Polycom Phantom Ringing

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I have a Polycom Soundpoint IP335.

There are no inbound routes set to the phones yet.

However, the phones are getting phantom rings.

What is the legitimacy of these calls?

Is there something I need to block to stop it?

I believe its people trying to hack the phones/phone system but I cannot find where I read that before.

Thanks,

7 thoughts on - Polycom Phantom Ringing

  • If your phones are being “hacked” you have a firewall problem. Your phones
    should only be registering to your local DHCP server and your Asterisk box.

    DHCP Server 192.X.X.X

    Asterisk Server 192.X.Y.Y

    Phone 192.X.Z.Z

    [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of eherr
    Sent: Friday, November 18, 2011 8:34 AM

    I have a Polycom Soundpoint IP335.

    There are no inbound routes set to the phones yet.

    However, the phones are getting phantom rings.

    What is the legitimacy of these calls?

    Is there something I need to block to stop it?

    I believe its people trying to hack the phones/phone system but I cannot
    find where I read that before.

    Thanks,

  • Nick.

    I don’t think that’s it. I have had the Polycom on my test site
    ring unexpectadly. It could be a bug in asterisk. Are you using
    1.8?

    Nick

  • Well this is a remote site.

    I am running 1.4.26

    I have multiple polycoms that do not experience this.

    They are getting dhcp from their local router.

    I am wondering if it could either be a bug in the polycom firmware or something like a probe into the phone.

    I am pretty sure I read that phantom rings are sip calls to a phone where they are probing for extensions or something; cant
    remember.

  • I have Polycom 501’s and they keep a log of all calls. I would expect the
    335’s to have that capability as well.

  • Sorry, in my last email I mentioned a bug in *, but I meant a bug in
    Poly’s firmware…..
    The phone we have in our test lab is an IP301

    Nick