Alarm systems have been around for a long time. Many installations predate the deployment of residential DSL services. In fact, some of the alarm systems were built prior to the dramatic growth of the Internet and may not have been designed to anticipate the new ways that telephone lines are used to deliver high speed DSL connectivity to our customers. Both new and old security systems may have special wiring/filter requirements to properly operate with today's technology.

Home alarm systems use the telephone line the same way as the telephones by utilizing the portion of the telephone line carrying the voice conversation (the frequency spectrum between 0-4 kHz). On the other hand, DSL uses the capabilities of the telephone line that are not used by the regular telephone conversation (which is above 4 kHz) for the delivery of high speed data. The alarm systems have not been designed to perform under such conditions.

This is not due to equipment failure, but the improper wiring or filter installation of the DSL equipment in relation to the alarm panel.

Does this affect me?
Every customer having a home security system installed on the same line as the DSL service may potentially be affected.

If the home or business has two phone lines, the alarm system must be installed on the line that does not have DSL Service

If the Alarm must share the line with DSL, special wiring/Filters must be installed by a Certified Alarm Technician, Certified recommends all Customers with DSL contact one of the Sales Team members at (256) 383-1225 for more information on the type wiring/filters needed.