GAI-Tronics MRTI 2000 (No. PL1877A) Microprocessor Radio Telephone Interconnect Installation & Service Manual - Manual (Page 75)

PL1877A Microprocessor Radio Telephone Interconnect Operator Instructions
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Installation of the Multi-Digit Access Feature
It is recommended that programming software be used to install the multi-digit access feature. However,
these instructions are also provided for use with the terminal programming feature. Multi-digit access
prefix 1 is located in parameters 362–367; multi-digit access prefix 2 is located in parameters 368–373;
multi-digit access prefix 3 is located in parameters 374-379; multi-digit access prefix 4 is located in
parameters 380–385. Each multi-digit prefix can consist of DTMF digits from 0–D. Fill all unused
digits with FF (hexadecimal FF). If all digits are filled with FF, the corresponding multi-digit access
prefix is disabled.
1. Limiting patch access to users of multi-digit prefixes:
You can program the PL1877A to allow accessing the phone line ONLY if the mobile user has
entered a multi-digit access sequence. This feature can be used to prevent the PL1877A from
responding to the simple access commands (*, #*, **, and *n). Parameter 38 should be set to 1 if
you wish to limit phone line access to users of multi-digit access prefixes.
2. Programming the bypass characteristics of each prefix
Programming the bypass information for each individual multi-digit access prefix is a somewhat
complicated affair. To greatly simplify this task, it is recommended that you use the PL1877A’s
programming software. However, the instructions below are provided in case you wish to use the
terminal programming feature for programming this information.
Associated with each multi-digit access prefix are three parameters that define the bypass
characteristics for that prefix:
• The bypass characteristics for multi-digit access prefix #1 are set by parameters 515–517.
• The bypass characteristics for multi-digit access prefix #2 are set by parameters 518–520.
• The bypass characteristics for multi-digit access prefix #3 are set by parameters 521–523.
• The bypass characteristics for multi-digit access prefix #4 are set by parameters 524–526.
The first bypass parameter for each access prefix (that is, parameters 515, 518, 521, and 524) is
structured according to the following table:
First Bypass Parameter
Bit # Bypasses
Restriction #
7 1
6 2
5 3
4 4
3 5
2 6
1 Unused
0 Unused