User Manual

AS4000 Operations and Maintenance
Section
605-0000-431
3
. Issue 1.6. Date3/2/99
Page 14 of 22 © Copyright Airspan Communications Corporation 1999
2.1.10. Loss of communications with the Sitespan
Message: ‘(Type)Shelf(N):Shelf Controller:Lost Comms With EM’
Source: V.24 connection to the Sitespan PC
Fault Condition: The SC cannot forward its messages (urgent or non-urgent) to the
Sitespan and has to use its internal buffer. Customer service is not
effected unless the cause of the fault is failure of both DC inputs to
the CT rack.
Likely Cause: a. the V.24 cable connected to the Sitespan Server / Site Controller
PC has been disturbed.
b. Failure of both DC inputs to the CT rack.
Consequential Effect: a. SC buffer may over-fill and urgent messages will be lost if buffer
starts to wrap-around.
Repair Actions:
a) Check V.24 cable connections from Modem Shelf (PL5) to
Sitespan Server / Site Controller PC
Refer to detailed level procedure DLP-003 in Section 4
b) Failure of both DC inputs to the CT rack. Go to DLP-012 in
Section 4