Telephone exchange, 2 main lines, 6 extensions, 7 voice paths, fax dialing, DISA, RTC, CLI.
Telephone exchange, 3 main lines, 8 extensions, 7 voice paths, fax dialing, DISA, RTC, CLI.
Telephone exchange, 4 main lines, 12 extensions, 7 voice paths, fax dialing, DISA, RTC, CLI.
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