Operation Manual

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6-14 FrameSaver NP 110 User’s Manual - Installation Guide 980-001-0240B
November
2000
DSX/Drop Tests
DSX/Drop testing features include DSX port status, loopbacks, and BERTs.
Diagnostic Test
Support
FrameSaver NP 110 responds to and can issue T1 loopback codes, set operator-initiat-
ed loopbacks, source BER Tests directed toward the T1 circuit or toward the DTE, and
source Frame Relay Test Packets toward the T1 circuit.
A block diagram of the test paths within the NP 110 is shown in Figure 6-8.
Fi
g
ure 6-8 Dia
g
nostic Test Paths
The arrows indicate the direction of the loopbacks and direction of the sourced test.
Loops and sources are as follows:
a. CSU loop in response to telco-initiated loop code, or operator command.
b. Payload loop in response to telco-initiated loop code, or operator command.
c. Line and Payload Loop codes directed toward the T1.
d. Payload Loop in response to V.54 code (DS0 specific).
e. Line loop directed toward the CPE(s).
f. Frame Relay Test Packets directed toward the T1 circuit by operator commands
issued through management session. Results are updated every five seconds and
displayed on the Device Status / Test screen.
g. BER Test directed toward the T1 circuit or DTE by operator commands issued
through management session. BER results are updated every five seconds and
displayed on the Device Status / Test screen.
h. Drop Port loop directed toward the Network or the CPE.
i. DSX Payload loop directed toward the CPE.
j. DSX Port loop directed toward the Network.
k. DSX Line loop directed toward the CPE.
All tests are initiated from the Device Status / Test screen.
The Device Status / Test screen is accessed from the System View screen, selecting
[DT] by typing “DT” followed by ENTER.
(a)
CSU
To T1
To CPE
(b)
(
g
)
(f)
(d)
Loop Codes (c)
(
g
)
Netw
Port
(e)
Frame
Mana
g
er
BERT
Drop
Port
(h)
To CPE
(
g
)
DSX
Port
(j)(i) (k)