked, user is recognized and call is automatically forwarded to number 6666666666
 
IMPORTANT: Correct CallerIDs should be set for users in order to recognize them. Only system admin can do that.

If system can't recognize the caller it asks to enter PIN number of the device.

If user is dialing DID which has not assigned Forward Number, user is asked to enter such number.
 
User can manipulate his Quick Forwards in his menu. He needs to login to GUI to change numbers.