Alarm Panel Recommendations for VoIP Lines
Alarm panels can be tricky on VoIP because they were designed for traditional copper landlines. This article explains how to make alarm panels work as reliably as possible on EMAK Telecom service, and what to consider when picking or upgrading a panel.
Important warning: Because EMAK Telecom service runs over your internet connection, we cannot guarantee that an alarm panel connected to a VoIP line will always communicate reliably. If your internet goes offline, alarm communication with your monitoring centre is impossible. Verify all of your local and municipal regulations regarding alarm, security, fire, and other monitoring services on VoIP. Share this page with your alarm installer, and contact EMAK Telecom support if you have any questions.
Quick Recommendations
The most important guidelines for an alarm installer working with an EMAK Telecom VoIP line:
- Always set the alarm panel to use the Contact-ID (CID) report format.
- Make sure the phone line polarity is correct. If you see communication errors, reverse the TIP and RING wires.
- Install an Ethernet module so the panel can communicate to the monitoring centre over the internet rather than over the phone line.
- If reliability is critical for your installation, do not rely on the VoIP line — keep a traditional Bell or Telus landline, or install a cellular module. Either option carries an additional monthly cost.
- Older panels (more than 10 years old) often struggle with VoIP. Consider upgrading the panel.
Alarm Communication Protocols
There are three major alarm reporting formats. Their compatibility with VoIP varies significantly:
Contact-ID (CID) — Recommended
Contact-ID is our recommended protocol. Almost every panel manufactured in the last 10 years supports it. Instead of placing a data call, CID transmits information using DTMF tones — the same tones you hear when pressing keys on a phone — which travel cleanly over VoIP. For a deeper explanation of the protocol, see li0r.wordpress.com/contact-id-protocol.
SIA
SIA was originally created by Ademco and is the default protocol on many panels out of the box. It works well over traditional landlines and every monitoring centre can receive reports in this format. SIA calls sound like fax calls — screeching and popping sounds while the call is active — because they are actually data calls. They have a very poor success rate over VoIP and should be avoided whenever possible.
4/2 and 3/2
4/2 and 3/2 are older protocols, similar to Contact-ID but using pulse tones instead of DTMF (like rotary phones). Most centrals can still receive these signals, but support over VoIP is poor and even on traditional landlines they are being phased out — they are slower and less reliable than both SIA and CID.
Alarm Panel Manufacturers
In the Canadian market there are three major panel manufacturers: Tyco DSC, Honeywell, and Paradox. Upgrade costs and monthly cellular service costs vary widely between them.
Tyco DSC
Tyco DSC is by far the most commonly installed panel. Almost all DSC panels support Contact-ID. The newer HS3032 and HS3128 panels include Ethernet on the board, so you do not need an expensive add-on module — these are a good choice when you plan to communicate over Ethernet. For older panels, you can buy Ethernet or cellular upgrade modules in the $150–$350 range, depending on the model and supplier.
DSC cellular modules are locked to the Rogers network. The monthly cellular service cost typically falls in the $7–$20/month range, depending on the markups taken along the chain:
Rogers > Connect24 > Monitoring Centre > Dealer > End-User
Honeywell
Honeywell modules are also popular, but tend to be the most expensive — both for the upgrade modules themselves and for the recurring fees. Most modern Honeywell panels support Contact-ID. Retrofit Ethernet or cellular modules cost between $250 and $400, depending on the model and supplier.
Honeywell cellular modules are locked to the Bell network. Expect to pay roughly $30/month on top of your monitoring fees. Honeywell takes a large cut along the chain:
Bell > Honeywell > Monitoring Centre > Dealer > End-User
Paradox
Paradox is a smaller manufacturer based in Quebec that is becoming more popular. Virtually every monitoring centre in Quebec supports Paradox panels today, but verify with your dealer before installing one. Paradox is often dramatically less expensive than DSC or Honeywell — expect about $75 for an IP750 Ethernet module and roughly $150 for a cellular module.
Unlike the other manufacturers, Paradox does not lock cellular modules to any specific carrier, so any SIM card will work. Low-cost data SIM cards for alarm panel use are widely available — contact EMAK Telecom sales if you would like to purchase an alarm SIM.
Alarm Panel on VoIP FAQ
Why doesn’t my alarm panel work reliably on VoIP?
Most alarm panels were built for traditional copper landlines. Protocols like SIA send modulated data tones that VoIP audio compression can corrupt, causing failed reports. Switching to Contact-ID (which uses simple DTMF tones) usually fixes the issue. If your panel does not support CID, the panel itself is the limiting factor and an upgrade is in order.
Can I rely on a VoIP line for fire or life-safety monitoring?
No — your local code may also forbid it. VoIP service requires both your internet connection and your power. If either fails, alarm communication fails too. Use a traditional Bell or Telus landline or a cellular communicator for fire and life-safety monitoring, and confirm with your installer and local authority.
Does EMAK sell SIM cards for alarm panels?
Yes. We can supply data SIM cards suitable for Paradox cellular modules at competitive monthly rates. Contact EMAK Telecom sales for details.
What should I tell my alarm installer?
Send them a link to this page. The most important points: set the panel to Contact-ID, install an Ethernet module for reliable IP-based reporting, and consider a cellular module as a backup path if downtime is unacceptable.