Xerox WorkCentre Pro 423 Service Manual page 72

WorkCentre Pro 423/428
Names & Description of G4 Signals Recorded
Signal
SABM
Transfer to Non-Syncro. & Balance Mode(Mod8)
SABME
Transfer to Non-Syncro. & Balance Mode Extension(Mod128)
DISC
Disconnection command
UA
Unalloted numbers system confirm response
DM
Disconnection mode response
FRMR
Frame reject response
I
Information command
RR
Receive ready command/Response
RNR
Receive not ready command /Response
REJ
Reject command/Response
XID
Exchange ID command/Response
N2TOUT
Max. # of send attempts N2 Over
T3TOUT
T3 Timer timeout
Dev Dead
Device is dead. (No response from device)
Overrun
Number of overrun errors
Nonoctet
Number of Nonoctet line up frame receive
Abort Sq
Number of Abort sequence receive
CRC Err
Number of CRC errors
Long Frm
Longer-than-spec frame
Discard
Frame to be discarded
Underrun
Number of underrun
CR
Call request
CN
Connect
CA
Call acceptance
CC
Connection complete
CQ
Connection recover request
CI
Cancellation (Disconnection) instruction
CF
Recovery confirm
SQ
Restart request
SI
Restart instruction
SF
Restart confirm
DT
Data
RR
Receive ready
RNR
Receive not ready
RQ
Reset request
RI
Reset instruction
RF
Reset confirm
IT
Interrupt
IF
Interrupt confirm
DIG
Diagnostic
Description
2-40
03/02
GQ
Registration request
GF
Registration confirm
Unknown
Undefined
COMWTOUT
T20TOUT
Restart time out
T21TOUT
CR (Call request) timeout
T22TOUT
RQ (Reset request) timeout
T23TOUT
CQ (Recover request) timeout
T25TOUT
Lin Dead
Line is dead. (No response from lower layers)
DTErdy
DTE ready
DCErdy
DCE ready
DCEnot
DCE not ready
OffHook
CR (Call request)
Bell
Bell indicating arrival
DialST
Dial start
Dial
Dial No. send
ID/CPS
ID/Call Progress Signal receive
DATArdy
Data ready
OnHook
Disconnection request/Response
DiscCon
Disconnection confirm
DiscInd
Disconnection instruction
TCR
Transport connection request
TCA
Transport connection acceptance
TCC
Transport connection cut
TBR
Transport block reject
TDT
Transport data
Unknown
Undefined
T02TOUT
Awaiting TCR receive
T11TOUT
Awaiting TCA for TCR
Net Dead
Network is dead (No response from lower layers)
CSS
Session start command
RSSP
Session start permitted response
RSSN
Session start not permitted response
CSE
Session end command
RSEP
Session end permitted response
CSA
Session abort command
RSAP
Session abort permitted response
CSCC
Session change control command
RSCCP
Session change control positive response
RSUI
Session user information response
ANYSS
Undefined session
CHAPTER 2 TROUBLESHOOTING
2.3 Level 2 Troubleshooting