* These default settings are for the United States and Canada. If you
are in another country, settings may be slightly different.
** Bit-mapped registers have up to eight functions.
Register
|
Default
|
Function
|
S0
|
0
|
Sets the number of rings on which to answer in Auto
Answer mode. S0=0 disables Auto Answer. S0=1 enables Auto Answer and
the Courier 56K Corporate modem answers on the first ring. |
S1
|
0
|
Counts and stores the number of rings from an incoming
call. |
S2
|
43
|
Stores the ASCII decimal code for the escape code character.
Default character is +. A value of 128-255 disables the
escape code. |
S3
|
13
|
Stores the ASCII decimal code for the Carriage Return
character. Valid range is 0-127. |
S4
|
10
|
Stores the ASCII decimal code for the Line Feed character.
Valid range is 0-127. |
S5
|
8
|
Stores the ASCII decimal code for the Backspace character.
A value of 128-255 disables the Backspace key's delete function. |
S6
|
0
|
Set the number of seconds the Courier 56K Corporate
modem waits for a dial tone. |
S7
|
60
|
Sets the number of seconds the Courier 56K Corporate
modem waits for a carrier. May be set for much longer duration if,
for example, the Courier 56K Corporate modem is originating an international
connection. |
S8
|
2
|
Sets the duration, in seconds, for the pause (,) option
in the Dial command and the pause between command reexecutions (>
and A> commands). |
S9
|
6
|
Sets the required duration, in tenths of a second, of
the remote device's carrier signal before recognition by the Courier
56K Corporate modem. |
S10
|
14
|
Sets the duration, in tenths of a second, that the Courier
56K Corporate modem waits after loss of carrier before hanging up.
This guard time allows the Courier 56K Corporate modem to distinguish
between a line hit, or other disturbance that momentarily breaks the
connection, from a true disconnect (hanging up) by the remote device. |
S11
|
70
|
Sets the duration and spacing, in milliseconds, of dialed
tones. |
S12
|
50
|
Sets the duration, in fiftieths of a second, of the
guard time for the escape code (+++) sequence. |
S13
|
0
|
Bit-mapped register. See the beginning of this chapter
for information about setting bit-mapped registers. |
|
Bit
|
Value
|
Result
|
0
|
1
|
Reset when DTR drops. |
1
|
2
|
Reverse normal Auto Answer operation: On incoming RING,
enter Originate Mode and look for an answer tone. |
2
|
4
|
Disable 250 ms pause before result code display. |
3
|
8
|
On DTR signal, autodial the number stored in NVRAM at
position 0 (external Courier 56K Corporate modem only). |
4
|
16
|
At power-on/reset, autodial number stored in NVRAM at
position 0. |
5
|
32
|
Disable HST (used for testing V.32terbo in Dual Standard
Courier 56K Corporate modems). |
6
|
64
|
Disable MNP Level 3 (used for testing Level 2). |
7
|
128
|
Hardware reset (works like powering off and then on).
|
S14
|
1
|
Bit-mapped register ( See the beginning of this chapter
for information about setting bit-mapped registers). |
|
Bit
|
Value
|
Result
|
0
|
1
|
Disconnect on escape code. |
S15
|
0
|
Bit-mapped register. ( See the beginning of this chapter
for information about setting bit-mapped registers). |
|
Bit
|
Value
|
Result
|
0
|
1
|
Disable the Courier 56K Corporate modem's extra high-frequency
equalisation if it causes problems on shorter-link calls for HST modulation
only. |
1
|
2
|
Disable online fallback. |
2
|
4
|
Disable 450 bps back channel* HST only. |
3
|
8
|
Reset non-ARQ mode Transmit buffer from 1.5K bytes to
128.* (for the convenience of BBS operators taking calls from remote
users of slower modems). |
4
|
16
|
Disable MNP Level 4; retransmitting the larger Level
4 data blocks may be a problem if you expect a great number of errors
during a call. |
5
|
32
|
Set Backspace key to delete. |
6
|
64
|
Some earlier 2400 bps MNP Courier 56K Corporate modems,
not made by USRobotics or Microcom, were not fully compatible with
the MNP protocol. If you have difficulty making a successful 2400
bps MNP connection with a remote MNP modem, it may be because of this
incompatibility. Set S15 to 64 and try again to make the connection.
|
7
|
128
|
Custom applications only.
The default 1.5K byte non-ARQ buffer allows data transfer with X-
and Y-modem type File Transfer Protocols without using flow control.
The 128-byte option allows remote users with slower modems to stop
your transmitted data from scrolling off their screens. When remote
users send your computer an XOFF (<Ctrl-S>) and you stop transmitting,
the data in transit doesnt exceed the size of their screen.
|
S16
|
0
|
Bit-mapped register. ( See the beginning of this chapter
for information about setting bit-mapped registers). For testing,
refer to the Testing the Connection chapter of the Contents section.
|
|
Bit
|
Value
|
Result
|
1
|
2
|
Dial Test.
|
2
|
4
|
Test pattern.
|
3
|
8
|
Remote digital loopback.
|
S18
|
0
|
Test timer for software-initiated loopback testing (&Tn);
disabled when S18 is set to 0. Used to set the duration of testing,
in seconds, before the Courier 56K Corporate modem automatically times
out and terminates the test. |
S19
|
0
|
Sets the duration, in minutes, for the Inactivity Timer.
The timer activates when there is no data activity on the R232 interface,
and at the timeout the Courier 56K Corporate modem hangs up. S19=0
disables the timer. |
S21
|
10
|
Sets, in 10-millisecond units, the length of breaks
sent from the Courier 56K Corporate modem to the computer or terminal.
Applies to ARQ mode only. |
S22
|
17
|
Stores the ASCII code for the XON character. |
S23
|
19
|
Stores the ASCII code for the XOFF character. |
S24
|
150
|
Sets the duration, in 20-millisecond units, between
pulsed DSR signals when the Courier 56K Corporate modem is set to
&S2 or &S3. The default is 3 seconds. |
S25
|
5
|
Sets DTR recognition time in 10-millisecond units. |
S26
|
1
|
Sets duration, in 10-millisecond units, of the delay
between RTS and the CTS in synchronous mode. |
S27
|
0
|
Bit-mapped register. ( See the beginning of this chapter
for information about setting bit-mapped registers). |
|
Bit
|
Value
|
Result
|
0
|
1
|
Enable ITU-T V.21 modulation at 300 bps for overseas
calls. In V.21 mode, the Courier 56K Corporate modem answers both
Bell 103 and V.21 calls, but only originates V.21 calls.
|
1
|
2
|
Enable unencoded (non- trelliscoded) modulation
in V.32 mode; this option is part of the ITU-T V.32 recommendation,
but is rarely used.
|
2
|
4
|
Disable V.32 modulation; used for testing HST modulation.
|
3
|
8
|
Disable 2100 Hz answer tone to allow two V.42 devices
to connect more quickly.
|
4
|
16
|
See next page.
|
5
|
32
|
See next page.
|
6
|
64
|
Disable V.42 Detect Phase
|
7
|
128
|
Unusual software incompatibility. Some software
may not accept some result codes. This setting disables the codes
and displays the 9600 code instead. The call's actual rate can be
viewed on the ATI6 screen.
|
Error control handshaking options: Select the total
value of bits 4 and 5
|
Bit 4
|
Bit 5
|
Result
|
0
|
0
|
Complete handshaking sequence: V.42 Detection, LAPM
error control, MNP.
|
16
|
0
|
Disable MNP.
|
0
|
32
|
Disable V.42 Detection and LAPM. |
16
|
32
|
Disable Detection phase, if you know that the remote
Courier 56K Corporate modem does LAPM, but not the Detection phase.
|
S28
|
8
|
Sets the duration in tenths of a second of the extra
3000/600 Hz answer tones sent during V.32 hand-shaking. This gives
V.32 modems additional time to connect in V.32 mode before timing
out.
If there is difficulty answering older, manually operated V.32 modems
(for example, modems that require a button to be pushed in order to
dial), try lengthening the duration of the extra tones.Setting S28
to zero eliminates the extra tones resulting in a faster connect time
if, for example, the Courier 56K Corporate modem is set to use V.21
modulation (300 bps) or V.23 modulation (1200 bps). |
S29
|
20
|
Sets the duration, in tenths of a second, of the V.21
answer tone. |
S32
|
9
|
For External modems only: Assign Voice/Data switch function
|
|
Value
|
Function
|
0
|
Disabled |
1
|
Voice/Data- originate mode |
2
|
Voice/Data- answer mode |
3
|
Redial last number |
4
|
Dial number stored at position 0 |
5
|
Auto answer on/off toggle |
6
|
Reset modem |
7
|
Initiate remote digital loopback |
8
|
Busy out the phone line toggle |
9
|
Execute stored command |
S34
|
0
|
Bit-mapped register. See the beginning of this chapter
for information about setting bit-mapped registers. |
|
Bit
|
Value
|
Result
|
0
|
1
|
Disable V.32 bis. Used for troubleshooting; Technical
Support may ask you to disable V.32bis for testing purposes.
|
1
|
2
|
Disable the Courier 56K Corporate modem's enhanced,
proprietary V.32bis modulation. Used for troubleshooting.
|
2
|
4
|
Disable the faster retrains that occur during proprietary
V.32 terbo modulation. Used for troubleshooting.
|
3
|
8
|
Enable V.23. Required for some British connections.
|
4
|
16
|
Change MR to DSR
|
6
|
64
|
Disable the remote-access busy message.
|
7
|
128
|
Disable V.32 terbo.
|
S38
|
0
|
Sets the duration, in seconds, before a forced hang-up and clearing
of the Transmit buffer when DTR drops during an ARQ call.
This is provided to allow time for a remote device to acknowledge
receipt of all transmitted data. Default = 0: The Courier 56K Corporate
modem immediately hangs up when DTR drops. If the Courier 56K Corporate
modem receives the ATH command, it ignores S38 and immediately hangs
up.
|
S41
|
0
|
Sets the number of allowable remote-access login attempts, thus
enabling or disabling remote access.
The default setting of zero allows no remote login attempts, disabling
remote access. A value of 1 or greater enables remote access. If
the number of unsuccessful login attempts exceeds the limit set
by this register, the Courier 56K Corporate modem returns online
and any further login attempts during the remainder of that connection
are refused.
|
S42
|
126
|
Stores the ASCII decimal code for the remote-access
escape character. The default character is a tilde (~). |
S43
|
200
|
Sets the duration, in fiftieths of a second, of the
guard time for the remote-access (~~~~) sequence. |
S44
|
15
|
Sets the duration, in seconds, of the interval between
losing carrier and reestablishing a connection. |
S51
|
0
|
Bit-mapped register. See the beginning of this chapter
for information about setting bit-mapped registers. |
|
Bit
|
Value
|
Result
|
0
|
1
|
Disable MNP/V.42 for V.22 (1200 bps)
|
1
|
2
|
Disable MNP/V.42 for V.22 bis (2400 bps)
|
2
|
4
|
Disable MNP/V.42 for V.32/V.32 bis/V.32 terbo (9600/14400/19200/21600
bps).
|
6
|
64
|
Disable Selective Reject
|
S53
|
126
|
Bit-mapped register. ( See the beginning of this chapter
for information about setting bit-mapped registers). |
|
Bit
|
Value
|
Result
|
0
|
1
|
Dial security enabled.
|
1
|
2
|
Prompting enabled.
|
2
|
4
|
Local-access password protection enabled.
|
3
|
8
|
DTMF security enabled.
|
Enabling local-access password protection disables
the &Zn=s command (which stores up to 10 phone numbers) because
stored phone numbers occupy the same space in NVRAM as the dialback
numbers for Dial Security accounts.
|
S54
|
64
|
Symbol rate bit-mapped register used primarily by Technical
Support for debugging purposes. |
|
Bit
|
Value
|
Result
|
0
|
1
|
Disable 2400 symbol rate.
|
1
|
2
|
Disable 2743 symbol rate.
|
2
|
4
|
Disable 2800 symbol rate.
|
3
|
8
|
Disable 3000 symbol rate.
|
4
|
16
|
Disable 3200 symbol rate.
|
5
|
32
|
Disable 3429 symbol rate. |
6
|
64
|
Disable Call Indicate (CI).
|
7
|
128
|
Disable V.8.
|
S55
|
0
|
Trellis code bit-mapped register used primarily by U.S.
Robotics Technical Support for debugging purposes. |
|
Bit
|
Value
|
Result
|
0
|
1
|
Disable 8S-2D mapping.
|
1
|
2
|
Disable 16S-4D mapping.
|
2
|
4
|
Disable 32S-2D mapping.
|
3
|
8
|
Disable 64S-4D mapping.
|
7
|
128
|
Enable phase roll detection
|
S56
|
0
|
Bit-mapped register primarily used by Technical Support
for debugging purposes. |
|
Bit
|
Value
|
Result
|
0
|
1
|
Disable non-linear coding.
|
1
|
2
|
Disable TX level deviation.
|
2
|
4
|
Disable preemphasis.
|
3
|
8
|
Disable precoding.
|
4
|
16
|
Disable shaping.
|
5
|
32
|
Disable V.34+
|
6
|
64
|
Disable V.34.
|
7
|
128
|
Disable V.FC.
|
S58
|
0
|
Bit-mapped register. (See the beginning of this chapter
for information about setting bit-mapped registers.) |
|
Bit
|
Value
|
Result
|
0
|
1
|
Disable x2 |
1
|
2
|
Disable Bler Monitor
|
5
|
32
|
Enables/Disables V.90 |
S59
|
0
|
Bit-mapped register. (See the beginning of this chapter
for information about setting bit-mapped registers). |
|
Bit
|
Value
|
Result
|
0
|
1
|
Enhanced V.42bis
|
1
|
2
|
Alternate Caller ID timing
|
S69
|
0
|
Bit-mapped register. (See the beginning of this chapter
for information about setting bit-mapped registers). |
|
Bit
|
Value
|
Result
|
0
|
1
|
External Plug and Play
|
1
|
2
|
Auto Redia
|
2
|
4
|
Reserved
|
3
|
8
|
Reserved
|
4
|
16
|
Reserved
|
5
|
32
|
Digital Line Guard
|
6
|
64
|
Loop Monitor
|
12
|
4096
|
High Speed LED
|
S70
|
0
|
Bit-mapped Register. (See the beginning of this chapter
for information about setting bit-mapped registers.) |
|
Bit
|
Value
|
Result
|
0
|
1
|
Enable recognition of Ring A
|
1
|
2
|
Enable recognition of Ring B
|
2
|
4
|
Enable recognition of Ring C
|
3
|
8
|
Enable recognition of Ring D
|
4
|
16
|
Enable recognition of Ring E
|