CISCO IP PHONE SPA502G



  • OK guys, so this is a shot in the dark, as I haven't configured this phone myself, and it's infact in another country that I am trying to figure this out.

    • We have several small offices configured with this phone, a small 4 port switch, and 2 laptops.

    What we need to be able to do is remote power on these laptops using WOL, sometimes it works, sometimes it doesn't.

    • I can't confirm if it works for the same machines each time, as I haven't actually been there to test, so monitoring the results is difficult.

    With the above hardware setups for these offices, would it be better to connect the wall RJ45 to the switch, and everything to the switch? Or connect the phone to the walls' RJ45 and then the switch to the computer port on the phone, and then the laptops to the switch?

    I'm leaning towards, having everything connected to the switch (with a direct connection to the wall), but am getting some mixed information from my team on how these offices were configured, and I'm curious if there is a limit on the available DHCP pass through for these phones.



  • Everything connected to the switch gives you the best network visibility and control and really takes minimal extra effort if you have the ports.



  • That's what I've said, but I'm being told that the offices are setup the the RJ45 from the wall goes to the phone, then the phone is feeding the switch, which in turn feeds the laptops.

    To me this is over complicating the setup.



  • And now I get the answer as to why the offices were setup with the phone being the primary pass through, the small switches are POE and there aren't POE Injectors in each of the rooms either...

    So POE to the Phone, and then pass through... argh...



  • @DustinB3403 said:

    That's what I've said, but I'm being told that the offices are setup the the RJ45 from the wall goes to the phone, then the phone is feeding the switch, which in turn feeds the laptops.

    To me this is over complicating the setup.

    It is not a bad setup, tons of places do this. It reduces the cabling needs, but it is less than ideal. You have little two port switches all over the office and no direct visibility from your good switches to everything else.



  • Yeah, I know. I've seen it, and it totally makes sense as it saves money.

    To compound the issue, the employees in this office are moving the laptops and not properly reconnecting everything. Which is difficult to understand as there are laptop docks, so all that has to be done is redock the laptop....



  • @DustinB3403 said:

    That's what I've said, but I'm being told that the offices are setup the the RJ45 from the wall goes to the phone, then the phone is feeding the switch, which in turn feeds the laptops.

    To me this is over complicating the setup.

    I can't even follow this!

    are you saying
    switch -> wall -> phone -> laptop?



  • wall > phone > switch > laptops



  • what I was hoping was

    wall > switch > laptops & phone

    but because the phones are POE and we have no POE injectors in the offices everything is configured as

    wall > phone > switch > laptops



  • @DustinB3403 said:

    wall > phone > switch > laptops

    what is connected to the wall?



  • @DustinB3403 said:

    wall > phone > switch > laptops

    why is there a switch between the phone and the laptops? is it two laptops to one phone?



  • OK more basic.

    Classic IT closet with POE Switch > wall outlet to office > phone is connected to outlet > secondary ethernet on phone feeds the switch > the laptops are connected to switch.



  • Yep, 2 laptops to 1 phone.



  • OK that makes a bit more sense... I'm guessing they don't have two ports on the wall from the closet IT switch? Assuming that's the case, can they make this happen?



  • No that can't happen, the trouble is only a single Ethernet drop was run to each of the offices to save on the cost of building the office.

    But its now becoming more of a pain more than anything else.



  • Wait, each singular drop is PoE? That = screwed. It should go wall -> switch ->PoE inj to phone/laptop1/laptop2. The way your setup is done is just plain wrong.

    "Nobody will ever need multiple network ports! Nor will they ever need anything to go faster that 100M!"



  • I guess it boils down to how much they want WoL to work? It might be worth the $125 to run a new cable to solve the problem (and really they should run two cables, not just one, since there are three devices in that location). so maybe $200.



  • Without getting into the ordeal of why best practices were ignored, I am well aware of what should've been, and what is.

    I didn't have a say in the office setup, I'm just stuck fixing the issue..



  • @DustinB3403 Maybe next time you can get yourself invited during the design & build phases. 🙂



  • @dafyre Only in my prayers......



  • @DustinB3403 *holds out Catholic prayer beads, Jewish star, and does Indian Rain Dance.

    Some of us believe in the power of prayer. 😎



  • @DustinB3403 said:

    wall > phone > switch > laptops

    What. The. Crap?



  • @DustinB3403 said:

    I didn't have a say in the office setup, I'm just stuck fixing the issue..

    How do you fix it without having a say?



  • @scottalanmiller said:

    @DustinB3403 said:

    wall > phone > switch > laptops

    What. The. Crap?

    I know. I know.

    Single wall Ethernet with POE to feed power to the IP Phone. The IP phone has an output for the "computer" which is actually the switch, which then has the 2 laptops connected to it.

    It's totally bonkers.



  • @mlnews said:

    @DustinB3403 said:

    I didn't have a say in the office setup, I'm just stuck fixing the issue..

    How do you fix it without having a say?

    Don't ask stupid questions, I wave my wand at it of course.... ~~~~



  • @DustinB3403 said:

    Without getting into the ordeal of why best practices were ignored, I am well aware of what should've been, and what is.

    I didn't have a say in the office setup, I'm just stuck fixing the issue..

    I wasn't asking why best practices were ignored, i was offering a solution to the problem at hand. They want you to fix it.. THAT is the fix for it. Run one or two new cables - the problem is solved.

    There might not be a non cash outlay problem to get you to the solution you desire (of course they are already out the time they pay you to work on the problem).

    Are you salary for this company?



  • Celery, yes that stuff for rabbits and me it would seem.

    Thank you for the recommendation @Dashrender


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