IBM 3745 Problem Determination Manual page 273

Problems on One Line Only (LlC1 to LIC4)
NCP Commands and Modem Statuses
Table 9-1. Call Request commands and Line Communication Status Summary
c
Local 3745
Modem status answers
(NCP commands) (LCS and ELCS codes generation)
Call Requests X'OO'
CRN Call request with number
CRI Call request with number plus identification
X'9E' Correct completion
X'9C'
Disconnected
X'02' Command rejected
X'ES' INV Invalid call request
X'EA' OLC Delayed call
with the parameter of time duration
X'FC' CFI Call failure indication
An ELCS code is added to X'FC'
X'01' Engaged tone
X'03' Local DCE busy
c
X'04' Ring tone
X'05' Abort call
X'06' Answer tone not detected
X'07' Forbidden call
X'FF' Unknown cause
On receipt of call collision, the 3745 rejects the 'call
X'EC' INC Incoming call (Call collision)
request' command and sends a 'clear request'
command to the interface. The DTE will wait one X'SO' Time out
minute before retrying a call request.
On receipt of time out, the 3745 rejects the 'call
.
c;
request' command and sends a 'clear request'
command to the interface.
The duration the DTE will wait before retrying a call
request depends:
.
On the value assigned to the REDIAL keyword in
the PATH statement of the VTAM* switched
major node definition.
.
On the value assigned to the REDIAL keyword in
the LINE statement of the NCP generation.
Monitor incoming call X'OE' X'9E'
Correct completion
.
X'SO' Time out
X'02' Command rejected
Clear request X'OF' X'9C' Disconnected
X'SO' Time out
X'02' Command· rejected
o
9-22
IBM 3745 Communication Controller: Problem Determination Guide