XMission Voice
From XMission Wiki
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XMission Voice
XMission Voice is launching Beta soon! Stay tuned for details!
Access Codes (Star Codes)
XMission SIP Registrar Service
XMission provides a free SIP registrar service. This means you can place SIP to SIP calls free of charge. Your SIP Phone Number is your XMission email address.
Click this link for more information: SIP Registrar Service