I'm trying to use Linksys SPA 9x2 series phones with Cisco CME 4.1 for a client. Phones are registering, I can make/receive calls, SIP to SCCP phones and viceversa call work etc. One thing not working is presence on the Linksys phones. I tried using all the available presence types in latest firmware 6.1.5a.
Can someone from Cisco answer what is the presence format Cisco expects (I can't make BLF working) or share other info?