Xerox WorkCentre Pro 423 Service Manual Download

Page: 228 / 619

WorkCentre Pro 423/428

2-196

CHAPTER 2 TROUBLESHOOTING

03/02

How to use the Diagnostic C/E Mode

Chain Function

Item

Content

Default

Description

Access

692**

G3M0 ECM CTC Number

0:000 to 7:111

Determines whether or not to send the CTC signal (including the fall back
data) after sending the identical frame the specific times. By increasing the
setup data, the signal will be send by the same modem speed on the line
where the failure occurred which is not practical.

693**

G3M0 ECM CTC Speed Down

0:Off 1: Speed down.

The data should not be changed as the transmission can be completed more
often by letting the fall back occur at the CTC signal.

694**

Sending CTC at 2400bps

0:Send 1:Do not send

In the G3 models, a modem with 2400bps or higher?? speed is not used.
Possibility of completing communication is higher by releasing the line once,
then transmitting signals using the newly supplied line, rather than sending
2400bps repeatedly using an inferior quality line. As a result, the data should
normally be not changed.

696**

Action after G3M0 ECM EOR detection

0: To be continued
1: Release line for EOR-EOP only

EOR signal can be detected when an extremely inferior line is supplied. In
such a case, possibility is higher to complete by releasing the line, then using
a newly supplied line rather than continuing communication using the existing
line. Accordingly, the data need not be changed.

791

Link modulo

0:Modulo 8
1:Modulo 128

In the communication using the ISDN line, this data specifies the modulo type
used for monitoring the number system of data link layer (for checking the
signal delivered, or received, etc.).

801

Network modulo

0:Modulo 8
1:Modulo 128

In the communication using the ISDN line, this data determines the applicable
area where the numbers can be added to the data packet, so that the network
layer cannot be overflowed

802

CSDN Protocol

0:X21PLP 1:T70null
2:IS8208modified

In the communication using the ISDN-CDDN line, this data determines the
protocol used for communicating to the line exchange network. Basically, the
data needs not be changed.

803

Packet size

7:128bytes 8:256bytes 9:512bytes
10:1024bytes 11:2048bytes
12:4097bytes

In the G4 communication, this data determines the maximum user data field
length of data packet for the network layer. When a small size is selected, the
data size transmitted per packet will be smaller and a longer transmission time
will result depending on the data volume.

810

TDT blocking size

7:128 8:256 9:512 10:1024 11:2049

In the G4 communication, this data determines the data blocking size at the
transport layer. The data must be set to “2048” to be accessible to the G4
facsimile communication network.

820

Session window

1 to 3

In the G4 communication, this data determines the number of consecutive
transmission of data package for the session layer. As the value is smaller,
the number of delivery checks for data packages will be greater and a longer
communication time will result.

821

Wireless communication monitor timer

0:Infinite 1: to 255sec (1sec=1step)

60=
60sec

In the G4 communication, this data sets up time to monitor non communication
status for the session layer protocol. The data need not be changed unless
otherwise instructed.

822

Exceptional process of sessions

0:Session 1:Document

In the G4 communication, when communication failure occurs, this data
determines which layer should be moved to the disabled status, the session
layer or document layer.

Xerox WorkCentre Pro 423, Service Manual

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