Dialogic 6.2 - Manual (Page 297)

Ground Start Signaling
November 2009 297
Figure 35. FXS Ground Start – Incoming Call Timing Diagram
II
SD
N
SM
I M
E
S
S
A
G
ES
:
L4L
3m
ALE
R
T
IN
G
_R
E
Q
U
E
S
T
or
L4L3m
PR
O
G
R
E
SS
_R
E
Q
U
E
S
T
L4L3m
C
O
N
N
E
C
T
_
R
E
Q
U
E
S
T
L3L4m
PR
E_S
E
IZ
E
L3L4mS
E
TU
P
_
IN
D
II
S
DN T
IM
E
RS
:
hook
ti
mer
_onhook
_r
ls
m
odi
fi
ed_i
n
_
rl
s
_
ti
me
r
hook
ti
mer
_onhk
_m
od_i
n_r
ls
fi
rs
t_
indi
gi
t_
ti
me
r
dpt
im
er
_i
mm
ed_del
a
y
RE
C
E
IV
E
HO
OK
S
W
IT
CH,
F
X
O:
A Bi
t
B
B
it
(
ignor
ed)
T
R
A
N
S
M
IT
H
O
O
K
S
W
IT
C
H
, F
X
S
:
N
O
TE:
N
o
di
gi
ts
ar
e c
o
llec
ted on t
he near
end i
n
t
h
is
m
ode.
A Bi
t
B Bi
t
N
O
T
E
: Thi
s
di
agr
am
i
s
des
igned t
o
gi
ve
the r
eader
a gener
al
under
s
tandi
ng of
t
he
s
equenc
e of
ev
e
n
ts
f
o
r t
h
is
r
obbed
bi
t pr
ot
oc
ol
over
t
ime.
The t
im
e
rs
and s
pac
ing on t
h
is
gr
aph ar
e not
pr
opor
ti
onal
t
o
t
he ac
tual
event
s
t
hat
oc
c
u
r.
R
e
vi
s
ed 10-
N
o
v-
98
R
e
vi
s
ion 1.
3
R
ECEIV
E
D B
ITS,
TRANSMITTED
Revise
d