VoiceTrunking provides SIP Trunk service for Asterisk SIP, 3CX, Aastra, Allworx, AsteriskNow, Cisco, Cisco UC500, Cisco UC520, Cisco UC540, Cisco UC560, Elastix, Epygi, Fonality PBXtra, FreePBX, Grandstream, PBX in a Flash, SwitchVox, Talkswitch,..
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