buzzbox SIP Trunking is for VoIP enabled companies with their own PBX equipment, looking for high quality international trunking at the best possible price.
We have a single rate deck - Platinum - meaning all calls are routed over tier 1 providers for exceptional clarity and incredibly high ASR.
We authenticate your equipment on three factors: username, password and caller ID. This means that all calls must be sent from a valid caller ID registered on our switches. You can choose from the popular G711.A and G729 codecs. Call 0330 122 2230 to discuss pricing.