Nokia 21XX - Manual (Page 4)

4
Table of contents
Phone Models and Software versions ..................................................................................... 2
Notes for 21xx / 31xx / 81xx phones...................................................................... 2
Notes for 51xx/61xx/62xx/71xx/88xx/91xx/32xx and other phones....................... 2
Menu Modes ............................................................................................................................ 3
Reserving SIM phonebook locations ....................................................................................... 3
Table of contents ..................................................................................................................... 4
Basics: Channel numbers in GSM........................................................................................... 4
Display 1 – Serving cell info..................................................................................................... 5
Display 10 – Paging Repetition Period, TMSI, Location Update Timer, AFC and AGC ......... 9
Display 20 – Charging state................................................................................................... 12
Display 39 – Information about reasons for call clearing....................................................... 16
Display 40 – Reset handover counters.................................................................................. 17
Display 60 – Reset counters to zero...................................................................................... 21
Display 65 – SMS attempts counters .................................................................................... 23
Display 70 – Temporary counters of DSP ............................................................................. 24
Display 80 – Reset and restart timers ................................................................................... 28
Display 100 (7110, 62XX) – Internal memory usage, overview ............................................ 31
Display 240 (no output) – Clear counters and start timers .................................................... 34
Basics: Channel numbers in GSM
GSM uses channel numbers between 0 and 1023. These frequency channels are allocated
by the different types of GSM as follows:
Type:
Subtype: Channels:
GSM400
GSM450 259 .. 293
GSM480 306 .. 340
GSM700 GSM750 438 .. 511
GSM850 GSM850 128 .. 251
GSM900 PGSM 1 .. 124
EGSM 0 .. 124
975 .. 1023
GSM-R 0 .. 124
955 .. 1023
GSM1800 GSM1800 512 .. 885
GSM1900 GSM1900 512 .. 810