Mitel/ShoreTel Switches RJ-21X Port Pinout

Mitel Connect
Written By Alvaro Vasquez

An RJ-21 telephone cable, wired straight through, allows the Mitel/ShoreTel Voice Switches to connect the voice switch’s analog channels as shown in the table below. Please note that the Power Fail Transfer Unit provides an electrical connection between trunk channel 1 and the extension on channel 12.

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Alvaro Vasquez
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