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What are the different Layer 1 states of the ISDN port?
Article Id #: 14
ISDN LAYER 1 STATES

ISDN-PORT NETWORK MODE (NT1):

State G1 = NT1 DEACTIVATED
State G2 = NT1 PENDING ACTIVATION
State G3 = NT1 ACTIVATED AND WORKING
State G4 = DEACTIVATION REQUEST RECEIVED

ISDN-PORT USER MODE (TE)

State F1 = TE INACTIVE, NO POWERFEEDING
State F2 = TE POWER FEED, WAITING FOR INFO 0
State F3 = TE DEACTIVATED
State F4 = TE IS WAITING FOR SIGNAL
State F5 = SIGNAL RECEIVED, SYNCRONIZATION
State F6 = SYNCHRONIZED, READY FOR RECEIVING
State F7 = ACTIVATED, WORKING
State F8 = LOSS OF FRAME ALIGNMENT

NOTE:
THE ACTIVATION PROCEDURE CAN BE INITIATED BY THE TE OR THE NT.
THE DEACTIVATION CAN ONLY BE INITIATED BY THE NT.
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