Dialogic 6.2 - Manual (Page 306)

Loop Start Signaling
November 2009 306
Figure 40. FXO Loop 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
L
3L4
m
C
O
N
N
E
CT
IISD
N
T
IM
E
R
S
:
m
o
dif
ie
d_o
ut
_r
ls
_t
im
e
r
hoo
k
tim
er_
onh
k
_
m
o
d
_ou
t_
rl
s
n
o
_
ri
ng
in
g_
ti
m
e
r
ring
ing
_
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 Bit 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
TRANSMITTED
R
ECEIVE
D BITS,
Revise
d