TECHMODE Format
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GSM Channel
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A BBB CC -DD EEEEF G
HHHH I JJJ K LL MM
NNN OO PP QQQ RR SSSS
TTT TT UUU UU VVV VV
WWW WW XXX XX ZZZ ZZ

In standby mode shows only bold marked parameters.

These can be interpreted as:
A - current type of service
B - Broadcast control channel
S - Standalone dedicated control channel
T - Transfer channel
F - Frequency Hopping
BBB - number of current channel:
    001...124 - GSM900
    512...885 - DCS1800
    974...1023 - EGSM900
    9999 - no signal
CC - Number of current channel on a current BS (Base Station), it depends of operator settings
DD - receive level(RxLevel): -40dBm...-117dBm (-40 is strongest signal)
EEEE - Cell ID
F - Cell sector number
G - DTX
HHHH - may be another channel
I - Timeslot number: 0...7
    One of the eight channels which are used to transfer TDMA traffic.
    On 0 channel is transferred control information: BCCH, SDCCH, etc. Other channels are used for traffic.
JJJ - Transmitter signal level, 0...34 dBm
K - Bit Error Rate - number of errors, 0...7.
    0 - No errors. When more than 5, sound is being lost frequently.
    RxQual table
        0---BER < 0.2 (%)
        1---0.2 < BER < 0.4
        2---0,4 < BER < 0.8
        3---0.8 < BER < 1.6
        4---1.6 < BER < 3.2
        5---3.2 < BER < 6.4
        6---6.4 < BER < 12.8 (Half of packets are lost here)
        7---12.8 < BER
LL -Timing Advance. 0...63.
    With this parameter it is possible to calculate distance to BS using the following formula:
    L=1.11 x TA/2, where L is the distance to BS, TA - Timing Advance.
    In GSM standard max distance from BS is 35.2 km, so one number here is roughly 550 m.
    Timing Advance: 0; 1; 2; 3; 4; 5...63
    Distance to BS: <550 m; 550-1100 m; 1100-1650 m; 1650-2200 m; 2200-2750 m; 2750-3300 m ... 35.2 km.
MM - no info (seems like its the number of lost packets)
NNN - rate of speech codec:
    HR - half rate
    FR - full rate
    EFR - enhanced full rate
OO - no info, range 0...95 (seems like RxQual)
PP - no info, range 0...83
QQQ - Network Country Code (NCC)
RR - Operator Code (MNC)
SSSS - Location Area Code (LAC)
TTT TT, UUU UU, VVV VV, WWW WW, XXX XX, ZZZ ZZ - numbers & receive of the best alternative channels