E-6 MTR3000 Third Party Controllers: Phone Patch
E.2.5.3 Continuous Tone-Controlled Squelch Systems (CTCSS) Out
The MTR3000 Base Station/Repeater’s transmitter will yield 60% RSD with 80mV rms into the Tx
Data port. The “CTCSS” signal delivered by the community repeater panel is at a high enough drive
level to leave the community repeater panel’s “Encode gain high/low” switch in the factory default
position (back panel Switch 3).
E.2.5.4 Tx Audio Pre-Emphasis
Set the “Encode flat/ De-emphasized” switch to the Up position on the community repeater panel.
E.2.5.5 Carrier Operated Relay (COR)
For use with the MTR3000 Base Station/Repeater, configure the specified back panel switches on
the community repeater panel as follows:
• Switch 6 “COR source internal/external” (set to the Down position)
• Switch 7 “COR polarity positive/negative” (set to the Up position)
• Switch 8 “COR pull-up on/off” (set to the Up position)
E.3 Phone Patch
E.3.1 Description
The MTR3000 Base Station/Repeater is capable of multi-mode telephone interconnect through the
Zetron Model 30 Phone Patch. The Zetron Model 30 Phone Patch interconnects to the MTR3000
Base Station/Repeater and allow users to initiate and receive land line telephone calls via the
subscriber radios. When properly configured, subscribers can initiate and answer telephone calls.Via
selective signaling, calls from land line users can be directed to any subscriber or to a specific user.
Additionally, access control is also afforded by the Zetron Model 30 Phone Patch.
Refer to the Zetron Phone Patch Manual (supplied with the phone patch) for specifications,
operation, installation, alignment, programming, and repair information.
Figure E-6 Zetron Model 30 Phone Patch
E.3.2 Compatibility
Zetron Model 30 Phone Patch is compatible for all versions of MTR3000 Software and Hardware.
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