GAI-Tronics MRTI 2000 (No. PL1877A) Microprocessor Radio Telephone Interconnect Installation & Service Manual - Manual (Page 95)

PL1877A Microprocessor Radio Telephone Interconnect Parameter Modification
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Dialing Characteristics
Parameter Function
31 DTMF land-line signaling selected = 0
Pulse land-line signaling selected =1
Default = 0
121
Mobile audio cut-through delay: Valid range = 0–9.
This number is x in the following equation: cut through delay = 1 second + x (1 second).
Default = 5
Mobile audio cut-through delay is the allowed DTMF interdigit time for a telephone
number dialed by the mobile. The audio path from the mobile to phone line is disabled
for the duration of this timer. Thus, mobile DTMF is kept from being routed to the
phone line while the PL1877A regenerates the DTMF or converts the mobile DTMF into
pulse dialing. This timer is refreshed each time a new DTMF digit is received from the
mobile.
DTMF Dialing
36 Disable mobile DTMF regeneration = 0
Enable mobile DTMF regeneration = 1
Default = 1
37 Disable mobile DTMF regeneration after call established = 0
Enable mobile DTMF regeneration after call established = 1
Default = 1
When the mobile user dials a telephone number, he is supposed to terminate his dialing
with a *. This parameter determines how subsequent mobile DTMF digits are treated. If
this parameter is enabled, the PL1877A regenerates DTMF digits subsequent to the *.
Otherwise, the mobile DTMF is routed transparently to the phone line.
129 This parameter determines the “on” time for regenerated digits (the interdigit time is
fixed at 100 ms). Valid range = 0–8, for a DTMF “on” time range for 50–450 ms.
Default = 1
Pulse Dialing
Due to the wide variations in telephone line performance experienced in rural and urban
environments, it may be necessary or desirable to vary the dial pulse rates from the
nominal 9 pulses per second (pps). Long telephone lines to the central office sometimes
require lower pulse rates for reliable operation while short telephone lines may allow
higher pulse rates. It is recommended that several pulse rates be tried initially to
determine the highest reliable rate. Then reduce that rate somewhat to ensure
continuously reliable performance.
130 Rotary dial pulse rate. Valid range = 0–9
0 = 9 pps 6 = 12 pps
1 = 6 pps 7 = 13 pps
2 = 7 pps 8 = 14 pps
3 = 8 pps 9 = 20 pps
4 = 10 pps Default = 0
5 = 11 pps