Cinterion ( Formerly Siemens) XT55 Wireless Modem with built-in GPS

** Please do not use for new projects as this part is going obsolete**
** Please contact us to discuss alternatives**

General features:
• Overall dimensions:
o 35 x 53 x 5.1 mm
• Weight: approx. 10 g

GSM/GPRS specifications:
• Tri-Band 900/1800/1900
• GPRS multi-slot class 10
• GPRS mobile station class B
• Compliant to GSM phase 2/2+
• Output power:
o 2 W for EGSM900
o 1 W for GSM1800
o 1 W for GSM1900
• Control via AT commands
o (GSM 07.07 and 07.05)
• SIM application tool kit
o WAP compliant
• Low power consumption
• Supply voltage range 3.3…4.8 V
• Ambient temperature –20° C to +55° C
• Auto switch-off at +70°C

Specifications for SMS via GSM and GPRS:
• Point to point MO and MT
• SMS cell broadcast
• Text and PDU mode

Specifications for audio
• Tricodec:
o Half rate (HR)
o Full rate (FR)
o Enhanced full rate (EFR)
• Adaptive multi rate (AMR)
• Hands-free operation

Specification for fax:
• Group 3, class 2

Specifications for data transfer:
• GPRS class 10
• Max. 85.6 kbps (downlink)
• PBCCH support
• Coding schemes CS 1, 2, 3, 4
• CSD up to 14.4 kbps
• USSD
• V.110
• PPP-stack

Interfaces:
• 80-pin board-to-board
• Multiplexer
• Interface to external SIM
• Digital and analog audio interface
• AT commands via serial interface
• Serial interfaces:
o 2 x GSM, 2x GPS
• 2 separate antenna connectors for GSM/GPRS & GPS (Hirose)

Compatibility:
• AT cellular command interface

Specifications for GPS:
• Receiver 12 channel, L1 1575.42 MHz,
C/A code 1.023 MHz chip rate
• Accuracy Position 10 m CEP w/o SA/
Velocity 0.1 m/s, w/o SA/Time 1 µs
synchronized to GPS time
• DGPS accuracy 1 to 5 m, typical, 0.05 m/s, typical
• Date WGS-84
• Acquisition rate (TTFF defined at 95%
of first position localization)
o Snap start <3 s, average
o Hot start < 8 s, average
o Warm start < 38 s, average
o Cold start < 48 s, average
• Operating voltage 3.3 V DC ±5%
• Low power consumption
o ca. 200 mW at 3.3 V
• Protocols
o NMEA-0183
o RTCM SC-104
o SiRF binary
• Crystal oscillator (TCXO), temperature compensated with frequency stability of ±2.5 ppm
• Memory 1 MB flash