hti or mxkey
ufs micro[hwk]
rj-45 cable 5xx
procedure:
1. make a test point or cut the copper line
2. connect ufs 3 as interface
3 open siemens service tool
4 click on egold tab
5 select model
6 service
7 click on service mode
8 backup EPP
9 Skey tab
10 ReCalc All keys
Done :) :) :)