On 6-Sep-98, I tested 4 V.90 modems from 2 different lines (served by different GTE CO's- central offices), calling 4 types of V.90 servers.
The modems tested were:
3Com/USR v90 (model 1786-02 firmware 4.9.1)
Lucent LT WinModem (firmware 5.20)
Hayes/Accura 4924 Lucent PCMCIA (firmware 52198)
Zoom 2949 (firmware 2.081)
Servers called include:
3Com TCH (Total Control Hardware)
Livingston PM3 (still only beta v90 code for these servers)
Line 1 is my home line, served by GTE's remote GTD5 office; Line 2 is a business served by GTE's switching GTD5 office. Here are the results. You may have different results as the telco routing on 56k modem calls can affect performance:
Modem & Line
Connect RX/TX rate
V.90 success rate
|USR - Line 2||3Com TCH-Prodigy||49.3k/28.8k||100%|
|USR - Line 2||Ascend TNT-GTE.net||49.3k/24.0k||100%|
|USR - Line 2||Bay - Prodigy v90 beta||48.0k/21.6k||100%|
|USR - Line 2||Livingston -Hawaii.net****||49.3k/24.0k||100%|
|USR - Line 2||3Com TCH-ILH****||49.3k/28.8k||100%|
|Lucent LT - Line 2||3Com TCH - Prodigy||49.3k/28.8k||100%|
|Lucent LT - Line 2||Ascend TNT-GTE.net*||49.3k/24.0k*||100%|
|Lucent LT - Line 2||Bay - Prodigy v90 beta||48.0k/24.0k||100%|
|Lucent LT - Line 2||Livingston-Hawaii.net||49.4k/24.0k||100%|
|Hayes Accura 4924 Lucent Venus PCMCIA||ALL ISPs in DMS100****||---NoEC **||0%|
|Hayes Accura 4924||3Com TCH-ILH****||48.0/24.0k||100%|
|Zoom 2949 - Both lines||ALL||---Fake ***||0%|
|USR - Line 1||3Com TCH-Prodigy||48.0k/28.8k||16.7% (1-in-6)|
|USR - Line 1||Ascend TNT-GTE.net||46.6k/24.0k||16.7% (1-in-6)|
|USR - Line 1||Bay-Prodigy v90 beta||44.0k/21.6k||3% (1-in-36)|
|USR - Line 1||Livingston-Hawaii.net****||48.0k/24.0k||100%|
|USR - Line 1||3Com TCH - ILH ****||49.3k/28.8k||100%|
|Lucent LT - Line 1||3Com TCH-Prodigy||46.6K/24.0K||16.7%|
|Lucent LT - Line 1||Ascend TNT-GTE.net*||44.0k/24.0k||16.7%|
|Lucent LT - Line 1||Bay-Prodigy v90 beta||46.6k/21.6k||3%|
|Lucent LT - Line 1||Livingston-Hawaii.net****||45.3k/26.4k||100%|
|Lucent LT- Line 1||3Com TCH - ILH****||48.0k/26.4k||100%|
* - KFlex must be disabled (s38=0) to get a V.90 connection.
** - The Hayes/Lucent PCMCIA will "connect" at 48k+ rates, but with no error correction, so as to make the connection worthless; forcing error correction ( \N4) results in NO CARRIER. It will connect V.90 only to ILH - the ISP located in a GTD5 office, not the vast majority of ISPs served by DMS100 office. I haven't tested KFlex connects as the customer uses a v90/x2 provider.
*** - The Zoom sucks big time. It may pretend to be connected at times, but no data can pass; other times it doesn't even pretend - it just gives NO CARRIER. Once in a while, it might actually connect and pass data for some period of time, and some >0bps rate. It will do 34-38k KFlex connects to the Livingston & Ascend servers.
**** - ILH and Hawaii.net have access from a GTD5 CO; all the other ISPs are served from a DMS100 office.