Because vendors' own fax guidance recommends a dedicated PSTN line for data devices and none of the reviewed ATA or VG documents addresses alarm or elevator lines, alarm dialers and elevator phones on FXS ports should be treated as unsupported until the device and monitoring vendors confirm compatibility.
inferred · Checked 2026-10-02
- Vendor
- not restricted
- Product
- not restricted
- Subsystem
- alarm and elevator lines
- Deployment
- multi-tenant, on-premises
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Status
- inferred
- Checked
- 2026-10-02
Sources
- Improve fax transmission with your ATA — Cisco (Webex Help Center) · tier 2 current vendor documentation · article body - dedicated PSTN line note
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting analog phones and FXS ports with no dial tone or failed calls: source note analog-fxs-troubleshooting-alarm-lines-inference. WarmTransfer. https://warmtransfer.net/knowledge/claims/analog-fxs-troubleshooting-alarm-lines-inference
BibTeX
@misc{warmtransfer-claim-analog-fxs-troubleshooting-alarm-lines-inference,
title = {Troubleshooting analog phones and FXS ports with no dial tone or failed calls: source note analog-fxs-troubleshooting-alarm-lines-inference},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/analog-fxs-troubleshooting-alarm-lines-inference},
note = {Source note analog-fxs-troubleshooting-alarm-lines-inference, checked 2026-10-02}
}