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About the Vanguard 6435/6455 1-13
PRI Supplementary Service
Figure 1-8. Facilities Messages
Figure 1-9. Connectionless Message
Frame Relay
QSIG
QSIG
PBX
PBX
QSIG
101
201
401
PBX
3
)
P
B
X
@
2
0
1
s
e
n
d
s
F
a
c
i
l
i
t
y
M
e
s
s
a
g
e
t
o
S
i
g
n
a
l
F
o
r
w
a
r
d
e
d
S
t
a
t
e
2
)
U
s
e
r
@
1
0
1
C
a
l
l
U
s
e
r
@
2
0
1
4
)
P
B
X
@
1
0
1
t
e
a
r
s
d
o
w
n
c
a
l
l
@
2
0
1
a
n
d
p
l
a
c
e
s
n
e
w
c
a
l
l
t
o
U
s
e
r
@
4
0
1
1) User @201 has calls
forwarded to User @401
Frame Relay
QSIG
QSIG
PBX
PBX
QSIG
101
201
401
PBX
2
)
P
B
X
@
2
0
1
t
r
a
n
s
f
e
r
s
c
a
l
l
t
o
V
o
i
c
e
M
a
i
l
3
)
C
o
n
n
e
c
t
i
o
n
s
M
e
s
s
a
g
e
s
e
n
t
t
o
l
i
g
h
t
M
e
s
s
a
g
e
L
i
g
h
t
1) User @201 calls
User @401, No Answer