Motorola MTR2000 T5544 Instruction / Field Service Manual page 82

Installation
Function on GPI_14
via Optocoupler (E/M sub). (See
Note 2)
Fast External PTT*
via Transistor
via Optocoupler (E/M sub)
Fast External PTT
via Transistor
Function on GPO_14
AC Fail
SPI Latch for GPO_14 (software defined)
Notes
CAUTION
24
Table 1. Configuring Input GPI_14 Function
Input Type
Table 2. Configuring Output GPO_14 Function
via Relay Closure
via Relay Closure
The shaded areas indicate default manufacturing settings.
Note 1: This is an active low; that is, no current to the Opto Input.
Note 2: This configuration, with P6 out (PTT when current to the Opto Input)
represents the E Signal of 4 wire E&M Trunk Type I Phone Signalling.
The opposite direction of the E&M is covered in Note 3.
In this configuration the second remaining unused input type must
be jumpered to the SPI Buffer. The Buffer Input should never be
!
left floating; otherwise the IRQ Generator will not function prop-
erly (i.e., use either P2-1&2 or P9-7&8).
System
Connector
Input Pins
A29 Opto + 3 - 4, 1 - 2
A26 Opto –
B26
A29 Opto + 3 - 4, 1 - 2
A26 Opto –
B26
System Connector (J5)
Output Type
Auxiliary I/O Board Jumpers
P2 P9
(See Note 1)
9 - 10, 7 - 8
9 - 10, 7 - 8
Output Pins
B29, A30
B29, A30
P6
In
In
Out
Out
Auxiliary
I/O Board
Jumper P5
2 - 4
1 - 2
68P81096E37-N
06/28/05