Bsc Network And Bsca; Intermittent Problem Map 0835-1 - IBM 5110 Series Maintenance Analysis Procedures

C:
BSC Network and BSCA
Intermittent Problem MAP
PAGE 1 OF 5
001
Use this MAP as a guide to resolve BSC network
problems and BSCA intermittent problems.
- Have the customer maintain a record of the
symptoms and error codes. See the BSC M I M
for a description of the error codes.
- Have the customer maintain a record of the
error log and error history. See the BSC Users
Guide to print the error log and error history.
- Verify that the configuration record{s) is correct.
See the BSC Users Guide to display the
configuration record{s).
- Verify that the features, modems and strapping
options (echo clamp, clear to send delay,
transmit speed) are compatable with the remote
station{s).
- Run the 5110 System Test to verify that
another problem on the 5110 is not causing the
BSC problem.
Does the 5110 System Test run OK?
V N
002
Correct any problem indicated by the System
Test.
003
- Loop MOl 821 for 10 minutes by setting up a
path starting with step 005. The path stop
number depends upon which communication
facility card is installed. See the 5110 MIM for
details to set up a path.
Does MOl 821 loop without any errors?
V N
004
Correct any problems indicated by MOl 821.
©
Copyright IBM Corp. 1979
A
A
MAP 0835-1
005
- If the local station is on a nonswitched
telephone network and has the Switched
Network Backup (SNBU) feature on the
modem, switch to SNBU.
Is the local station operating on a switched
network or SNBU?
Y N
006
This section of the MAP is for a nonswitched
(leased) telephone network.
Is the local station using an external
modem?
Y N
007
- Use logic diagram 455 to check continuity
of the external cable.
Does the external cable test OK?
V N
008
Repair or replace the external cable.
009
(Entry Point F)
- Use MAP 0831 to check the transmit and
receive levels.
Are the transmit and receive levels
correct?
V N
010
Use MAP 0831 to fix the problem.
332
BCD
01JAN79
EC 836600 PEC 835541
MAP 0835-1