Question about Mitel 5312 IP Phone

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Mitel 5312 has empty display at times and sometimes the date is not displayed fully. What can be the cause of this? There are 5 phones connected to my HP 1700 switch and occasionally a few of them have these problems

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  • 112 Answers

Power issue or bad phones..

Posted on Oct 25, 2013

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: we have a mitel 3300 connected to cisco CM thru siptrunk

can somebody help me we have a Sip connection between a mitel 3300 and Cisco callmanager only the conference call doesn't work who can help me out

Posted on Jul 10, 2009

  • 378 Answers

SOURCE: I have plugged in my

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.

Posted on Apr 22, 2011

  • 378 Answers

SOURCE: Mitel Phones throughout the property are trying to

The unfortunate thing here is there is a network disruption caused by the network not set up properly to support VoIP or a problem on the network.
The file it's trying to pull from the phone system is very small, and it uses TFTP. If there's a disruption in the download, it will cause the set to reboot.

You need to contact your system admin or your telephone system vendor and your network admin/vendor to have it resolved.

Posted on Jun 03, 2011

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1 Answer

How do I manually set the IP address on a mitel 5312 handset?


This process may vary depending on what system you are using and what version but here is how you get into the phone:
1)Hold down the 2 volume keys at the same time and plug the network cable back in all the while holding down the 2 volume keys.

1)When you see "NETWORK PARAMETERS?" release the volume keys.
    2)Press the <*> key for YES
    3)When you see "VIEW CURRENT VALUES?" press the <#> key for No
    4)When you see "VIEW DHCP VALUES?" press the <#> key for No
    5)When you see "VIEW STATIC VALUES? press the <#> key for No
    6)When you see "VIEW PERSIST. DATA? Press the <#> key for No
    7)When you see "MODIFY STATIC VALUE?" press the <*> key for Yes

    Again this is for a more up to date version of Mitel firmware. If you see something different let me know.

    Good Luck

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Feb 13, 2015 | Mitel Computers & Internet

1 Answer

All the buttons are lit on



Do you have another 5312 on your network? If so swap it out and see if it is the phone or configuration

Apr 23, 2014 | Mitel 5312 IP Phone

1 Answer

Poor sound quality


IP phones compress analog data to avoid excess bandwidth. When calls are placed long distances this becomes really noticeable.

Sep 27, 2013 | Mitel 5312 IP Phone

1 Answer

Mitel phone only operating in 1 direction


Does the phone have a router/firewall/Layer3 data switch between the phone and the controller? If yes I suspect you have blocked UDP IP ports. Here is a wiki on TCP and UDP ports. http://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbersThe ports you need open to the controller are specific to your system model. The 5312 phone works on different controllers. Please list the controller type you have. Good Luck.

Mar 27, 2013 | Mitel 5312 IP Phone

1 Answer

One way conversation on mitel phone on LAN network


What model of Mitel controller do you have? The 5312 works on several different controllers. Sounds like you have UDP ports blocked on you IP network. Please list your controller type and if you have a firewall/router/or layer 3 switching on your data switch.

Mar 27, 2013 | Mitel 5312 IP Phone

1 Answer

What is the password on the mital 5312 IP Phone?


Need to login to phone system. And reset password

Oct 10, 2012 | Mitel 5312 IP Phone

1 Answer

HELP! Deleted the mailbox


I don't have a passcode to access my message. Help me please

Jan 30, 2012 | Mitel 5312 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

2 Answers

Mitel 5550 Console cannot obtain ip address.


Follow the proper boot-up sequence in the manual, and verify the PC boots up on the native lan first.

Oct 06, 2009 | Mitel Computers & Internet

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