How to link mobile SIM telephone number to telephone intercom as CO line or outside call number.

Описание к видео How to link mobile SIM telephone number to telephone intercom as CO line or outside call number.

How to link a SIM card based telephone number to an intercom telephone system.
To serve as an outside or CO Line number through which calls can be made to outside locations out of the Telephone intercom system or for receiving calls into the telephone intercom system.

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