[oaktree]

* When dialing into my internet provider, my connection (v.92) will last only about five minutes or less. The connection is at 50.6 or 53.3 kbs. First the Received indicator in the Network window stops flickering and several seconds later the Sent indicator stops followed immediately by the dropping of the dial-up line.
* I don't have "Disconnect if idle" selected in the Advanced settings in the Network window.
* The dropping of the dial-up connection happens quicker when downloading software updates via the Apple pull-down menu.
* This doesn't happen when I'm using Panther.
* I have tried erasing my hard disk and loading nothing but Leopard itself. Problem persists.
* I tried adding the updates through 10.5.5. Problem persists.
* I have checked my wiring out to the telephone company line by plugging my Mac directly into that line. Problem persists.
* I tried having the modem replaced. Problem persists.
* I tried the v.90 modem setting. Problem persists.
* If I connect with the modem set to v.34, the dial-up service is very slow but does not drop.
* My G3 iMac and 3 Intel PCs running Windows do not have this problem while connected to my internet provider.

[dougster]

oaktree said:

* I don't have "Disconnect if idle" selected in the Advanced settings in the Network window.

-Hi,

Its been a long time since trouble shooting dialup. But just for fun try enabling "Disconnect if Idle" and see if that clears up the hiccup. You can always go back and re-select it. You aren't getting a lot of feedback due to the lack of dialup out there. ::sorry:: :(

[oaktree]

Thanks, dougster, but your idea didn't work. Considering my list of various tests and checks already attempted, a different direction like what you suggest is appreciated.

[DMurray431]

You might want to check your phone line service. It has been a while since I had dial-up, but mine used to shut down frequently due to a "noisy line"

[Killerbyte]

What kind of modem do you have?

[oaktree]

That doesn't appear a problem, DMurray431. I should have been dropping the connection on the other Mac, on the three Intel PCs, and while running with Panther but those all work just fine. I only have the problem while running with Leopard on this iMac.

[oaktree]

Killerbyte, this iMac has the Apple internal modem with which this model is normally configured.

[Killerbyte]

There is a way to "adjust" all modems so that they open the line and listen first before attempting to make a connection.
This information is stored in a profile which (normally) can be saved to the modem device either temporarily or permaently.

It should be possible to gain acces to this profile and see what it brings up. There should be some more info on this on Internet.
It may also be available inSystem Preferences (but I don't own an iMac so can't check that. sorry).

For example:
AT&C1&D2&W would tell the modem to adjust itself to the line conditions and save this information temporarily for the session.

It will not guarantee the highest speed but it will give you a stable connection based on the quality of the local line.

Some known problem areas:
- Running a Modem to use an analog line that runs through your DSL connection.
- Poor quality "virtual" modems at the Internet Provider end.