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TM
COMSPHERE 3800 Series Modems Firmware Update for Release 4.6.40 Firmware Update Sheet Document No. 3810-A2-GB41-32 October 1995 This document contains information on changes in firmware Release 4.6.40 that are not documented in the COMSPHERE 3800 Series Modems Models 3810, 3811, and 3820 User’s Guide (3810-A2-GB91-30) and the COMSPHERE 3800 Series Modems Model 3830 User’s Guide (3830-A2-GB91-10), and additional information about earlier releases. The information in this update sheet will be incorporated into future releases of the User’s Guides. In the meantime, keep this document with your User’s Guide.
New Configuration Options and Errata Table 1 shows the previously undocumented new or enhanced features and configuration options available. In the left column is the title of the change or addition, with references to related page numbers, if any, in the COMSPHERE 3800 Series Modems Models 3810, 3811, and 3820 User’s Guide (shown as 3810) and the COMSPHERE 3800 Series Modems Model 3830 User’s Guide (shown as 3830). In the right column is information about the change. Information may include the front panel configuration options group for modems with a shared or integral Diagnostic Control Panel (DCP), and AT command equivalents for all 3800 Series modems. Where possible, table entries are in order by AT command name or S-register number.
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Table 1 (1 of 7) New Features and Changes Feature or Configuration Option Bn CCITT/Bell Mode 3810: (Undocumented) 3830: (Undocumented)
Notes Determines the protocol used if the dial-line rate is set to 300 or 1200 bps. It has no effect if the rate is set to another value. (See %B.) B, B0
V.21 or V.22 (300 or 1200 bps)
B1
Bell 103 or Bell 212A (300 or 1200 bps)
The factory default is B1.
&D5 DTR Action: CntrlsTXMute
The DTR Action configuration option of the DTE Interface configuration options group has a new selection: CntrlsTXMute. The AT command equivalent is &D5.
3810: pp. 8-15, 13-16
Controls TX Mute operates like the Standard RS232 selection, except that when DTR is lowered at the answering modem, the modem mutes transmitter output.
3830: p. 4-15
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Table 1 (2 of 7) New Features and Changes Feature or Configuration Option \N Error Control Mode 3830: p. 4-26
Notes The Error Control Mode configuration option of the V.42/MNP/Buffer configuration options group determines the type of error control used by the modem. This configuration option is only available if Async/Sync Mode is configured for Async. The new selections LAPM_or_Disc and LAPM_or_Buffr are not in the 3830 guide. LAPM or Disconnect (\N6) – Modem attempts to connect in V.42 Link Access Procedure for Modems (LAPM) error control mode. If this fails, the modem disconnects. This setting should be used for cellular connections (at both the mobile and PSTN sides) when it is known that both sides support V.42. LAPM or Buffer (\N7) – Modem attempts to connect in V.42 LAPM error control mode. If this fails, the modem connects in Buffer mode and continues operation. The default settings have not changed. For Async Dial and UNIX Dial, V42/MNPorBfr is the factory default; for Sync Dial and Sync Leased, DirectMode is the factory default; for Cellular, V.42/MNP or Disconnect is the default. The AT command equivalent is \N: \N0
Buffer Mode
\N1
Direct Mode
\N2
MNP or Disconnect
\N3
MNP or Buffer
\N4
V.42/MNP or Disconnect
\N5
V.42/MNP or Buffer
\N6
LAPM or Disconnect
\N7
LAPM or Buffer
The factory default is \N5.
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Table 1 (3 of 7) New Features and Changes Feature or Configuration Option %Bn Modulation and Data Rate 3810: (Undocumented) 3830: (Undocumented)
Notes Sets the modulation and maximum VF rate. The %B300 and %B1200 commands work in conjunction with the Bn (CCITT/ Bell Mode) command to determine modulation. %B19200
V.32terbo, maximum rate 19,200 bps
%B16800
V.32terbo, maximum rate 16,800 bps
%B14400
V.32bis, maximum rate 14,400 bps
%B12000
V.32bis, maximum rate 12,000 bps
%B9600
V.32bis/ V.32, maximum rate 9600 bps
%B7200
V.32bis, maximum rate 7200 bps
%B4800
V.32bis/ V.32, maximum rate 4800 bps
%B2400
V.22bis, maximum rate 2400 bps
%B1200
V.22 or Bell 212A, maximum rate 1200 bps
%B300
V.21 or Bell 103, maximum rate 300 bps
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Table 1 (4 of 7) New Features and Changes Feature or Configuration Option
Notes Modulation and Data Rate can also be set using S-register S41. The following list shows the equivalent values of S41 for each %Bn value, and, where applicable, %Bn in combination with Bn. Note that S41 values of 12, 13, 18 and 19 (for V.23) are no longer supported. S41 = 20
%B19200
V.32terbo, 19,200 bps
S41 = 21
%B16800
V.32terbo, 16,800 bps
S41 = 1
%B14400
V.32bis, 14,400 bps
S41 = 2
%B12000
V.32bis, 12,000 bps
S41 = 3
%B9600
V.32bis/ V.32, 9600 bps
S41 = 4
%B7200
V.32bis, 7200 bps
S41 = 5
%B4800
V.32bis/ V.32, 4800 bps
S41 = 6
%B2400
V.22bis, 2400 bps
S41 = 7
%B1200/B0
V.22, 1200 bps
S41 = 8
%B1200/B1
Bell 212A, 1200 bps
S41 = 10
%B300/B0
V.21, 300 bps
S41 = 11
%B300/B1
Bell 103J, 300 bps
The factory default is %B19200.
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Table 1 (5 of 7) New Features and Changes Feature or Configuration Option
Notes
%Rn DTE Rate
Sets the rate at which data is passed between the modem and the DTE.
3810: (Undocumented) 3830: (Undocumented)
S2: Escape Character 3810: pp. 8-24, 13-27 3830: p. 4-29 S34: 1800 Hz Training Tone 3810: (Undocumented) 3830: (Undocumented)
%R must be the last command on the command line. Setting the DTE rate with the %R command does not turn off autobauding. %R115200
Sets the DTE rate to 115,200 bps
%R76800
Sets the DTE rate to 76,800 bps
%R57600
Sets the DTE rate to 57,600 bps.
%R38400
Sets the DTE rate to 38,400 bps.
%R19200
Sets the DTE rate to 19,200 bps.
%R14400
Sets the DTE rate to 14,400 bps.
%R9600
Sets the DTE rate to 9600 bps.
%R7200
Sets the DTE rate to 7200 bps.
%R4800
Sets the DTE rate to 4800 bps.
%R2400
Sets the DTE rate to 2400 bps.
%R1200
Sets the DTE rate to 1200 bps.
%R300
Sets the DTE rate to 300 bps.
Determines the ASCII value used for the escape sequence. The factory setting is 43 (+ symbol). The valid range is from 1 to 255. Any value over 127 disables the use of an escape character, and makes it impossible to return to Command mode until a disconnect occurs. This configuration option is for communicating with certain modems that do not comply with the V.32 standard. When 1800 Hz Training Tone is enabled, a short burst of 1800 Hz (AC) tone is sent to the answering modem to prompt it to answer. This is not required for V.32-compliant modems. Register has the following values: 0 = Disable 1 = Enable Factory setting is Disable. This configuration option is also available from the front panel, in the Leased Line configuration options group under the Configure branch. 6
Table 1 (6 of 7) New Features and Changes Feature or Configuration Option S35: (Leased Line) Auto Redial S37: DTR Auto Redial 3810: p.13-31 3830: p. 4-32
Notes The DTR Auto Redial configuration option of the Line Dialer configuration options group no longer represents the same internal setting as that accessed with the Auto Redial configuration option in the Leased_Line group. Auto Redial of the Leased Line group is moved to the new S-register S35. Both types of Auto Redial settings define the number of directory locations the modem may access when prior dialing attempts fail. For example, the front panel selection Dirs 1–10 means that all ten directory locations may be tried. The default is directory location 1 only. The AT command equivalent for (Leased Line) Auto Redial is S35 = n: S35 = 0 S35 = 1 S35 = 2 S35 = 3 S35 = 9
Use directory location 1 (default) Use directory locations 1– 2 Use directory locations 1– 3 Use directory locations 1– 4 Use directory locations 1–10
The AT command equivalent for DTR Auto Redial is S37 = n: S37 = 0 S37 = 1 S37 = 2 S37 = 3 S37 = 9
Use directory location 1 (default) Use directory locations 1– 2 Use directory locations 1– 3 Use directory locations 1– 4 Use directory locations 1–10
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Table 1 (7 of 7) New Features and Changes Feature or Configuration Option S80: No Data Disconnect Trigger Signal 3810: p. 9-23 3830: p. 4-40
Notes The No Data Disconnect Trigger Signal configuration option of the Line Dialer configuration options group works in conjunction with No Data Disconnect (\T). It determines whether Pin 2 (transmit data) or Pin 3 (receive data) of the modem’s RS-232 serial interface is monitored so that the modem can disconnect the call if there is no activity for a certain period of time. The period is established with the No Data Disconnect configuration option \Tn, where n is a number of minutes from 0 to 255. A value of 0 disables the No Data Disconnect configuration option, and makes the No Data Disconnect Trigger Signal configuration option unavailable. On the DCP, the No Data Disconnect Trigger Signal configuration option follows the NoDataDisc configuration option in the Line Dialer group, if NoDataDisc is not Disable. The AT command equivalent is S80 = n. The loading of factory defaults (with an &F command) does not affect the No Data Disconnect or No Data Disconnect Trigger configuration options.
Leased Line 3810: pp. 8-43–8-50
There are several corrections to the Leased Line Configuration Options table. All references to “8-wire” should read “4-wire.” The DTE rate must equal the VF rate only in asynchronous mode using V.22bis. The two rates may differ when using V.32bis or V.32terbo with V.42 error correction or buffer mode. Leased line configuration parameters appear when the Sync Leased factory preset template is selected, or when the &L1, &L2, &L3, or &L4 command is issued.
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