Yes indeed it should work with any
Panasonic models than,actually i am not sure whether it is a specific issue on my connection or a general issue of unsupported landlines as earlier it was working on my existing landline devices.
Although customer care told that the number is displayed in +91 format so it should be supported by the device else number wont be displayed,can u please confirm if it is displayed as +91—— on ur cordless as I remember it displays it with +91