Keep analog services running as POTS lines retire.

Move analog phones, fax machines and other validated devices onto an IP voice network through OpenVox FXS and SIP access with a controlled replacement plan.

OpenVox analog gateway supporting replacement of POTS lines

The analog dependency

Replace the line without disrupting the service.

A retiring POTS connection may still support a phone, fax machine or another analog device with a specific calling behavior.

The project must identify each dependency, determine whether the device can move through FXS access and validate the SIP service before the original line is removed.

VOICE

Analog telephone service

Retain a validated analog phone while the external network moves to SIP.

FAX

Analog fax requirement

Confirm fax behavior, codec, signaling and provider fit before migration.

SINGLE SITE

Replace one local line group

Map devices and numbers at a single office or service location.

MULTISITE

Coordinate several locations

Sequence line retirement and gateway deployment according to each site schedule.

Move from external deadline to accepted replacement.

Specific operator retirement dates must be confirmed from an authoritative source for the country and service involved.

  1. Confirm the line change

    Verify provider, location, service and retirement timeline.

  2. Inventory devices

    Record phone, fax, number, cabling and call behavior.

  3. Test the SIP path

    Validate registration, calls, fax and failure conditions.

  4. Retire the POTS line

    Remove the old service only after the replacement behavior is accepted.

Keep claims at the device and service level.

No alarm, access-control or regulated critical-device compatibility is claimed without specific evidence.

Analog phone and endpoint access

OpenVox FXS gateways connect analog phones and supported analog endpoints to SIP.

Proof chips
  • FXS

Fax included in UCP deployment guidance

OpenVox UCP documentation includes fax machines in analog endpoint scenarios.

Proof chips
  • FAX

Multiple service environments

OpenVox platforms and gateways support SIP interworking with documented IP voice systems.

Proof chips
  • SIP

Compatibility confirmed per device

Signaling, codec, call and fax behavior are validated before the old line is removed.

Proof chips
  • PROJECT FIT

Build a verified POTS replacement plan.

Share provider timelines, device types, numbers, cabling, fax requirements and the target SIP service. OpenVox can help map FXS capacity and validation steps.