ZyXEL Communications 2864 User Manual
Page 103
8–17
S39 Bit-mapped register, default: 32:
S40 Bit-mapped register, default: 0:
(3)
0
0
CD tracks the carrier. (Default)
1
8
The CD on/off sequence follows the UNIX
standard. CD is turned ON before the con-
nection message is sent and CD is turned
OFF after the last DCE response is sent. (A
UNIX system needs CD ON to enable serial
port receiving.) (See
&C1
,
S21b4
.)
(2,1)
Reserved.
(0)
1
1
Enables repeat dialing of the default number
if not connected. (See also
*Dn
,
S29
)
Code
Bits
Bin.
Dec.
Description
(7,6)
Reserved.
(5)
1
32
Disables scrambler/descrambler in V.26bis
mode. Enables compatibility with older
V.26bis modems which have no such unit.
(4)
1
16
Class 2 fax with DTE speed shifting;
+FCON
at current DTE rate; next phase at 19200.
(3)
1
8
Class 2 fax with Bitfax compatibility;
+FCON
at 2400 and shift to 19200 at next phase.
(2)
1
4
Reverses the answer; the modem answers in
originate mode.
(1, 0)
Reserved.
Code
Bits
Bin.
Dec.
Description
(7)
Reserved.
(6)
1
64
Enables type 4 ring detection.
(5)
1
32
Enables type 3 ring detection.
(4)
1
16
Enables type 2 ring detection.
(3)
1
8
Enables type 1 ring detection.
(2)
1
4
Enables caller ID detection. (See
S24b2
,
*T
)
Code
Bits
Bin.
Dec.
Description