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Mitel 5000 - Adding a POE switch - Netgear & Cisco switches

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Last Modified: 2015-11-18
We have a Mitel 5000 system and use VOip/POE.  We have two working Netgear gs748tp 48-port gigabit POE switches that all our phones plug into.  We are trying to add a Cisco SG500-52p POE switch to add more phones.  When we plug our phones into this Cisco switch it does power on but it says contacting DHCP server.  When I plug a laptop into the Cisco switch I get an ip address, I have Internet and I can ping across all our networks (192 and 172 networks).

On one of our Netgear switches, ports 1 & 2 are on VLAN 10 (192.168.170.0 network).  Port 1 connects to our Mitel phone system and Port 2 connects to our Sonicwall firewall.  The rest of the ports are on VLAN 1 (172.16.202.0 network).    

I haven't configured anything on my Cisco switch yet.  What do I need to do? Why can't my Mitel phone get an ip address?
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