GAI-Tronics MRTI 2000 (No. PL1877A) Microprocessor Radio Telephone Interconnect Installation & Service Manual - Manual (Page 73)

PL1877A Microprocessor Radio Telephone Interconnect Operator Instructions
67 12/10
Multi-Digit Access/Release
Multi-Digit Access
The multi-digit access feature provides a method of allowing certain privileged mobile users to bypass
restrictions that have been programmed into the PL1877A.
For example, if parameter 47 is set to 0, mobile users are not allowed to dial telephone numbers whose
first digit is 1. Thus, every time a mobile accesses the PL1877A and attempts to dial a number beginning
with 1, the PL1877A disconnects.
However, it may be desirable to allow certain mobiles to dial telephone numbers beginning with 1 even
though most mobiles in the system are not allowed this privilege. To accomplish this, you must use the
multi-digit access feature.
A multi-digit access code is a DTMF code of 1–6 digits that is used as a prefix to the DTMF access
commands (*, #*, *n [the autodial command, where n is the desired autodial location] and ** [the redial
command]). The PL1877A supports four unique multi-digit access codes, each of which may be from 1–
6 digits in length. Each multi-digit access code can be programmed to bypass a specified set of
restrictions (such as dialing a telephone number beginning with 1, as cited in the example above).
N OTE : Consider the multi-digit access sequence XYZ* where XYZ is the 3-digit multi-digit access
prefix to the * access command. The PL1877A recognizes XYZ as a multi-digit access prefix only if the
time between individual digits (represented by the “-” in X-Y-Z-*) is no greater than 1 second. Also, the
duration of each digit must be no greater 3.5 seconds.
Bypassing Restrictions via Multi-digit Access
Refer to the Bypassing Restriction Table on page 68 for the list of the restrictions that can be bypassed
via a multi-digit access prefix. The parameter that enables each restriction is also listed.