Northern Modular Telephone - Manual (Page 21)

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Special features
Electronic Lock Network Wide (not available on the MSL-100)
To lock a telephone (B) from another telephone (A):
1. Lift the handset and dial the Electronic Lock Activate FFC defined for Node 1.
2. Dial the station password defined for telephone B.
3. Dial the digits normally dialed for telephone A to ring B.
If the FFC tone option is configured, you hear a confirmation tone. Telephone B is locked.
Note: If B was already locked, this procedure is ignored.
To unlock telephone (B) from telephone (A):
1. Lift the handset and dial the Electronic Lock Deactivate (ELKD) FFC defined for node 1.
2. Dial the SCPW defined for telephone B and the digits that telephone A would normally dial to ring
telephone B (e.g., 42 + 9999 +6-343-3000).
If the FFCT option is configured as YES in LD 57 for Node 1, confirmation tone is given to telephone
A to confirm that the unlock operation has been successful. Telephone B becomes unlocked if it was
previously in a locked state.
Note: If telephone B was already unlocked, the above operation is ignored and Station B remains
unlocked; however, a confirmation tone is provided to verify that the telephone is unlocked.
If the unlock operation was unsuccessful, overflow tone is given.
Electronic Lock on Private Lines
Feature operation of Electronic Lock for Private Lines is the same as for the basic Electronic Lock
feature.