When using the C-2000B in the “Analog Station” mode, dial tone is distributed to the four entry points and the C-2000B is always monitoring for a “CPC” (momentary break) from the phone line connected to terminals 6 and 7.
When pressing the call button on an E-30 AND the C-2000B detects a CPC break (from the Phone line), the C-2000B will provide 3 beeps to the E-30 followed by a CPC to the E-30 causing it to hang up. [The C-2000B is detecting a CPC from the phone line (or PBX extension) at the beginning of the call that is not intended to be a disconnect break (may just be a connection break)].
Newer C-2000B’s have an added programming option: “Enable/Disable analog station CPC detection” (the “#65” position). See page 18 of the product manual for further details.
In Programming mode: set “0#65” to disable analog station CPC detection.
This is only available on newer C-2000B’s with a part number (P/N) that ends with a “D” or “E” (this can be found on the serial number label).
Older C-2000B’s can be updated in the field to the latest software by ordering a part number “C2KC”. There is a charge of $30.00 for the software and it can be ordered through technical support or an authorized distributor.