OpenTAP

OpenTAP: TAP-to-SMS messaging for alarm and monitoring systems

OpenTAP runs a gateway service that translates TAP (Telecator Alphanumerica Protocol) messages into SMS text messages delivered to a mobile phone. The company presents itself as the UK's number one provider of TAP to SMS for alarm systems and other monitoring systems, a claim that reflects its own positioning rather than an independent ranking.

The service is built on TAP, which the company describes as a protocol that relies on trusted equipment, a standard phone line and a dial-up modem. Because of that combination, OpenTAP argues that TAP is the most reliable route for sending full-text messages to a mobile phone, and that messages can still arrive through the gateway even when an internet connection is completely down, which it contrasts with email or SNPP.

How the service is billed

According to the site, using the gateway carries no subscription charge and no line rental. The only cost is the call to the dial-up access numbers. The published rate is £0.35 per minute plus the network provider's connection charge.

Access numbers and device configuration

The gateway is used by adding an access number to the alarm panel and saving it. The site lists 09018600011, 09117329997 and 07640177177 as the numbers to add. It also states that the access numbers 07045607101 and 07011106620 are no longer supported, and asks users to update their alarm system or other TAP-compatible devices with the new numbers. For users unsure how to make the change, the company suggests calling a local alarm installation engineer for help adding the access numbers.

Approvals and intended users

OpenTAP states that its service is approved by Texecom, Honeywell and Pyronix. The gateway is aimed at network administrators and other IT professionals who need a dependable way to receive alerts from network management and monitoring systems. The site names WhatsUp Gold, SolarWinds, QuickPage, WIN911, Sensaphone Remote Monitoring Solutions and Nagios as examples of systems that can send alerts through the service.

Company details

OpenTAP is registered as Company No. 12175970. The site also carries a news item titled "The great copper switch off 2025".