STEPPII-55/56-LT H
ARDWARE
DESCRIPTION
V
ERSION
1.01
External antenna:
C
onnected via 50 Ohm antenna connector.
Audio features:
Speech codec modes:
H
alf Rate (ETS 06.20)
F
ull Rate (ETS 06.10)
E
nhanced Full Rate (ETS 06.50/06.60/06.80)
A
daptive Multi Rate (AMR)
Handsfree operation
E
cho cancellation
N
oise reduction
Phonebook management:
Supported phonebook types: SM, FD, LD, MC, RC, ON,
ME
Ringing tones:
O
ffers a choice of 7 different ringing tones/melodies,
easily selectable with AT command
Real time clock:
I
mplemented
Timer function:
P
rogrammable via SMS or $PSRF commands
Coding scheme
1 Timeslot
2 Timeslots
4 Timeslots
CS-1:
9.05 kbps
18.1 kbps
36.2 kbps
CS-2:
13.4 kbps
26.8 kbps
53.6 kbps
CS-3:
15.6 kbps
31.2 kbps
62.4 kbps
CS-4:
21.4 kbps
42.8 kbps
85.6 kbps
Table 5:
Coding schemes and maximum net data rates over air interface
Please note that the values listed above are the maximum ratings which, in practice,
are influenced by a great variety of factors, primarily, for example, traffic variations
and network coverage.
*
Please note that not all features given above (in this chapter) are utilized in our
firmware.
4.3.1 Air interface of the STEPPII-55/56-LT GSM/GPRS part
Test conditions:
All measurements have been performed at T
amb
= 25 °C, V
IN+
nom = 12 V.
Parameter
Min
Typ
Max
Unit
Frequency range
Uplink (MS → BTS)
Frequency range
Downlink (BTS → MS)
GSM 850
824
849
MHz
GSM 1800
1710
1785
MHz
GSM 1900
1850
1910
MHz
GSM 850
869
894
MHz
GSM 1800
1805
1880
MHz
GSM 1900
1930
1990
MHz
This confidential document is a property of FALCOM and may not be copied or circulated without previous permission
.
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