XCVR Port / Type
Connects to This Device/
Port
Description
trunked circuit-based site, mixed
mode, or digital only.
Reference frequency input,
BNC*
Service monitor Connection port to service moni-
tor for frequency calibration.
* See GTR 8000 Base Radio Time and Frequency Inputs
on page 157.
NOTICE: For information about conventional functions and topologies the
base radio supports,
see the Conventional Operations manual. The base radio can be IP managed while using the 2-
or 4-wire/V.24 interface for channel traffic.
3.4.8.1
System Connector Ports (Conventional)
The system connector, a 50-pin Mini SCSI connector, is used for the WildCard inputs, outputs, and the
analog audio paths not routed to their own connector.
Table 39: 50–Pin System Connector Pin-Outs (Conventional)
Pin No. Signal Type Function Note
1 Aux In 2 Input Main Standby - External
handshaking
Pull To Ground To Activate
2 Aux In 4 Input
Main Standby- Status of oth-
er side
Pull To Ground To Activate
3* Aux In 6 Input In-Cabinet Repeat Pull To Ground To Activate
4 Aux In 8 Input Main Standby - Connectivity
other Station
Pull To Ground To Activate
5 Aux In 9 – Input Phone Patch - PL Strip Opto-Isolated In - Current flow to
Activate
6 Aux In 10 – Input Phone Patch - Monitor Opto-Isolated In - Current flow to
Activate
7 Aux In 11 – Input Opto-Isolated In - Current flow to
Activate
8 Aux In 12 – Input Opto-Isolated In - Current flow to
Activate
9 Aux In 13 Input For future use Pull To Ground To Activate
10 Aux Out 12 Output Low Impedance to Ground When
Active
11 Aux Out 2 Output Phone Patch - Rx Carrier Low Impedance to Ground When
Active
12 Aux Out 4 Output Main Standby - Station Sta-
tus
Low Impedance to Ground When
Active
13 Aux Out 6 Output Low Impedance to Ground When
Active
MN003286A01-E
Chapter 3: GTR 8000 Base Radio Installation
112
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