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Check TFTP settings. &nbsp;If the configuration file from the TFTP server listed more than one Call Manager, the phone will try each address until it can register with one. During this step, the phone will display &quot;Configuring CM list,&quot; then &quot;Opening a.b.c.d&quot; which is the address of the Call Manager.&quot;
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Check TFTP settings.  If the configuration file from the TFTP server listed more than one Call Manager, the phone will try each address until it can register with one. During this step, the phone will display "Configuring CM list," then "Opening a.b.c.d" which is the address of the Call Manager."

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This is a brand new UC520W, I tried plugging in a 7960 and 7940 with the same result, looks like just 1 TFTP server listed.<br />
Will check the link, thank you
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This is a brand new UC520W, I tried plugging in a 7960 and 7940 with the same result, looks like just 1 TFTP server listed.
Will check the link, thank you

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Turns out it was a DHCP issue, Thank You jdera
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Turns out it was a DHCP issue, Thank You jdera

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When plugging a Cisco 7940 or 7960 into the new UC500 it sits at Configuring CM List
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When plugging a Cisco 7940 or 7960 into the new UC500 it sits at Configuring CM List

Voice over IP (VoIP) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. Other terms commonly associated with VoIP are IP telephony, Internet telephony, broadband telephony, and broadband phone service. The term specifically refers to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the public Internet, rather than via the public switched telephone network (PSTN).  Examples of the VoIP protocols are H.323, Media Gateway Control Protocol (MGCP), Session Initiation Protocol (SIP), H.248 (also known as Media Gateway Control (Megaco)), Real-time Transport Protocol (RTP), Real-time Transport Control Protocol (RTCP), Secure Real-time Transport Protocol (SRTP), Session Description Protocol (SDP), and Inter-Asterisk eXchange (IAX).