Layne Evans had an answer for this issue back in May, 2009.  I've cut and
pasted the majority of his solution below.  It's not pretty, but it does
work on the old legacy Polycom phones.

------

The problem is the fact that the polycoms need the whole config from the
sip.cfg and phone1.cfg sent for everything to be set up properly. The
easiest way to do this is to load a file that just contains the items you
would like to be different first then load the default files, this is the
method sipX is using. The problem is that now sipX (I am using
4.0) is setup to deal with these older phones the way Polycom has
recommended and the default files are not being loaded.

The temp solution that I came up with is as follows:
Get the default files, phone1.cfg and sip.cfg, from the Polycom SIP release
that you are using for the phones. Copy these to the tftproot dir, I would
assume that in most installs this would be
/var/sipxdata/configserver/phone/profile/tftproot
Then rename them to something that makes sense, in my case I am using ver.
2.1.3, so I named them polycom_phone1_213.cfg and polycom_sip_213.cfg.

Now do any configuration needed for the phone in sipXconfig and load the
profile to the phone, if your phone is already registered it will reboot and
still be incorrect until the next part. Now go back to the tftproot dir and
edit the < mac address>.cfg for the phone and edit the following lines to
look like this <APPLICATION_SPIP300 APP_FILE_PATH_SPIP300="sip_212.ld" 
CONFIG_FILES_SPIP300="0004f20178ef-sipx-sip.cfg,
0004f20178ef-sipx-phone.cfg, 0004f20178ef-sipx-device.cfg,
polycom_phone1_213.cfg, polycom_sip_213.cfg"/>

   <APPLICATION_SPIP500 APP_FILE_PATH_SPIP500="sip_212.ld" 
CONFIG_FILES_SPIP500="0004f20178ef-sipx-sip.cfg,
0004f20178ef-sipx-phone.cfg, 0004f20178ef-sipx-device.cfg,
polycom_phone1_213.cfg, polycom_sip_213.cfg"/>

Each of these are a single line in the config file and of course use
whatever name you used for the files. Reset your phone and everything should
be working. I am using bootrom 4.1.2 on these phones, I do not know if
earlier bootroms will work the same.

The reason this is a temporary fix is that if you modify the settings for
the phone in sipXconfig and load the profile it will write over the < mac
address >.cfg file and remove your edits. So you have to go back and edit
the file then reset the phone again. Of course a more permanent fix would be
to alter the program to add something similar when it created the file, but
I am not sure it is worth the time to support these older phones.

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Tony Graziano
Sent: Monday, June 14, 2010 5:44 PM
To: [email protected]; [email protected]
Subject: Re: [sipx-users] Polycom 500 phones register and work but dont ring

These are old and eol. You should default the phones to get rid of any
manual settings.

Your message isn't clear. You can make internal calls but they don't ring?
You don't need to register to call the AA. Check diagnostics to see if it is
really registered.

============================
Tony Graziano, Manager
Telephone: 434.984.8430
Fax: 434.984.8431

Email: [email protected]

LAN/Telephony/Security and Control Systems Helpdesk:
Telephone: 434.984.8426
Fax: 434.984.8427

Helpdesk Contract Customers:
http://www.myitdepartment.net/gethelp/

----- Original Message -----
From: [email protected]
<[email protected]>
To: [email protected] <[email protected]>
Sent: Mon Jun 14 19:45:17 2010
Subject: [sipx-users] Polycom 500 phones register and work but dont ring


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Hi Im having problems with a couple of polycom soundpoint
500 phones that work great apart of the fact that they dont
ring. Im able to make intenal calls from one to the other
with no problem. I checked the volume and everything seems
to be fine. Is there any weird checkbox I might be missing
guys?

Thanks of your help.
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