• Dimensions: 74 x 65 x 33 mm (L x W x H)
• Weight: 130 g
• Supply voltage range: 8...30 V
• Power consumption:
  • Standby 2 mA
  • Idle mode 40 mA
  • Speech mode 300 mA (average)
  • GPRS (class 10) 500 mA (average)
  • Peak 4 A
• Temperature range:
  • Normal operation: -20°C ... +55°C
  • Restricted operation: -25°C to +70°C
  • Storage: -40°C to +70°C

• VGCS (Voice Group Call Service)
• VBS (Voice Broadcast Service)
• UUS1 (User-to-User Signalling type 1)
• eMLPP (Enhanced Multi-Level Precedence and Preemption)

• FN supported (Functional Number)
• PFN supported (Presentation Functional Number)
• REC (Railway Emergency Call)

• Quad-band GSM-R / EGSM 900 / GSM 1800 / GSM 1900
• GSM Phase 2 / Phase 2+
• GPRS multi-slot class 10
• Mobile station class B
• Output power:
  • Class 4 (2 W) for GSM-R / EGSM900
  • Class 1 (1 W) for GSM1800 / GSM 1900
• Control with AT commands via serial interface
• SIM Application Toolkit

• GPRS Class 10: max. 86 kbps (downlink)
• PBCCH support
• Coding scheme CS 1- 4
• CSD data transmission:
  • up to 14.4 kbps
  • USSD
  • Non transparent mode
  • V.110
• PPP stack for GPRS data transfer
• Fax: Group 3, Class 2
• TCP/IP stack access via AT command
• Protocols: TCP, UDP, HTTP, FTP, SMTP, POP3

• Triple-rate codec for HR, FR, EFR
• Adaptive multi rate (AMR)
• Hands-free operation
• Noise reduction and echo cancellation

• Point-to-point MO and MT
• SMS cell broadcast
• Text and PDU mode

• RS232 Interface (9-pin D-Sub)
• AT commands via serial interface
• Voltage supply (western with 6 pins modular plugs)
• Antenna connection (FME)
• Hand set connection (4-pin western modular plug)
• Indication LED
• Miniature SIM card holder

The TRM-3aT can be easily and ad hoc applied for GSM-R data and voice terminal or modem solutions within PC, notebook or other process computing environment.