Read from /dev/mux0:

+MBAN: Copyright 2000-2002 Motorola, Inc.

Read from /dev/mux1:

+MBAN: Copyright 2000-2002 Motorola, Inc.

Read from /dev/mux2:

+MBAN: Copyright 2000-2002 Motorola, Inc.

Read from /dev/mux3:

+MBAN: Copyright 2000-2002 Motorola, Inc.

Read from /dev/mux4:

+MBAN: Copyright 2000-2002 Motorola, Inc.

Write to /dev/mux4:
AT+CBC

Read from /dev/mux4:

+CPOM: 1

+CPOM: 1

+CLK: "06/12/16,14:56:09"
+EFLEX: 0,BC
+EFLEX: 1,00
+EFLEX: 2,00
+EFLEX: 3,00
+EFLEX: 4,02
+EF
Write to /dev/mux4:
AT+USBSTAT=255,1

Read from /dev/mux4:
LEX: 5,C0
+EFLEX: 6,00
+EFLEX: 99,FE
+EFLEX: 100,FF
+EFLEX: 101,FF
+EFLEX: 102,FF
+EFLEX: 103,FB
+EFLEX: 104,F7
+EFLEX
Write to /dev/mux4:
AT+CBSM?