Verilink PRISM 4001 (34-00244) Product Manual - Manual (Page 29)

Terminal Operation 4-9 PRISM 4001
LONG: Same as NORMAL with longer delays. These
delays are broken down in Table 4-C.
DTR A LARM
Selecting ENABLE allows the 4001 to go into alarm on loss of
DTR. When set to DISABLE, the unit does not go into alarm.
V.54 L OOP
Selecting ENABLE allows the 4001 to respond to inband-
V.54 loop commands. If DISABLE is selected, the 4001
ignores these commands.
LL D ETECT
Allows the user to select whether the CSU/DSU responds to
the local loop lead on the DTE connector of the 4001. When
the DTE device changes the state of this lead, the DSU/DSU
activates or deactivates a local loopback. The default setting
is ENABLED.
RL D ETECT
Allows the user to select whether the CSU/DSU reesponds to
the local loop on the DTE connector. When the DTE device
changes the state of this lead, the CSU/DSU activates or deac-
tivates a remote loopback. The default seting is ENABLED.
Alarm Parameters
The Alarm Parameters screen (Figure 4-11) allows the user
to review and set alarm related thresholds for the unit. These
thresholds are the minimum acceptable performance levels.
To modify the parameters, highlight the desired statistic and
press the spacebar to scroll through the value selections. If
the set value is later surpassed, an alarm indication appears.
If a field is set to - - then the element does not alarm on that
statistic.
L OSS OF S IGNAL S ECONDS (LOSS)
A one-second period in which the received signal is inter-
rupted. The default is 5.
O UT O F S ERVICE S ECONDS (OOSS)
A one-second period in which the 4001 received the OOS
code. The default is 0 (shown on the screen as - - -).
O UT OF F RAME S ECONDS (OOFS)
A one-second period in which the 4001 received the OOF
code. The default is 0 (shown on the screen as - - -).
A LARM R ESET T IMER
Determines the number of seconds (from 10 to 900) after
alarm conditions clear before indications are removed. The
default is 30.
Table 4-C Normal and Long RTS-to-CTS Delays
DDS Loop Rate Normal Delay Long Delay
2.4 kbps 8
±
0.4 ms 16
±
0.8 ms
4.8 kbps 4
±
0.2 ms 8
±
0.4 ms
9.6 kbps 2
±
0.1 ms 4
±
0.2 ms
19.2 kbps 1
±
0.05 ms 2
±
0.1 ms
38.4 kbps 0.5
±
0.025 ms 1
±
0.05 ms
56 kbps 0.4
±
0.02 ms 0.8
±
0.04 ms
64 kbps 0.3
±
0.015 ms 0.6
±
0.03 ms
4001 DSU x.xx/x.xx PRISM 4001 Local Screen
4001 DSU x.xx/x.xx Unit Address: X
------------------------- ALARM CONFIGURATION --------------------------
Element: [NEAR]
Loss of Signal Seconds (LOSS):[ 5]
Out of Service Seconds (OOSS):[---]
Out of Frame Seconds (OOFS):[---]
Alarm Reset Timer (seconds):[ 30]
Figure 4 -13 Alarm Parameters