GatesAir Intraplex VF-25, Installation And Operation Manual

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Appendix A – MAs for VF-25 Voice Module Intraplex VF-25 Voice Module
Version 7.1, November 2009
GatesAir, Inc. A-7
Intraplex Products
A.1.3.4 Signal Battery Polarity
To utilize the signal battery polarity option, remove the jumpers in applications where the external
signaling battery is positive (+) with respect to chassis ground. In cases of positive (+) signaling
battery applications, both jumpers must be removed.
A.1.3.5 Installation
To install the MA-306C module adapter, perform these steps:
1. At the rear of the chassis, insert the adapter into the same slot position in which the VF-25 module
has been installed.
2. Once it is seated securely, secure the unit with screws provided.
3. Plug the connector into the adapter.
A.1.4 MA-308C Four-Wire, RJ-45 Connector
The MA-308C module adapter combines
● Modular connectors
● Monitoring jacks
● Tandem application attenuators
The MA-308C module adapter is designed to use with 4-wire E&M Voice Frequency Modules in any
Intraplex Products multiplexer. It provides eight connectors for signal connection and monitoring, as
well as eight switches for control of additional signal attenuation. The switches are marked T=Transmit
and R=Receive, for each of the four channels (Figure A-5).