GAI-Tronics MRTI 2000 (No. PL1877A) Microprocessor Radio Telephone Interconnect Installation & Service Manual - Manual (Page 68)

PC Programming PL1877A Microprocessor Radio Telephone Interconnect
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Multi-Digit Release
This feature requires entry of a DTMF suffix after the # (or ##) standard release command. If the
PL1877A does not receive this suffix, it will not respond to the release command. This is used when it is
desirable to allow the mobile user to dial a DTMF # without causing phone line disconnection. There are
5 available release codes - one general multi-digit code and four specific multi-digit codes.
Linking Multi-Digit Release to Multi-Digit Access
When it is desired to have all mobile users employ the same release code, the general multi-digit release
code is sufficient. However, for added security it may be desirable to prevent the PL1877A from
disconnecting unless it receives a multi-digit release code from the same mobile user who originally
entered the multi-digit access code.
For example, suppose the multi-digit access prefix #2 is 786 and the general multi-digit release suffix is
999. When a mobile enters 786*, the PL1877A accesses the phone line. To disconnect, the mobile user
would enter #999. However, since 999 is the general multi-digit release code that is known to all users of
the system, any other mobile user could disconnect the call in progress.
In addition to the general release suffix, the PL1877A provides four other release suffixes, each of which
corresponds to one of the multi-digit access prefixes.
The PL1877A can be programmed to require the corresponding multi-digit release code when the mobile
user has accessed the phone line using a multi-digit access code.
For example, suppose the multi-digit access code #1 is 786 and the corresponding release suffix is 546.
When the mobile uses accessed the PL1877A by entering 786*, the sequence #546 would be required to
disconnect.
N OTE : If the associated multi-digit release code is not enabled, the PL1877A requires the general multi-
digit release code. If the general multi-digit release code is not enabled, the PL1877A will simply
disconnect is response to the # or ## disconnect command.