The TELCO-AD1 adaptor set is used to power up and transmit the audio signal from any ETS SM1 series microphone over unshieled 4 conductor cable runs or spare conductors available in telephone systems. Compatible with all ETS interface boxes and base stations.

Features:

• 4 position terminal blocks for main cable run.
• 3 position terminal blocks for microphone and interface connections.
• Converts SM1 series microphone signals to balanced audio at 10K Ohms impedance permitting the use of long distance unshielded cable runs.
• Double stick tape mounting.
• Dimensions: L2.1 x W.94 x H.82
• Weight: .02kg

Includes

• 2ea TELCO-AD1 board
• Installation instructions

Wiring requirements:

• Microphone and interface to TELCOAD1 boards, 2 conductor shielded #22, 100 feet max
• Main cable run 1000 feet max