ADTRAN ESU 120e user manual Rop Port Interface

A ppendix C. System Messages

D rop Port Interface

The following messages indicate a condition on the Base Drop (PBX) in- terface:

Loss of Frame	Drop Port unable to frame align with incoming
	FAS/NFAS framing pattern. Remote Alarm
	(Bit 3 TS0 NFAS word) is transmitted on the
	drop port interface.
Loss of TS16 MF	Drop Port unable to sync on TS16 multiframe
	signal. Valid only when CAS/TS16 framing
	enabled. Remote multiframe Alarm is
	transmitted out the drop port interface. AIS is
	transmitted out the drop port in TS16 only.
Loss of CRC-4	Drop Port unable to sync on CRC-4 multiframe
	signal. Valid only when CRC-4 framing is
	enabled. Remote Alarm is transmitted out the
	drop port interface. AIS is transmitted out the
	drop port.
Loss of Signal	No signal detected at the drop port interface.
Remote Alarm	Remote alarm signal (Bit 3 of NFAS word)
	being received at drop port interface.
Remote MF Alarm	Remote multiframe alarm signal (Bit 6 of TS16
	for three consecutive multiframes) being
	received at drop port interface.
AIS Received	Unframed ones being received at the Drop Port
	interface.
Frame Slip	Indicates clock being received at drop port is
	different frequency than network clock.
Excessive BER	Excessive Bit Error ratio. A bit error ratio of
	greater than 1X10-3is being recieved at the
	Drop Port interface.

1200420L1-1 ESU 120e User Manual C-3