Verilink PRISM 4051 (34-00253.2) Product Manual - Manual (Page 14)

8 C HAPTER 2: I NSTALLATION
DTE Alarm
Switch S1-8 is used to enable or disable
the DTE alarm as shown in Table 2-7.
The DTE alarm is generated when DTR
from the DTE is false.
Configuration
Switch S2
Switch S2 (Figure 2-3) configures the antistream timer, V.54 loop, circuit
assurance, loop mode, supervisory port rate, and NMS port rate.
Antistream Timer
Switch S2-1 is
used to set the
Antistream Timer
as shown in
Table 2-8.
V.54 Loop Detection
Switch S2-2 is
used to enable
V.54 loop
detection as shown
in Table 2-9.
Circuit Assurance
Switch S2-3 selects whether the CTS control lead
responds to the data signal from the network as
shown in Table 2-10. When Circuit Assurance is On
and the unit is receiving idle code (i.e., DCD is Off),
the 4051 turns the CTS lead off. When Circuit
Assurance is turned off, the state of the CTS control lead is not affected by the
data signal from the network.
Loop Mode
Switch S2-4 is
used to select the
loopback method
as shown in
Table 2-11.
Table 2-7 DTE Alarm
DTE Alarm S1-8
Disable Down
Enable Up
Figure 2-3 Switch S2
7 6 5 4 3 2 1
Do
wn
Up
8
An
ti
st
re
a
m
V
.5
4
Loop
Ci
rc
ui
t
NMS NMS Ti
m
er
En
abl
e
Po
rt
R
a
te
Po
rt
R
a
te
S
uper
v
is
o
ry
Po
rt
R
a
te
As
su
ra
n
c
e
Lo
op
Mo
d
e
S
uper
v
is
o
ry
Po
rt
R
a
te
Switch
S2
Table 2-8 Antistream Timer
Antistream Timer S2-1
Off Down
30 Seconds Up
Table 2-9 V.54 Loop Detection
V.54 Loop S2-2
Enable Down
Disable Up
Table 2-10 Circuit Assurance
Circuit Assurance S2-3
Enable Up
Disable Down
Table 2-11 Loop Mode
Loop Mode S2-4
Bidirectional Down
Unidirectional Up