Dialogic 6.2 - Manual (Page 293)

Ground Start Signaling
November 2009 293
Figure 32. FXO Ground Start – Outgoing Call Timing Diagram
IISD
N
SM
I
M
E
S
S
A
G
ES
:
L
4
L
3
m
C
AL
L
_
R
EQU
EST
L
3L4
m
P
RO
GR
E
S
S
L3
L4
m
S
EI
ZE
_C
OM
P
L
3L4
m
C
O
N
N
E
CT
IISD
N
T
IM
E
R
S
:
fa
ke
_
a
n
s
w
e
r_
tim
e
r
h
o
o
k
ti
m
e
r_o
ff
h
oo
k
_
an
s
w
e
r
hoo
k
tim
er_
onh
k
_
m
o
d
_ou
t_
rl
s
fi
x
ed_
pa
us
e_
ti
m
e
r
R
E
C
E
IVE H
O
O
K
SW
IT
C
H
, FXS:
A Bit B Bit T
R
A
N
SM
IT
H
O
O
K
SW
IT
C
H
, FXO:
N
O
T
E
: N
o
d
ig
its a
re
co
lle
cte
d
o
n
th
e
fa
r e
n
d
in
th
is m
o
d
e
.
A Bit B
B
it
(ig
nor
ed)
NO
TE
: Thi
s
d
iag
ram
is
de
s
ign
ed t
o
give
t
he r
e
a
der
a ge
ner
al un
de
rs
ta
n
d
ing
of
t
h
e
s
equ
en
c
e
of
ev
en
ts
f
o
r t
h
is
r
o
b
bed
bit
pr
ot
oc
o
l ov
er t
im
e
. Th
e t
im
e
rs
and
s
pac
in
g on
t
h
is
gr
ap
h ar
e no
t
p
ro
por
ti
ona
l t
o
t
h
e
ac
tu
a
l ev
ent
s
t
h
at
oc
c
u
r.
Re
vis
e
d 10
-No
v
-9
8
Re
vis
ion
1.
3
RE
CEIVE
D B
IT
S
,
TRANS
M
ITTED
Revised
20-Oct-03
Rev 1.4