Possible to remote restart Polycom phones?

From the asterisk CLI:

sip notify polycom-check-config

replace with the extension you wish to reboot.

You also might want to modify this value in sip.cfg:

voIpProt.SIP.specialEvent.checkSync.alwaysReboot="x"

0 will only reboot if files on the FTP/TFTP server have changed
1 will reboot the phone always

To /etc/asterisk/sip_notify.conf:

I added:

[polycom-check-cfg]
Event=>check-sync
Content-Length=>0

but I renamed it [polyboot]

So, Lazy me types "sip notify polyboot 4930" (4930 is the extension)
That works nicely too.

And I stumbled across this gem and implemented it, Nice and easy!:
Rebooting Polycom Phones from within a dialplan

You can use this from within a dailplan as well. Make sure to pick a password that is very secure. Seems silly to have to call asterisk from itself inorder to do this but it works. I have 200 polycom phones with extensions from 3000 to 3199. This loops through and tells them all to reboot. On an opteron system this takes about 30 seconds to send all the messages out. This is very useful if you have a bunch of phones and are rolling out new features. I either do this late at night or page everyone and let them know an hour before hand.

; Extension RESETPHONES (73738746637) - resets all polycom phones from 3000 - 3199
exten => 73738746637,1,Answer()
exten => 73738746637,2,Authenticate(65) ;get the password
exten => 73738746637,3,Playback(queue-holdtime) ;let them know it will take a while
exten => 73738746637,4,Playback(digits/30)
exten => 73738746637,5,Playback(queue-seconds)
exten => 73738746637,6,Set(COUNT=0) ;start counting
exten => 73738746637,7,GotoIf($["${COUNT}" = "${CALLERID(num):1}"]?9) ;dont reboot the caller... yet
exten => 73738746637,8,System(/usr/sbin/asterisk -rx "sip notify polycom-check-cfg 3${COUNT}") ;reboot a phone
exten => 73738746637,9,Set(COUNT=${MATH(${COUNT}+1,i)}) ;increment the count
exten => 73738746637,10,GotoIf($["${COUNT}" != "200"]?7) ;check if we have rebooted the 200 phones
exten => 73738746637,11,Playback(tt-weasels) ;let them know something happened
exten => 73738746637,12,Playback(queue-thankyou)
exten => 73738746637,13,System(/usr/sbin/asterisk -rx "sip notify polycom-check-cfg ${CALLERID(num)}") ;reboot the caller
exten => 73738746637,14,Hangup()

What version of Endpoint manager is the update , I have 2.6.3-1 and I don't see any button to reboot the polycom phone.
Also, I tried the following command but with no success :
sip notify polyboot 580
asterisk -rx "sip notify polyboot 580"
Any idea on the correct command to reboot polycom phone (331 and 501 Models)

i would like to reboot the phone from CLI. so far if I want to reboot the phone I type the IP address of the phone in the browser and change something to have it reboot.
Thanks