It is a device capturing and controling all the signals, which are being created by the whole system, especially the made and received phone call signals. The device is mostly used for connecting regular phone system with the Internet and backwards.
Hi
I am shumon from Dhaka , my dalier is SHINETELL which one is btcl route if u r interested pls knock me price is good enough and attaractive.
Thanks
hamid
shinetell