Siemens S1, S3, S3+, S3 Com and S4 Monitor mode


This page was changed 31/01/01

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[How] to enter Monitor mode:

Go to "Phone options" or "SET UP", "Phone status"

[Now] go to "Network options" or "GSM SERVICE" and you'll find "Monitor" at the bottom of the list.

Click on the parameters on the images below
to obtain further information
(This imagemap only works with Netscape 2.0 or later.)




If you press right menu in Monitor mode you will see the six strongest surrounding base transceivers.
Explanation to the headers: CH RL RM TX NB

Please note that some of the parameters (TS, TA, PL, QF, QS, LF, LS) will only show up when accessing Monitor mode during a call.

[CH] Channel number.

[RX] Reception in dBm.

[N] National Colour Code, a way to distinguish two cells using the same channel. A GSM Network operator is assigned a NCC to be used in border areas to distinguish different countries networks. The operator can use any NCC in other parts of the country.

[B] Broadcast Colour Code, a way to distinguish two cells using the same channel. Also used for the "training sequence" which is vital for proper coding and decoding of the call.

[CI] Shows Cell identity in Hex

[C1+] Value remaining until the phone has to make a forced handover. Calculated as C1=(RX)-(RXAM).

[LAI] Location Area Identity. Shows network code. 42F010 means 240 01, the other code shows which MSC area you're currently in (in Hex).

[TXPWR] Shows allowed Transmit Power in dBm.

[RXAM] Acceptable value for reception in dBm.

[TS] Timeslot number.

[TA] Timing Advance. Shows distance to base station in increments of approx 500 meters.

[PL] Power Level. Transmission power from Mobile to Base see table of conversions.

[LF] The C1 value using full transmission from base.

[LS] The C1 value using discontinous transmission from base.

[QF] Quality of link during full transmission from base. Expressed in % Bit Error Rate.

[QS] Quality of link during discontinuous transmission from base. Expressed in % Bit Error Rate. See table.

Bit Error Rate
0 1 2 3 4 5 6 7
0.2% 0.4% 0.8% 1.6% 3.2% 6.4% 12.8% 25.6%

dBm - PL - Watt Conversion Table
dBm 39 37 35 33 31 29 27 25 23 21 19 17 15 13
PL 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Watt 8.00 5.00 3.20 2.00 1.30 0.80 0.50 0.32 0.20 0.13 0.08 0.05 0.03 0.02


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