PCtel does not manufacture modems. They make chipsets and sell them to other companies. If you need drivers or updates, you will need to figure out who made your modem. See below...

Received 06/24/1997
---ROSENET TECH NOTE: This information is accurate for first generation Pentium (P5) based computers. We have not seen the "throttling" problem on any Celeron, Pentium II or later generation processor based computers. If you are having disconnect problems, you may want to check out our Init String list---

Hello,
Here's some information from PC-Tel about the disconnects.
UPDATE on dropped connections:
It has been found that when your video card driver is set above 256
colors (16 bit or 24 bit), the modem would drop the connection for no apparent reason.
Either set your video driver to 640 by 480 at 256 colors when using the modem or try the solutions below:

I.
If your video card uses any S3 chipset, make sure the following lines are in the SYSTEM.INI:

[Display]
BusThrottle=1
If the section does not exist, create it and add the BusThrottle
statement.
If it does exist and the BusThrottle statement is there, but it is not set to 1, change it to match the line above.
This has been tested by many end users and the PCtel engineers. PCtel guarantees that this solves the problem for graphic cards using the S3 chipset. It has been reported that this solution also works for the Light Speed 128 from S.T.B. with the Tseng E6000 chip set.

II.
In Control Panel -> System -> Performance -> Graphics, set the hardware acceleration to None.

You may not have to reduce the acceleration all the way to None. You can try reducing the acceleration one step at a time for most cards. Deeper color and higher resolution and slower computers require that the
acceleration be curtailed further. PCtel's testing shows that if you are using a MAtrox MGA you need to set the hardware acceleration to None.

PCtel has discussed the BusThrottle issue with S3 Engineers who wrote the drivers. They have described a problem where by using an S3 Driver provided by Windows 95 will cause a failure and in Hardware modems shows up as lower throughput or degradation. They have recommended the use of
the latest S3 Drivers. You can
download them from S3's WEB site.

If you are unsure what S3 chip you have or if you have a S3 chip in your video card, download the S3 Chip Identify Utility Version 5 and run the program to determine exactly what S3 chipset is used.

If this solves your problem, please report the graphic card that you have so we can develop a list of models that this solution works for.

If this does NOT solve your problem, please also report the graphic card that you have so this information can be passed to the PCtel engineers.

PCtel is working on a permanent solution to this problem, however since this is a problem that is being generated by the BURST Interrupt allocation function of the new PCI cards, and each card has a different method of using system resources, PCtel needs to find out the common occurrences that lead to the problem. PCtel hopes to give a permanent solution soon.

If you cannot figure out who made your modem, CLICK HERE for information concerning the FCC ID lookup tool