I was installing Cisco IP Phones 7945 and 6945 using CUCME 9.0 in a 2921 router. The problem is that the 6945 phones don´t register in CUCME; i have tried with SCCP and SIP with the same results. The firmware that the phones are using is 9-2-1-0. The IOS of the router is 15-2-4 universal. The 7945 phones register with no problems; the problem is only with the 6945 phones.
... View more