ParagonVoIP offer three forms of fax solutions:
ParagonVoIP supports faxing with a SIP ATA on a best efforts basis only!
Because fax machines rely on the analog representation of a digital signal (what you hear as a "fax tone") they are very sensitive to deviations in the fax data transmission. In practice this means that faxes are often interrupted by jitter and latency in the last mile (the portion of the call path between the switch and the end-user's fax machine). This level of unreliability causes most VoIP service providers to avoid deploying faxes using SIP ATAs.
Use of the Instant Fax ATA requires you to purchase a proprietary fax ATA from ParagonVoIP. To place an order, please contact your sales representatve or email firstname.lastname@example.org.
Comparison of Fax Methods
| ||SIP ATA||Instant Fax ATA||Instant Fax Portal|
|Hardware||Any SIP Compatible ATA may be used||Proprietary ATA must be purchased from ParagonVoIP||No ATA required|
|Cost to Customer|
|Supports Standard Fax Machine||Yes, connected to ATA by RJ11 cable||Yes, connected to ATA by RJ11 cable|
|Supports Fax Delivery Notifications||No||Yes, delivery notifications are sent by email||Yes, delivery notifications are sent by email and inserted to PBX Fax Inbox page.|
|Managed from DID portal and separate Fax portal.||Managed from DID Portal. Via ParagonVoIP support.||Managed from DID Portal. Via ParagonVoIP support.|
|Reliability||Low||Medium to High||Medium to High|