Xerox WC5545F, Service Manual

Page: 912 / 2320

August 2007
2-720
WorkCentre 5687 Family
20H, 20J
Status Indicator RAPs
Figure 1 Line 1 and line 2 test pads
20J Fax Problems on Digital Networks RAP
Use this RAP to isolate the problem when using digital networks.
The Fax option was designed as an analogue Group 3 device. This will have the best perfor-
mance when connected to a dedicated analog phone PSTN (Public Switched Telephone Net-
work) line or POTS (Plain Old Telephone system).
• The Fax option will function on the following technologies:
– ADSL - Asymmetric Digital Subscriber Line
– DSL - Digital Subscriber Line
– VOIP - Voice Over Internet Protocol
– T1 Trunk / E1 Trunk (Europe).
NOTE: Due to the compression used on the technologies. The level of performance
will be lower than on a PSTN or POTS.
• The Fax option will not function on the following technologies:
– ISDN - Integrated services Digital Network
– FOIP - Fax Over Internet Protocol, (T.38 protocol).
Initial Actions
• Switch off the machine, then switch on the machine, GP 14.
• Check with the customer or IT person on what network the Fax service is being used and
what is the quality of service.
• Check that an analogue adapter or a connection for analogue terminals are available.
• Ask the customer to check with service provider that an analogue port for Fax service has
been provided and enabled.
Procedure
Perform the steps that follow:
• Go to 20A Fax Entry RAP.
• Request the latest SPAR release.
• Disable V34.
Enter dC131 NVM Read / Write and reset the value at the following locations:
– 20-287 T30MaxSpeedL1Tx = 11 (14400)
– 20-288 T30MaxSpeedL2Tx = 11 (14400)
– 20-289 T30MaxSpeedL1Rx = 11 (14400)
– 20-290 T30MaxSpeedL2Rx = 11 (14400)
• If problems are still not resolved after these actions, then escalate the problem using the
normal escalation process
Line 1 test pads 1, 2 and 3
Line 2 test pads 4, 5 and 6