Question about Mitel 5215 IP Phone

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DHCP DISCOVERY - USING OPTION 128 ERROR ON PHONE

When connection a Mitel 5215 phone to our network. it hangs on "DHCP DISCOVERY - USING OPTION 128"

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  • Anonymous Mar 25, 2014

    dhcp: discovery main ver 05.01.00.16

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  • 378 Answers

The network switch isn't set up properly.Contact your vendor or network admin for setting this up properly.

Posted on May 01, 2011

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Your phone needs an IP address in order to communicate. Normally, it asks a "host" for that IP. You need to be connected to the internet for it to connect to the normal host, and your router should be willing to give it that IP address. "DHCP" is how devices ask for and get an IP address.

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Though I can not confirm the phones voltage requirements, since all the phones I have worked with use 24vdc and passive POE (mode B in the Wiki link) here is the information Link

Feb 28, 2011 | Mitel 5215 IP Phone

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My IP mitel phone 5324 phone gives an error message option 128 missing


the DHCP server or your network switch isn't configured properly. I hope by now your network admin or vendor has gotten this problem resolved.

good luck,
Mark

Jan 27, 2011 | Mitel 5215 IP Phone

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When mitel 5234 is switched on it hangs at option 128 missing


I hope this has been resolved by now by your IT department or Phone vendor. Option 128 is a DHCP option and should be set up by them.

good luck,
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Jan 27, 2011 | Mitel 5215 IP Phone

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On the 5330 i have a Discovery option 128 missing message. There is not a dialtone on the phone, how do I make the phone operational?


I had this problem as well. This is a configuration that needs to be added to your DHCP server to enable the mitel system to obtain an iP address. If you reboot the phone and hold the down arrow it should bring you to a screen you can manually enter the IP address of the network you are useing.

Jan 26, 2011 | Mitel 5220 IP Phone

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Dhcp: Discovery Option 128 missing. Linksys router. My mac is happy, just not my Mitel 5330 phone. Whatup?


Option 128 tells the phone where the phone system is. A linksys router isn't capable of giving this option out. Where is the telephone system? Is this a teleworker phone? if TW phone, press and hold the 7 key while booting the phone, and type the teleworker server IP address.
I recommend you contact your administrator or system vendor for guidance.

Dec 24, 2010 | Mitel 5220 IP Phone

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What does "Option 128 Missing" on the Mitel 5330 IP mean? Thanks.


It means either that Option 128 is missing in your DHCP server or you are pulling the correct IP address (maybe incorrect VLAN). If you log in to the PBX and click the Help, just do a search on DHCP and it will explain this in further detail.

Aug 11, 2010 | Mitel 5220 IP Phone

1 Answer

I have plugged in my Mitel 5312 phone. I get his message: DHCP:Discovery Option 128 Missing How do I correct this?


My assumption is that your DHCP server isn't set up properly, or that someone has connected a Router to your network.
I suggest you contact your system administrator or vendor for further assistance.

Aug 01, 2010 | Mitel 5220 IP Phone

1 Answer

Dhcp server missing option 125 and 128, 5330 ip


My guess is that your DHCP server isn't set up properly, or someone has connected another Router to your network.

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