Siemens SINUMERIK 828D Series Software And Hardware Service Manual page 236

Service cases - hardware
4.20 MODEM MD720
When resetting, the consequences are as follows:
● An established connection is interrupted.
● The MODEM MD720 is restarted.
● The SIM card PIN is cleared. It is no longer possible to read out the logbook.
Figure 4-71
236
MODEM MD720: SET key
Software and hardware
Service Manual, 08/2018, 6FC5397-5DP40-6BA1