I added a CP7916 Expansion module to a 7970 phone.
I have a 2811 router with ccme v. 4.3.1
I am unable to add 7916 in telephony-service.
load 7916 gives an error.
Even if don't have load, that doesn't matter as long you configure tftp-server for the modules that are requested at boot. To see which they are, "debug tftp-events" and "term mon"