Northern UTA220/UTA220k Manuel D’Utilisation

12-14

The local DTE may receive service signals from the PAD in 
response to an issued PAD command or as the result of a packet 
or network action. Table 12-2 shows the service signals that 
may be transmitted to the local DTE by the PAD. 

*

PAD is in the PAD command state and the 
user can issue a PAD command

ENGAGED

Response to PAD STATus command

FREE

Response to PAD STATus command

PAR

Parameter: 
value or
Parameter: INV

Response to set PAD command if one of the 
parameters to be set is invalid or response to 
set and read command or read command

ERR

PAD command is in error

RESET

See PAD Reset 
Service Signals

Resetting by the network or remote DTE

CLR

See PAD Clear 
Service Signals

Clearing by the network or remote DTE

CLR

CONF

Confirmation of clearing either initiated by the 
CLR PAD command or by the packet

CLR

DER

Restart on the network link or response to 
packet virtual call request when the call 
cannot be established

COM

Call connected in response to a PAD Select 
command or the receipt of an incoming call 
(connection based upon acceptance of 
incoming call by the packet)

XXX

Line delete function performed for a printing 
terminal

\

Character delete function performed for a 
printing terminal

BS

SP

BS

Character delete function performed for a 
display terminal

CR

LF

Acknowledgment of a PAD command such 
as RESET or INT