PRW.NET FAQ's : Dialup and Modems :
My HSP 56K Micromodem disconnects frequently. How can I improve my connection quality ?
These are some general suggestions to improve the connection quality on HSP 56K Micromodems:
1. Consider updtating the modem driver (software), particularly if you are using a PCTel HSP Micromodem or Audiomodem with drivers version 7.64 or lower or a PCTel AMR modems with version 2.3 or lower. These are some sites that have stable drivers for HSP modems:
| http://www.pctel.com/downloads/drivers_agreement.htm |
| http://www.pcchips.com/ |
| http://www.modem-help.freeserve.co.uk/mfc/compaq.html |
The current (Aug-2001) version for the HSP Micromodem drivers is 8.00 build 0005 . Note that not all HSP modems are the same. Before updating the driver you need to determine the model of your modem using either the FCC ID printed on the card or the results of ATI3 (Control Panel, Modem, Diagnostics, More Info). If ATI3 contains "-PCC-" you probably need AudioModem drivers. Most HSP modems built into a motherboard use the Audiomodem drivers. Using an incorrect driver could make the modem stop working. Consult with your hardware vendor if you have questions about the driver corresponding to the type of modem installed on your system.
2. In some cases you can improve connection reliability on HSP modems by using a custom init string on Control Panel, Modems, Properties, Connection, Advanced, Extra Settings. These are ones that appear to help with many HSP modems:
AT&Fn0s37=14
AT&Fn0s37=14s34=8
There are other init string suggestions in the articles included
above. Some HSP modems also work better when you set the maximum
speed to 38400 bps. Some work better turning off data compression
and turning on hardware flow control. Note that these init string
optimizations or setting changes are not required with modems that
with a robust V.90 implementation. Generally they should not be
required with the 8.00 drivers.3. You can get some suggestions indicating your symptoms and modem type at:
| http://modemsite.com/56k/tshoot.htm |
There are PRW customers using HSP modems succesfully. We find that the ones that achieve the best results are those with updated drivers and optimized init strings.
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