I have a Cisco Call Manager version 4.3, and set the Time Zone to GMT-04:00 Santiago and my phone display the GMT hours. For example I set the Time Zone to GMT-04:00 Caracas, La Paz, the phones show the correct hours, the problem is specific whit the time zone GMT-04:00 Santiago. There is a problem with this time zone, Santiago, in this version of the Call Manager?