Forgot to write
Type of terminal from both sides (500,dect,ip phone, music trunk) does not make any sense.
Sample of call
Ext 6222 - m3902, sucession 3.0, 9,8,7,4,3,2,1 - DSCs, 07 - TSC Xto remote 6.0 NRS.
Ext 9490 - acod music route on remote 6.0 (can be any internal number/terninal)
6222...