4-4
Troubleshooting VU-ACD™/100 Maintenance Guide – Host/DOS
Table 4.1: Troubleshooting Checklist
Problem Resolution Reference
DMS Link
Link failure message appears on
Real-Time Display.
a. Check Link Log (Maintenance Menu) and System
Log (Administration Menu) for error messages.
b. Check that power is available to both PAD and
modem. View status indicators on PAD to see if
data is being transmitted.
c.
Check hardware connection from DigiBoard to
PAD.
d. If synchronous modems are used, verify modem
operation.
e. Verify PAD configuration (Maintenance Menu).
f. Request Switch Initialization (Maintenance Menu).
g. Contact DMS-100 switch technician and verify
MPC operation and protocol configuration.
h. Reprogram PAD.
a. Maint– Sec. 2.3.1, 2.3.3
b. Install– Sec. 2.9
c.
Install – Sec. 2.9
d. OEM Modem Manual
e. Maint– Sec. 2.6.1
f.
Maint – Sec. 2.8
g. NTI DMS-100
h. AppNote
MultiLink– one or more data links
fail.
a. Check Link Log (Maintenance Menu) and System
Log (Administration Menu) for error messages.
Determine which node which has failed.
b. Complete Steps b thru h listed above.
a. Maint– Sec. 2.3.3
Admin – Sec. 2.4
see b. thru h. listed above
5ESS Link
Link failure message appears on
Real-Time Display.
a. Check Link Log (Maintenance Menu) and System
Log (Administration Menu) for error messages.
b. Check that power is available to link modem. View
status indicators on modem to see if data is being
transmitted and received.
c.
Check hardware connection from DigiBoard to link
modem.
d. Verify modem operation at AIU.
e. Verify modem configuration.
f. Request Switch Initialization (Maintenance Menu).
g. Contact AIU technician and verify MIS link
operation to VU-ACD/100 host.
h. Check System Process Log to verify that the
attfed process is running. There should be one
attfed process running for every 5ESS node and
for each AIU port associated with the node.
i. Reprogram AIU.
a. Maint– Sec. 2.3.1, 2.3.3
b. Install– Sec. 2.12.10
c.
Install – Sec. 2.9
d. Install – Appendix G
e. Install – Appendix G
f.
Maint – Sec. 2.8
g. AIU Specifications
h. Maint– Sec. 2.9
j.
Contact the telco
MultiLink– one or more data links
fail.
a. Check Link Log (Maintenance Menu) and System
Log (Administration Menu) for error messages.
Determine which node which has failed.
b. Complete Steps b thru h listed above.
a. Maint– Sec. 2.3.1, 2.3.3
see b. thru h. listed above
External Display
Messages do not appear on the
External Displays.
a. Verify cabling and hardware connections (including
line drivers/modems) from DigiBoard to all External
Displays.
b. Check External Display port assignments (Device
Configuration Menu).
c.
Create messages and appropriately assign them to
Message Display Groups (External Display
Screen).
d. Set message display times to value other than “0”
seconds (External Display Screen).
e. Reset External Displays.
a. Install – Sec. 2.7
b. Admin – Sec. 2.5
c.
User – Sec. 8
d. User – Sec. 8
e. User – Sec. 8.4
