Table of Contents
Advertisement
dvanced features _
The 109/DCD circuit
Use the following table when the central site computer requires
DCD be ON/OFF at certain times. This table shows the &C and
+U settings and the equivalent setup from front/display:
OPT1 (Option1)
fren
{Command
| Description"
menu.
|
oe
OPT1
AT&.Coges||
DCD (Carrier detect) always ON
(Optiont)
b o
regardiess of the state of the carrier
be
received
(Oot
2)
AT&C1 pal
DCD ON indicates presence of data
ption
.
carrier
OPT4
AT+U2 pial]
DCD (109) always ON except during
(Option4)
:
disconnect. This command will
Fae
override the &C command
CTS, DSR and DCD operation during loop tests.
CTS: Will always be ON during Loop3 and Remote loop2 - local
side. Will always be OFF during Loop3 with test pattern
(L3+(T+R)), Remote loop2 - remote side, Remote loop2 with self
test (RL2+(T+R)) and test pattern only (T+R).
DSR: Will always be ON during loop tests..
DCD: According to the table below (+U command).
DTE is not active
wececcnnneeeee
AT#U4 El
| CD (109) ON during test
111 /112 circuit for speed control/indication
Pin 23 (AT V.24/V 28) is used for both 111 and 112.
111: The modem
speed may be controlled from DTE by using
the 111 circuit.
112: The modem may indicate the speed by using the 112
circuit.
ON state will give high speed, and OFF state will give low speed
"Selection between the use of circuit 111 or 112 is
dependent upon correct configuration on jumper field J10.
See chapter 5.
1 2-1
6
LZTR104006 R1.00
Zat 14.4/14.4-7 and 19.2/19.2-7
Advertisement
Table of Contents
