Question about Polycom CX300

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During a call, party on other end cannot hear me for a brief time.

I work for a major corporation and several of us in our office use the Polycom CX300 through Microsoft Lync 2010. We all also telecommute from home as well (via VPN), and the same issue happens at home as well as in the office. After a few minutes on the phone with someone they will not be able to hear us for about 5 seconds. Lately it has been every single call. We had someone who installed the phones come check and he has no idea. Can anyone make a suggestion on what we can do or what needs to be done?

Posted by Randy Aven on


5 Related Answers


Asfiya Ahamed

  • 1011 Answers

SOURCE: Polcom phones stop ringing

Dear Sir/Madam,

1) After rebooting you can watch your ftp server and see the phone logging in and logging out. Its doing several things (checking the size of the bootrom.ld and sip.ld files and seeing if an update is necessary, etc etc) that I will go over later. It will reboot a couple of times to finish off the update.

2) After the reboots, lets be absolutely sure and lets check the bootrom and SIP versions.

  • Press the Menu button, 2 Status, 1 Platform, 1 Phone. Arrow down to view the BootRom version here.
  • Press the Menu button, 2 Status, 1 Platform, 2 Application, 1 Main. You will be able to view the "Version" number here.

If you did everything right, you should see the latest versions of the bootrom and SIP app that you had placed on your ftp site.

Now check your FTP site. You will notice that there are files being uploaded to your directory with *.log extensions. You guess it, these are just logs that the Phone dumps so you can trouble shoot when need be. If everything was done right, your phone will of seen the new bootrom.ld file and downloaded it, rebooted, and installed it. Next it will download your new sip.ld file and use it.

For More Information and Software updates. See this link.......

Good Luck

"Don't forget to rate the Solution"

Posted on Jun 28, 2008



  • 1 Answer

SOURCE: just installing polycom 501 phones with nextiva

Ohh this mean, you did not register this extension on your phone system. Create this extension on your phone system. Be sure that password given on Phonesystem is also configured on phone too.

Posted on Nov 14, 2008



  • 284 Answers

SOURCE: How do I set up my voice mail on my Polycom IP 330 Phone?

Voice mail is probably a feature provided by your service provider.
I have a PBX with several different viop phones configured.

The voice mail is stored on the PBX you just need to configure the message waiting light on the phone and possibly a speed button that automatically dials the voice mail code.

I assume that you don't have a PBX and an internet service provider / voice service provider has those features available for you. They should have the documentation you need to configure the phone. If they specifically support your model phone you are in luck. Otherwise you will have to adapt from their generic description.

I have noticed that some really cheap voice plans don't include voice mail.

Hope this helps.

Posted on Jul 08, 2009


SOURCE: Making a Polycom SoundPoint 501 work on an Avaya IPO

As you have probably found, SIP phones are not supported until R5, which just came out.

Posted on Sep 27, 2009


SOURCE: one of our Polycom 550 phones keeps randomly

It is not your T1. The T1 only controls the internet, not your local LAN. How old is the phone? It could be a bad phone....What system is it installed on?

Posted on Jan 10, 2010

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