MXD Users Manual
April 5, 2012
Page 10 of 26
3.
Configuration 3. Alternative approach if neither of the above configurations works.
If the
MXD cannot communicate with the response center using Configurations 1 or 2, you may be able to
connect the MXD unit into a phone jack built into the DSL Modem, which should be located near
your computer. See Figure 8 below.
Figure 8. MXD Connection to DSL Modem
Setup for Voice over Internet Protocol (VoIP)
Caution
:
The MXD PERS system is designed to be used with either traditional or VoIP based
telephone service. Mytrex strongly recommends that a Plain Old Telephone Service (POTS)
line be used for any type of alarm system, due to the much higher reliability of POTS.
However, increasing numbers of residences now are serviced by VoIP. There are differences in
the quality of service provided by different VoIP providers. VoIP telephone circuits are not as
reliable as standard telephone systems for various reasons. For example, many Internet
providers refuse to provide any service level guarantee, and clearly indicate in their contracts
that service may be interrupted at any time. Also, VoIP circuits are dependent on AC electrical
service to the residence, unless the VoIP system is equipped with a backup power supply. If
your telephone service experiences service interruptions, you may not be able to use your MXD
to contact your monitoring center. For these reasons, your VoIP provider should be chosen
carefully. Please evaluate the risks of not having your phone service available as part of
making the decision whether or not to use VoIP telephone technology. Mytrex, Inc. will not
assume any responsibility for alarms that are not received by the response center due to failures
or interruptions in any telephone system used by the subscriber.
The MXD system is connected to a VoIP telephone circuit in the same manner as when a standard
telephone circuit is used, and usually no technical adjustments are required. However, sometimes VoIP
systems are installed in a home in a way that one or more wall jacks are not in service, and that situation
can cause confusion when first installing the MXD unit.
