Use shang332 Connect PBX to Voip

The flow picture below shows how to turn your traditional PBX System to a Viop System.If you want to make your old PBX connect into Voip world, you should find out why you transfer into Voip and what kind of ports available.If there are FXS ports left, connect them to our product of FXO gateway Shang332 fxs. If there are FXO ports left, connect them to our product of FXO gateway Shang332 fxo. If there are E1 ports left, connect them to our product of zhou500 E1 gateway.
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