ConnectMe Tunstall Vi+ Installation and Programming Manual
22
Selecting DTMF or STMF
Traditionally all home units have used Dual Tone Multi Frequency tones to
communicate with monitoring centres. As a result of network changes, these can on
occasion be corrupted so a new signalling method Sequential Tone Multi Frequency
(STMF) has been designed. All Tunstall Vi+ have already been configured to allow
the STMF method to be utilised. If a DTMF failure does occur then the home units
will automatically switch to STMF for subsequent alarm dial attempts and will then
continue to use STMF in preference to DTMF for all future alarm calls.
Using the following quick codes, Tunstall Vi+ home units can easily be set to use
DTMF or STMF or automatically choose.
NOTE
: Before using STMF, the PNC monitoring centre and back-up centre must be configured to
receive STMF protocol.
Prefix numbers
A function can be enabled/disabled to ensure a prefix number is inserted before all
dialled numbers from the home unit e.g. dialling 9 when using a PBX. This can be
achieved by pressing:
Prefix (max 8 digits)
Suffix numbers
To program a suffix please use PC Connect software.
Unit always uses DTMF
(should be used when
communicating to a monitoring centre
that cannot
support STMF).
Unit chooses DTMF or STMF
(default status).
Unit always uses STMF
(for use when operating
on GSM and/or NBN networks).
