After a series of power outages, our Cisco 2821 router wont boot.  There are no LED's lit on the front panel.  (The LEDs in the back near the Interfaces do light up.)  When I connected a console cable and power cycled the router the message "RECEIVE ...

We have a hosted SIP based IP PBX at one of our sites.   It is not working out.  We have invested in a number of Polycom IP501 and IP601 SIP Handsets.  My question is can these phones be used with a Cisco Telephony Solution so we can retain our inves...