Cisco 2651XM router
IOS = c2600-adventerprisek9-mz.124-2.T.bin
I'm having great difficulty getting a cisco 7940G phone working - I've got 'Protocol Application Invalid' on the display. None of the phone buttons work except the factory reset procedure, which just produces the PAI message again.
I read on google that I have to have set option 150 on the DHCP. My 2651XM router is my DHCP server but it won't accept the command:
router(config)#dhcpd option 150
it comes back with
'% Invalid input detected'
Is this because I'm not using a voip IOS? or is there some other reason? I think I've found the ip address of the phone but I can't tftp it or anything. I'm stuck, thanks for any pointers.