One Stage callback service configuration on Voipswitch -- 5

I am expert on voipswitch configuration. I have done callback configuration on voipswitch. you can check my previous voipswitch project as well.

We are expert in voip and voice configuration. voip gateways and all, any type of help u need, we are here for u .

I have strong experience in that....I can do it. lets discuss over chat looking forward to hear from you.

I am a voipswitch and voip expert, using and developing custom scenarios for voipswitch for last 5 years. I can complete the job in 5 working days.