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postjosh

join:2006-01-01
New York, NY
reply to postjosh

Re: westell 7500 doesn't auto-connect ppp

i finally resolved the issue. a very helpful verizon rep in the verizon direct forum figured it out. apparently, the 7500 has a battery backup which means that if you power cycle the modem too quickly, it won't reset. you need to power down for a full minute (or two) and then re-power the modem. it will then reconnect via ppp properly.

thanks for all your help,

josh


wayjac
Premium,MVM
join:2001-12-22
Indy
kudos:1
The version rep told you the 7500 has a battery backup?


batterup
I Can Not Tell A Lie.
Premium
join:2003-02-06
Netcong, NJ

1 recommendation

reply to postjosh
said by postjosh:

i finally resolved the issue. a very helpful verizon rep in the verizon direct forum figured it out. apparently, the 7500 has a battery backup ...

What page of the users manual is that listed on? I can't seem to find it.

Perhaps there is a capacitor that can keep it going for a few seconds.


postjosh

join:2006-01-01
New York, NY

1 recommendation

said by batterup:

What page of the users manual is that listed on? I can't seem to find it.

Perhaps there is a capacitor that can keep it going for a few seconds.

i suspect you are right. the rep used the term "internal battery" but capacitor makes more sense to me. my standard procedure is to turn the power off, count to five and turn it back on. that was causing my problem. i doubt you have to wait the full two minutes but five seconds definitely isn't enough. i've noticed that the whole modem is pretty slow to power up.

i'm curious how well it recovers from a loss of sync. i was away last week and after 3 days i was no longer able to log in because the modem had lost sync and the auto connect wasn't able to recover on it's own. that's what got me started on this whole inquiry.

this is my home network. at my studio, i also have dsl. there i'm running a westel modem sans router (i forget the model) and i attach it to a the ubiquitous linksys 54 router running tomato firmware. that system is rock solid. i almost never have to touch a thing.


Smith6612
Premium,MVM
join:2008-02-01
North Tonawanda, NY
kudos:24
Reviews:
·Verizon Online DSL
·Frontier Communi..
reply to postjosh
That's rather interesting to hear. Perhaps they could have been taking about the capacitors inside of a 7500 maintaining a little bit of charge to somehow store the PPP sessions? It would explain some small issues that are being seen but generally when RAM loses power, the contents of it are instantly corrupted.


wayjac
Premium,MVM
join:2001-12-22
Indy
kudos:1
reply to postjosh
Have you tried a different modem or using a router to make the pppoe connection

hubrisnxs

join:2009-12-30
Fountain Valley, CA
kudos:2
weird weird bug.



postjosh

join:2006-01-01
New York, NY
reply to wayjac
said by wayjac:

Have you tried a different modem or using a router to make the pppoe connection

yes, i have the problem on two different 7500's. it seems reasonable to expect the customer two wait 2 mins. before re-powering the modem. what concerns me is the reliability of the auto-connect to handle disruptions in the dsl service. my original modem dropped a connection while i was traveling in february and did not auto-reconnect.

the problem has not reoccurred and only time will tell how reliable my second modem is...

i do have another router that i could add to the setup and use for ppp. i would then put the westell into bridge mode. it's just that i don't want to have more electronic junk under the desk in our bedroom and it seems like a waste of electricity. i'm already running an airport express on this setup to get wireless "n" connectivity. if the express did qos, i would use it as the router but i digress...

thanks to all! - josh


wayjac
Premium,MVM
join:2001-12-22
Indy
kudos:1
said by postjosh:

what concerns me is the reliability of the auto-connect to handle disruptions in the dsl service. my original modem dropped a connection while i was traveling in february and did not auto-reconnect

I would have a look at the modems log
Disconnecting the telephone cable from the modem may be a better way to test the auto-connect


batterup
I Can Not Tell A Lie.
Premium
join:2003-02-06
Netcong, NJ
said by wayjac:


I would have a look at the modems log
Disconnecting the telephone cable from the modem may be a better way to test the auto-connect

After one does that make sure to turn the power off to reset the modem stats so the modem won't tell Verizon that there was a loss of signal especially if its done several times. The modem records and stores every loss of signal.

I can't say for sure if doing that was the cause but my sync speed was reduced after I did that several times and stayed low for a week. Verizon "optimizes" DSL circuits to reduce trouble calls.


wayjac
Premium,MVM
join:2001-12-22
Indy
kudos:1
said by batterup:

After one does that make sure to turn the power off to reset the modem stats so the modem won't tell Verizon that there was a loss of signal especially if its done several times. The modem records and stores every loss of signal

Verizon's dslam is the other modem it takes two for dsl to work and the dslam can gather all dsl info
said by batterup:

I can't say for sure if doing that was the cause but my sync speed was reduced after I did that several times and stayed low for a week. Verizon "optimizes" DSL circuits to reduce trouble calls

When the dsl line gets noisy the dslam and modem can adjust the sync speed automatically at every retrain


batterup
I Can Not Tell A Lie.
Premium
join:2003-02-06
Netcong, NJ
said by wayjac:

When the dsl line gets noisy the dslam and modem can adjust the sync speed automatically at every retrain

Does the DSLAM know the difference between a boot ether by turning off the power or with the modem software and a modem boot because of a loss of signal?

The modem does and and will record a loss if signal if one disconnects the telephone cord.


Smith6612
Premium,MVM
join:2008-02-01
North Tonawanda, NY
kudos:24
Reviews:
·Verizon Online DSL
·Frontier Communi..
The DSLAM will see a loss of signal as a loss of signal, regardless of what happens. The next time the DSLAM and modem attempt to sync, both pieces of equipment will negotiate the best rate for the line given the conditions of it. The only time the DSLAM might notice a loss of sync as being a result of line noise would be if the SNR dips too low and CRC errors begin racking up.

The modems do have CWMP access to them, so if it's a Verizon modem, Verizon might have a system in place that automatically gathers the modem's log when it syncs up. Who knows what they use the CWMP Agent for besides giving the support agents a tool to reach the modem.


batterup
I Can Not Tell A Lie.
Premium
join:2003-02-06
Netcong, NJ
OK so the DSLAM doesn't care if the modem records a loss of signal or not. That is what happens when I ass/u/me.


wayjac
Premium,MVM
join:2001-12-22
Indy
kudos:1
reply to batterup
said by batterup:

Does the DSLAM know the difference between a boot ether by turning off the power or with the modem software and a modem boot because of a loss of signal?

No....just a loss of dsl sync will not cause the modem to reboot
Many modems will erase the log during a reboot


batterup
I Can Not Tell A Lie.
Premium
join:2003-02-06
Netcong, NJ
said by wayjac:

No....just a loss of dsl sync will not cause the modem to reboot
Many modems will erase the log during a reboot

OK I misspoke, I meant cause the modem to reconnect. That was my concern that pulling the telephone plug causes the modem to record a loss of signal. That is why I suggested booting the modem to erase this record because I thought perhaps the DSLAM would read this as a line problem.


wayjac
Premium,MVM
join:2001-12-22
Indy
kudos:1
Ok....I just don't think any telco monitors the dslam the way you think they do


batterup
I Can Not Tell A Lie.
Premium
join:2003-02-06
Netcong, NJ
said by wayjac:

Ok....I just don't think any telco monitors the dslam the way you think they do

Let me say this about that. I just got 10 to 15 DSL from Verizon. The two nights I left the modem turned off I got a call from Verizon the next day asking if he modem was off.

I don't know if the 10 to 15 is in a beta test out of my CO but Verizon seems very interested in how my connection is doing.


wayjac
Premium,MVM
join:2001-12-22
Indy
kudos:1
That's hard to ignore............they are monitoring just like you said