crwdns2934241:0crwdne2934241:0 Dale

crwdns2934249:0crwdne2934249:0:

you can type

*#*#3424#*#*

as though to make a phone call and it brings up a menu for a number of tests you can make on your phone systems, including a sound check. You should be able to figure out the steps needed to accomplish the sound check to find out how each channel is preforming.

Good luck

crwdns2915684:0crwdne2915684:0:

open