Northern UTA220/UTA220k PAD Reset Service Signals, Pad Clear Service Signals, Clr Inv, Clr Na

D-Channel X.25

PAD Reset Service Signals

A reset service signal is transmitted to the local DTE when resetting is initiated by the network or remote DTE. The reset cause code issued with the reset request packet from the network or local DTE indicates the reason. The reset cause code is interpreted by the PAD and the resultant cause code service signal extension is transmitted to the local DTE with the RESET service signal. The following is a list of the possible reset service signals that may be transmitted to the local DTE by the PAD.

	Table 12-3: PAD Reset Service Signals
Service	Reason
Signal
RESET DTE	Reset by remote DTE
RESET	Reset due to a local procedure error
ERR
RESET NC	Reset due to network congestion
RESET RPE	Reset due to a remote DTE procedure

Pad Clear Service Signals

	A clear service signal is transmitted to the local DTE when
	clearing is initiated by the network or remote DTE. The clear
	cause code issued with the clear request packet from the
	network or local DTE indicates the reason for the clearing. The
	clear cause code is interpreted by the PAD and the resultant
	cause code service signal extension is transmitted to the local
	DTE with the CLR service signal. Table 12-4 shows the clear
	service signals that may be transmitted to the local DTE by the
	PAD.
	Table 12-4: PAD Clear Service Signals
Service	Reason
Signal
CLR OCC	DTE is engaged in another call and cannot accept the incoming
	call
CLR NC	Network problem exists which prevents the network from
	handling the call
CLR INV	DTE requested an invalid facility
CLR NA	DTE to DTE connection not allowed. For example, if the closed
	user group was not the same the connection would not be allowed
CLR ERR	Clearing error caused by the local DTE detected by the PAD

UTA220/UTA220k 12-15