AT&T DEFINITY 7200 series - Manual (Page 32)

1-12 TRANSMISSION STATES
_ ___________________________________________________________________________________________________________________________
_ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________
DCE
ORIGINATING
DCE
DESTINATION SWITCH
RS-232 RS-232 RAW BITS DCP DCP 1
DTE
2 DMI ASCII ASCII
3-7 USER DEFINED
D
I
G
I
T
A
L
P
O
R
T
D
I
G
I
T
A
L
P
O
R
T
D
I
G
I
T
A
L
P
O
R
T
D
I
G
I
T
A
L
P
O
R
T
DATA
MODULE
DATA
MODULE
DATA
MODULE
DATA
MODULE
DTE
DTE
DATA
MODULE
DS1
PORT
1
D
I
G
I
T
A
L
P
O
R
T
RAW BITS RS-232 DS1 FORMAT DCP
DMI ASCII 2
P
O
R
T
D
S
1
DTE
T
R
U
N
K
P
O
R
T
A
N
A
L
O
G
ADU ADU DTE
E
I
A
P
O
R
T
E
I
A
P
O
R
T
DTE
DMI ASYNCH ASCII ASYNCH ASCII 2
3-7 USER DEFINED
RS-232 RS-232 ADU PROT ADU PROT 1 RAW BITS
3-7 USER DEFINED
VOICE GRADE DATA ASCII ASCII 2
ANALOG ANALOG 1 PCM RS-232 RS-232
P
O
R
T
A
N
A
L
O
G
L
I
N
E
A
N
A
L
O
G
P
O
R
T
DTE
DTE
MODEM
POOLING
CABLE
MODEM
MODEM
MODEM
PCM
3-7 USER DEFINED
Figure 1-3. Transmission States for Data Transmission