ShoreTel Phone Anomaly

Good Morning,
I have a ShoreTel phone plugged into a Cisco 2960x and we use port security. Before I configure port-security for the end user I normally see 3 MAC addresses on the port, 1 for the PC & 2 for the phone. (1 associated to data VLAN, the other to Voice VLAN)
In this case I  do not see the phones MAC address associated to the voice VLAN.  When i configure port-security the phone shows a message of "No Service", once I remove port-security it works fine.

Has anyone seen this behavior? I am thinking it may be  a bad phone.
Marty LopezNetwork AdministratorAsked:
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How many secure MAC addresses are you allowing per port using port security? If you're only allowing one per port, there's your issue. If you're allowing 3 per port, then you should be fine. However, I am also wondering why your phone has 2 MAC addresses.

Here is some Cisco documentation related to your switch:

You're going to need maximum value to be 3 for that port. Step 7 is going to be the portion of the article for you to pay attention to.

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Marty LopezNetwork AdministratorAuthor Commented:
Thanks for the help!
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