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.
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