Operation Manual

5 Diagnostics
980-001-0240B FrameSaver NP 110 User’s Manual - Installation Guide 5-33
November 2000
Fault Isolation
Figure 5-21 shows a typical application with potential fault locations marked
( a ) through ( i ). Table 5-4 describes the corresponding indications, reporting mech-
anisms including the traps for each fault, and suggested test options.
.
Figure 5-21 Fault Locations
Frame
Switch
DCS
CSU/FSU
Router
Modem
D4
(a)
(b)
(d)
(f)
(
g
)
(e)
(h)
(i)
FrameSaver
NP 110
Serial
Console
(c)
Table 5-4 Fault Conditions
Fault Loc Indication(s) Fault Sensing Trap Transport Test Options
Router Failure (a) No LMI from Router.
DTR low at Router.
FSU senses lack of LMI, no
DTR, or no power at serial
interface.
FSU sends inband
Trap.
PING Router
Dial into router console port.
Router - FSU Cable
disconnected or router
powered down
(b) No LMI from Router.
DTR low at Router.
FSU senses lack of LMI and
no DTR, and no power at
serial interface.
FSU sends inband
Trap.
PING Router
Dial into router console port.
CSU (c) No LMI at Frame
Switch and FrameSaver
NP 110.
FSU self-check. FSU sends Trap via
modem.
Call in to Modem.
Frame Switch CSU/Payload
loop tests.
Local Power (d) No LMI at Frame
Switch.
CSU senses AC Power loss. FSU sends inband
Trap.
Dial in and check for answer.
T1 Local Loop or DCS
failure
(e) No LMI at Frame
Switch.
No LMI at FrameSaver
NP 110.
CSU senses carrier loss or
loss of FDL (in non SF
mode).
FSU sends Traps via
modem.
Call in to Modem to view T1
status.
Frame Switch CSU/DSU
loop tests.
Frame Switch T1
Access Loop
(f) No LMI at Frame
Switch.
No LMI at FrameSaver
NP 110.
FSU senses no response to
LMI enquiries.
FSU sends Trap via
modem.
Check T1 status at Frame
Switch.
FSU to Frame Switch BERT.
Frame Switch (g) No LMI response to
CSU.
FSU senses no LMI response. FSU sends Trap via
modem.
Loopback at Frame Switch
toward itself.
High Error Rate (h) Trap from Frame
Switch, FrameSaver NP
110, or Router.
FSU monitors Frame Relay
frames.
CSU monitors T1 frames.
FSU sends inband
Trap.
BER from FSU, to loop at
Frame Switch.
View 24 hour statistics.
Modem or
Dial Line
(i) Fails periodic Dial Tone
Test.
Modem can’t detect/break
dial tone.
FSU sends inband
Trap.
Routine Modem and Dial
Line.