asterisk users - Mar 2006 - Cisco phones and Linksys SRW224P

I'm having problem powering Cisco phone's (7940 and 7905) on Linksys
SRW224P switch (with PoE functionality). I have tested three phone's, one is
working (7905) and two aren't (7905 and 7940). I have plugged all three
phones on same switch port with same cable!

Do I need to change anything in phone configuration? Is there something wrong
with Linksys switch? How can I troubleshoot this?

Please help, I'm going insane!


--
Tomislav Parcina
tparcina#lama.hr

In article <79337FA3BA80774F9FE87BF809C9F3562CAB5C@stipe.lama.hr>,
tparcina@lama.hr says...
> I'm having problem powering Cisco phone's (7940 and 7905) on
Linksys SRW224P switch (with PoE functionality). I have tested three
phone's, one is working (7905) and two aren't (7905 and 7940). I have
plugged all three phones on same switch port with same cable!
> 
> Do I need to change anything in phone configuration? Is there something
wrong with Linksys switch? How can I troubleshoot this?
> 
> Please help, I'm going insane!

One more thing. Cisco 7905 phone that is working is 74-3092-04 Rev.F0. Cisco
7905 phone that is not working is 74-3092-08 Rev.A0.

Anybody know about any hardware issue with this revisions?


--
Tomislav Parcina
tparcina#lama.hr

> 
> One more thing. Cisco 7905 phone that is working is 74-3092-04 Rev.F0.
> Cisco 7905 phone that is not working is 74-3092-08 Rev.A0.
> 
> Anybody know about any hardware issue with this revisions?
> 
Nothing for sure, and you may already know this, but some early Cisco
phones only knew how to speak Cisco PoE, not the 802 standard which was
defined a bit later. The Cisco web site should tell you which phone
talks which protocol though.

James

In article <AEC6C66638C05B468B556EA548C1A77DAF0CA0@trantor>,
james.harper@bendigoit.com.au says...
> Nothing for sure, and you may already know this, but some early Cisco
> phones only knew how to speak Cisco PoE, not the 802 standard which was
> defined a bit later. The Cisco web site should tell you which phone
> talks which protocol though.
Hi James!
It seams that you are right. I have another phone (7940 - I have bough it the
same time I bough 7905 that works) that works.
I have searched over Cisco site and I can't find list which hardware
revision supports PoE 802.3AF. Do you have link?

For now I know.
7905 - 74-3092-04 Rev.F0 => supports PoE 802.3AF
7905 - 74-3092-08 Rev.A0 => doesn't support PoE 802.3AF

7940 - 68-1735-11 Rev.A0 => supports PoE 802.3AF
7940 - 68-2564-03 B0	 => doesn't support PoE 802.3AF

7960 - 68-2563-03 B0	 => doesn't support PoE 802.3AF


--
Tomislav Parcina
tparcina#lama.hr

In article <44181457.9040506@i.cz>, pavel.jezek@i.cz
says...
> 7905/12, 7940/60 are NOT 802.3af compatible
> ONLY 7911, 7941/61/70 (and their gigabiteth variants),  are 802.3af 
> compliant
Totally not true!
I have 7905 phone that IS 802.3af compatible. Its on my table, right to my
laptop from which I'm sending this message.
I also have 7940 phone that is 802.3af compatible. And I also have several 7905
that don't work with 802.3af, and half dozen of 7940 that don't work
with 802,3af.

It's all like I wrote in previous mail. I belive it's because of
hardware revision. (read my previous mail).


--
Tomislav Parcina
tparcina#lama.hr

In article <441824E7.2030202@i.cz>, pavel.jezek@i.cz
says...
> Tomislav, please look at:
> http://powerdsine.com/Support/Certification/company_All.asp?company=Cisco
> also on ci$co site you can't find info, that old phones are 802.3af 
> compliant, but pre-standard...
> old ci$co phones can work with some poe equipment, but you can't be 
> sure, that will be working with all 802.3af power devices/midspans
> only fact, that your phone is working with your 802.3af equipment can't
> be guarantee for compatibility...
> PJ
Thank you for link.
The thing is that there are difference between different hardware revisions of
Cisco phone's. I need to find out What hardware revisions support what
standards.

Anther thing, is there any Cisco switch that supports even oldest Cisco VoIP
phones (7905 and 7940)?


--
Tomislav Parcina
tparcina#lama.hr

as I known, all ci$co switches supports pre-standard ci$co phones and 
mostly all todays switches also supports new 802.3af phones (and also 
pre-standard phones)....
PJ


Tomislav Par?ina wrote:
> Anther thing, is there any Cisco switch that supports even oldest Cisco
VoIP phones (7905 and 7940)?
>
>
> --
> Tomislav Parcina
> tparcina#lama.hr
>
>