Example research essay topic: Control Panel Windows 95 - 1,345 words

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... ex, V. 34, and V. 90. 8) Additional call progress filter added to improve dial tone detection in China. 1) Added support for generating reporting functions for #UD commands. 1) Adjusted transmit levels of modulation modes. 1) Fixed a bug that caused Windows Explorer errors in previous builds. 2) Added #UD command support to modem. 3) Added Data/Fax code base to Combined Data/Fax/Speakerphone and Data/Fax/TAM code bases. All builds now use the same Vx D's. However, the install is still different for each. (# 347). 1) Windows 95 / 98 DOS box support added. (# 301). 2) Combined the Data/Fax/Speakerphone and Data/Fax/TAM code bases into one.

Both builds now use the same Vx D's. However, the install is still different for each. (# 347). 3) After a successful install, if the PC is powered OFF and the SM 56 modem board is moved to another PCI slot, although Windows re-enumerates the new hardware and the SM 56 install runs again, both instances of the SM 56 modem will now work. In earlier builds the second modem instance (the real modem) did not function. (# 379). 4) Enhanced the Upgrade Utility (invoked by running setup. exe) to retain the COM port and IRQ resources after the upgrade is complete so that communications applications will continue to function correctly. 5) The modem now correctly detects all Chinese and Korean busy signals. (# 403). 6) Eliminated the "Duplicated Device Driver" error message when upgrading from Windows 95 to Windows 98 on a PC where the SM 56 is installed. (# 408). 7) Added Italian, Spanish, and Universal International (UI) to the list of language selections in the Control Panel applet. This selects the language for the online User's Guide. (# 396). 8) Fixed a problem when ATD was issued without supplying a number. Earlier builds may cause the modem or OS to lock up or blue screen. (# 400). 9) ATM 3 turns ON call progress speaker monitoring during negotiation, and OFF during DTMF dialing and data transfer.

In previous builds the call progress monitoring was ON all the time even after issuing ATM 3. (# 399, # 404). 10) The SM 56 now operates correctly with the speaker volume controls (LOW, MEDIUM, HIGH) in the Windows Control Panel properties sheet. (# 399, # 405). 11) Fixed a problem where V. 32 bis connections would sometimes get dropped due to retrain time-outs. (# 277). 12) Fixed a problem with earlier builds where the modem drivers allowed the PC to go into standby mode on ACPI compliant machines... usually during fax and voice modes. The modem now veto's standby messages while connected in all modes. (# 346). 13) Added "wetting" pulse support for UK caller ID detection. (# 384). 14) Added software support for the telephone handset stuffing hardware option. (# 388). 1) An interoperability problem with Cisco headend's has been fixed. Previous SM 56 builds sometimes failed to connect in V. 90 and K 56 Flex modes. (# 389). 2) V. 90 throughput has been increased across the network model. The average increase is 0 - 600 characters per second over previous build. (# 372). 3) During K 56 Flex and V. 90 training the SM 56 now auto-detects if the headend uses A-Law or Mu-Law.

This eliminates problems in countries that use both companion techniques. Previous SM 56 builds used only the Country code to select between A-Law/Mu-Law. (# 317). 4) K 56 Flex fallback to V. 34 algorithm reliability has been improved. Under certain circumstances previous builds failed to connect K 56 Flex and did not correctly fall back to V. 34. (# 385). 5) Operating System blue screens and PC freezes while using Shark's Dialtone application have been fixed. With previous builds, bring up Dialtone, receive a fax, then dial to a headend. When the modem connects the OS blue screened and / or PC froze, forcing a hard boot of the PC to recover. (# 360). 6) A completely new install program has now replaced the Install Shield. Among other things, this fixes install problems if Windows is on a drive other than C. (# 118, # 377). 7) Added the parameter lists for numerous countries, including: These country selections are available via the SM 56 Control Panel application. (# 318). 8) In previous builds writing invalid data to some S-Registers returned ERROR.

This caused problems with some software applications, that wanted to see "OK", even if the registers were not being updated. To aid interoperability we have changed the controller code to return "OK" when attempting to write invalid data to some S-Registers. The S-Registers will not be updated with invalid data. (# 310, # 374). 9) Added PCI Plug-n-Play ID support for Turbo Comm. (# 368). 10) Fixed the DTMF "Twist" problem. DTMF tones are dual tones.

In previous builds the lower frequency tone was too low by 2 dB and the higher frequency tone was too low by 3 dB. (# 390). 11) The microphone and speaker gain sliders in the Control Panel applet have been modified to read unsigned 8 -bit integers from the Windows Registry. In previous builds they were read as signed -- a Registry value of greater than 128 was interpreted as a negative number and therefore the sliders in the applet were reset to 0. (# 375). 1) Reduced the transmit level of the AC tone for B 103, V 21, V 22 and V 23. It was measured at - 8. 5 dBm, which was higher that the FCC - 9. 0 dBm max. requirement. (# 367) 2) Fixed a problem with SM 56 Uninstall where it could sometimes corrupt the Registry if the modem install did not fully complete. (# 329) 3) Fixed a bug where the Control Panel application wrote a DWORD hex value to the Microphone and Speaker Gain keys in the Registry. Because the modem wants to read a byte value from this key it will not function correctly if the value is a DWORD. (# 369) 4) A problem completing digital automated test with a Courier I modem is now fixed.

The automated testing would time out every time. The problems occurred when an escape command was issued simultaneous with a DCE initiated disconnect. (# 361) 5) SC Monitor memory leak is fixed. Before multiple loads / unloads resulted in the PC becoming very tardy from lack of physical memory. (# 369) 6) Added enhancement to allow local message record and playback through the microphone and speaker jacks on the modem board using Bitware. Previously, local record and playback had to be done through the sound board jacks only.

Now, it can be done through the sound board jacks or the modem board jacks. (# 363) 1) Fixed a problem with falsely detecting inter modulation distortion (IMD) on lines with 4 dB and 8 dB digital pads. 2) V. 90 initial connect rate is now set depending on if error correction is set or not. This protects against high error rates when the modem is configured for auto-reliable mode. 3) In previous builds reference training starts at the beginning of rate renegotiation, causing equalizer and other associated problems. This has been fixed. 4) After a number of rate renegotiation's the modem falsely detected IMD. This is now fixed. 5) Earlier builds exhibit low throughput on some lines in K 56 Flex modulation mode. The connect rate and EC negotiation algorithms in the controller have been enhanced to improve throughput on these lines. 6) Fixed a Windows Registry read offset bug that may sometimes result in incorrect data to be read from the Registry. 7) Fixed a problem with pulse dialing / flash hook operation, where the modem sent out bad digits with incorrect make / break ratios. 8) Previous speakerphone builds had problems in voice mode. Dialing out did not function, and speakerphone audio was very noisy and incomprehensible.

All these issues are now fixed and speakerphone functions correctly. 1) Corrected an error in the INF install file so the Data/Fax/TAM modem will correctly install on Data/Fax/Speakerphone hardware. Bibliography:

Research essay sample on Control Panel Windows 95