Can the customer design the application in such a way that they can change from the internal SIM card to the external and back to the internal without turning off the GM862 modem?
The GM862 doesn’t permit that internal SIM and external SIM are simultaneously inserted.A
solution could be this one: You must use two external SIM card Holder
and add two three states buffers to separate the not active SIM from the
bus of active SIM. On the GM862 there is a CCIN line for managing the
inserting and removing of the external SIM card Holder. The CCIN pin must be managed from an external logic control in such a way that:
Note: There is no limit about number of SIMs, obviously you have to use thesame number of SIM and three state buffers.
Hit enter to search or ESC to close
Knowledge Base & Download Zone