Here at M12 Solutions, we use a number of different SIP trunking providers. For customers with more complex requirements, those with international presence, or who require diverse carrier options, we can provide different SIP trunking services to the same premises or different sites.
Gamma
The largest UK SIP carrier, we've been working with Gamma since 2007.
TalkTalk
Talktalk bought a smaller SIP provider called Tipical who specialised in offering inbound/outbound international SIP trunks/numbering.
Colt
Similar to TalkTalk, Colt have international SIP trunk number options, that leverage their global network.
Twilio
Our most recent carrier option, and chosen for specific international SIP numbering options that Colt or TalkTalk don't have.