Paradise P300 Buffer Autocentre, Enabled BER Action, Default Action, AIS Action, Backalarm

6.10.3 Change, User-Opt, Operation, ACTIONS Menu

Actions: 1:Buffer auto centre 2:BER 3:AIS 4:Back’ Alarm

Change, User-Opt, Operation, Actions Menu

BUFFER
AUTOCENTRE	This selects if the receive buffer is automatically centred when the Rx traffic
	returns to OK from the fail state. This takes advantage of any outage, and
	ensures the buffer is centred every time normal operation begins. This option can
	be disabled, as for minor outages the errors or sync losses caused by centering
	the buffer may be larger than those caused by the outage itself. Default:
	ENABLED
BER ACTION	This option controls how a high BER indication is handled. INTELSAT specify that
	when the BER exceeds 1 x 10-3the following actions are required: the Rx prompt
	alarm should be raised, AIS should be forced, and the backward alarm sent. This
	option can disable the forcing of AIS and the backward alarm to maintain the
	traffic as best as possible. Note the Rx Prompt alarm is still raised even if this
	option is set to NO ACTION to disable the AIS and Backward Alarm.
	Default: ACTION
AIS ACTION	This option is similar to BER action above, except it specifies how the modem is
	to handle the detection of AIS (the Alarm Indication Signal, all ones). INTELSAT
	specify the required actions as: the Prompt Traffic alarm should be raised, AIS
	should be regenerated (to prevent multiple noisy links building up enough errors
	to stop the all ones being detected), and the backward alarm should be sent. In
	continuous modes this option allows all three actions to be disabled. In
	Drop/Insert modes the Prompt Traffic alarm and the backward alarm are
	disabled, but AIS is still regenerated if it is detected. Default: ACTION
BACK'ALARM	This option is only displayed if the Insert mux is active and set for Channel
	Associated Signalling (CAS). It controls the forcing of the `abcd` signalling bits
	passed to the terrestrial port to certain values when an incoming backward alarm
	is received. Default: Normal. The options are
	Normal	A backward alarm is sent out of the insert mux to the terrestrial
		network (INTELSAT IESS 309).
	Sig AIS	The `abcd` signalling nibbles for the inserted timeslots are
		forced to all ones.
	b=1	The `b` bit of the `abcd` signalling nibbles for the inserted
		timeslots are forced to a one (Eutelsat EESS 501, SMS).
	ab=11	The `a` and `b` bits of the `abcd` signalling nibbles for the
		inserted timeslots are forced to a one.

P300H P300 Series Modem Installation and Operating Handbook Page 102