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7. PROTECTION SWITCH
Remote provisioning for a protection switch can be
accomplished by sending a specific sequence of
in-band or out-of-band messages. These remote
provisioning commands are transmitted to the
controller card from a remote test facility or a T1 test
set at a DSX panel.
Arming
Arming the controller card prevents an inadvertent
protection switch operation. The controller card can
be armed with the presence of the appropriate in-band
or out-of-band pattern on the network receive
interface. Disarming the controller card can be
accomplished with the presence of an in-band (11100)
or out-of-band (ESF datalink) NIU loop down pattern
on the network receive interface, a 1-hour time out, a
protection switch, or a manual reset. See Figure 4 for
arming activation.
CENTRAL OFFICE
DSX-1
< Live Traffic >
DCS
T1
< Arming Code >
TEST
C
O
E
n I
B -
n a
t S
p e
C
o
m
m
n a
d
P
a
t t
r e
1
e S
d n
r A
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C
o
e d
e S
d n
S
t o l
E
n
b a
e l
2
D
s i
b a
e l
C
o
e d
e S
d n
P
o r
e t
i t c
n o
i L
3
S
w
t i
h c
C
4 4
X
w
e h
=
i l
e n
u n
m
b
r e
4
R
e
m
o
e v
a P
e t t
n r
8
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Office
Repeater
Bay
Office Repeater
or
HTU-C
T1 / HDSL / HDSL2
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or
HTU-C
WECO D4
WESCOM 3192
ARMING OPERATION
Figure 4. Arming Operation
Table 4. In-Band Enable/Disable Protocol
d
n I
B -
n a
d
s n
C
4
0 4
H
x e
r o
C
5
0 4
H
x e
E
n
b a
e l
C
6
0 4
H
x e
D
s i
b a
e l
e n
C
4 4
X
H
x e
e r
X
X
=
i L
e n
N
u
m
b
r e
Section 61190860L1-5, Issue 2
In-Band Slot Enable/Disable Protocol
See Table 4 for in-band slot enable/disable protocol.
< Live Traffic >
< Arming Codes >
P
t a
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L
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b p
c a
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CUSTOMER PREMISES
DTWA
NIU
CIM
Main
Standby
C
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R
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p
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61190860L1-5B
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