Telebit T1600 Reference Manual page 91

X11 Similar to X1, except that the
number after the CONNECT
message reflects the DTE
interface speed rather than the
modulation speed. The result
codes are as follows:
NUMERIC
0
1
2
3
4
5
10
11
48
12
49
13
14
15
VERBOSE
OK
CONNECT300
RING
NO CARRIER
ERROR
CONNECT 1200
CONNECT 2400
CONNECT 4800
CONNECT 7200
CONNECT 9600
CONNECT 12000
CONNECT 14400
CONNECT 19200
CONNECT 38400
X12 Supports the X11 result codes
and adds the following:
NUMERIC VERBOSE
6 NO DIAL TONE
7 BUSY
52 ARING
53 DIALING
When dialing using XO, Xl or Xl 1, the BUSY
signal will not be recognized since the BUSY
result code has not been enabled, and the
T1600 modem will perform ,a blind wait
before dialing.
When dialing using X2 or Xl2, the functional-
ity associated with the enabled result codes
will also be enabled. In particular, the BUSY
signal will be detected, and the modem will
require dial tone before dialing, even if the W
modifier is not entered.
AT Command Decsriptions 5-13