SIP Service

• Does T38Fax.com support inbound Caller ID?

• Does T38Fax.com support outbound Caller ID?

• Can I keep my current phone number?

• Can I send an anonymous Caller ID?

• ECM

• SIP

• T.38

• ATA

• T.30

• Testing Your Power-T.38 SIP Trunk

• Some Inbound Calls Not Ringing Through After Port-In

• Collecting Packet Captures

• Problems Making a Call (Outbound Calling)

• How do I contact Support?

• Is my Self-Care Password the same as my SIP Password?

• How many simultaneous fax calls can I send/receive?

• How do I dial out of your Service?

• What is ECM and why do I need it?

• Can I place voice calls using T38Fax?

• Are international calls supported?

See all 14 articles

• How do I sign up?

• Porting Fax Numbers to T38Fax

• T38Fax Quick Start Guide

• What are your recommended ATAs / analog adapters?

• Can I keep my current phone number?

• Recommended Fax Machine Settings

See all 17 articles