High availability and low cost SIP trunking

World beating SIP trunking rates

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.