Proxima V.92 SIA

Proxima V.92 SIA

PSTN V.92 Modem
The Bausch Proxima V.92 SIA is a V.92 PSTN modem in desktop housing with serial RS-232 port, specially designed to meet the stringent requirements for the Medical Services and Electricity Metering Industry as well as in Alarm Equipments such as continuous dial-in applications and alarm situations. The modem is in fact designed for all kind of remote or industrial sites with inconsistent environmental conditions. The modem is built around an embedded Bausch SM_H2 socket Modem with 3kV isolation, based on the Conexant (Harley 2) technology. The input voltage range of the Proxima V.92 SIA goes from 9 to 40 V AC-DC. The modem is fully regulated and comes with an external power supply. Thanks to the embedded SIA & Contact ID protocols the modem can be used as an alarm transmitter with serial RS-232 interface. For security reasons the modem supports selective Caller ID answering with disabled automatic answering (ATS0=0). The Proxima V.92 SIA modems are perfectly suited for remote industrial sites and whatever your application is, we can adapt the firmware to your needs. This is your everyday reliable and stable modem for general industrial use. The embedded software can be customised to your specific application.


  • Features:
    9-40 V AC-DC regulated wide range power supply
    SIA & Contact ID Alarm Transmitter
    Especially built for continuous dial-in communication
    Firmware adaptations possible on demand
    Security feature: Caller ID detect and answering
    Distinctive ring detect
    63 embedded and upgradeable country profiles
    Dial OUT to V.110 compatible GSM devices & Dial IN with GSM data
  • Typical applications:
    Dial In/out in an industrial environment
    Alarm equipments
    Remote reading of utility meters
    Medical applications
    Micro RTU applications
    Vending machine monitoring
    Remote control
    Security alarms
    Measurement instruments
    Surveillance systems
    Point of Sales


  • Housing:
    Dimensions: 139x195x32 (w x l x h)
    Weight: approx. 300 gr. (adapter excluded)
  • Power supply:
    Power adapter 9VAC/800mA and optional (on demand) two-core power cable to connect directly to 9-40 Vdc
  • Engine:
    External V.92 PSTN modem with standard RS-232 serial interface: Bausch V.92 SM_H2 socket modem inside (with 3kV isolation)
    The SM_H2 is based on Harley 2 Conexant technology.
    AT command sets: Embedded AT commands
    Specific firmware features: Alarm transmitter with embedded SIA & Contact ID protocol
    Flow control and speed buffering; Automatic format/speed sensing
    NVRAM for custom defaults
    Integrated DAA: extension pick-up detection, digital line protection, line-in-use detection
    Distinctive ring detect; Concurrent DTMF, ring and Caller ID detection Type I and type II
    Fax modem: V.17, V.29, Fax Class 1, 1.0 and 2 supporting Call progress, blacklisting

    Worldwide operation: 63 embedded and upgradeable country profiles
    Visualisation: LEDs: RxD, TxD, DCD, DTR, RI, CTS, RTS, MR, ON 
  • Protocols:
    ITU-T protocols: V.92 with PCM upstream rates up to 48 kbps, Quick Connect and Modem-on-hold functionality; V.92,
    V.90, V.34, V.32bis, V.32, V.22 bis, V.22 bis Fast Connect and V.29 FastPOS, V.22, V.23 Reversing,
    V.23 half duplex, V.80 asynchronous access Mode, V.21, Bell 212A and Bell 103
    Data Compression: V.44 data compression for optimal downloading; V.42 bis and MNP 5 data compression;
    V.42 LAPM and MNP 2-4 error correction; MNP 10EC(tm) enhanced cellular performance
  • Interfaces & Connectors:
    RS-232 Serial async interface, supports speeds up to 230.4 Kbps
    Serial port: DB25F (V.24, RS-232)
    connector PSTN Line: RJ-11 connector
  • Environmental:
    Temperature: operating -20°C to +55°C / storage: -20°C to +70°C
    Humidity: operating 10% to 75% / storage: 5% to 95%
  • System Requirements: Serial Interface, CD-ROM drive, DOS/Windows 95/985(SE)/ME/2000/NT4.0/7/XP/Mac/Linux/OS/2 : active modem
  • Approvals : Telecom Safety EMC
    ETSI ES 203021-1 V2.1.1 (2005-06) IEC60950-1 compliant design EN55024
    ETSI ES 203021-2 V2.1.1 (2005-06) Use of safety certified components EN55022 class B
    ETSI ES 203021-2 V2.1.1 (2005-06)
    Electrical safety: Class II

Additional Info

Bausch Datacom, a leading designer and manufacturer of dial-up and wireless modems for Commercial and Industrial Systems has developped a complete family of external and embedded PSTN modems specifically to meet the stringent requirements for the Medical Services, Electricity Metering Industry and Alarm Equipments.
One of these external modems is the Proxima V.92 SIA with embedded SIA & Contact ID protocol for alarm equipments (see application notes below).
Inside the Proxima V.92 SIA modem we have implemented the Bausch SM_H2 Socket Module. This socket modem is a V.92 (56K) PSTN modem based on Conexant Harley 2 Technology. The module is ideal for embedded medical, metering and alarm applications since it offers very low operating power requirements, a small board space, a worldwide compliance and a 3 kV dielectric withstanding voltage. Specifically for alarm applications it supports the SIA alarm protocol and contact ID.
Different versions :
SM_H2 Socket Modem Serial TTL : (64,5 x 26,5 mm)
SM_H2_3V3 V.92 Socket Modem, 3V3, SIA & Contact ID
SM_H2_3V3_V V.92 Socket Modem, 3V3, SIA & Contact ID with Voice listen-in (full duplex speakerphone, simultaneous voice and data)
SM_H2 embedded in DESKTOP RS-232 Serial Modem:
P56SIA Proxima V.92 SIA: Desktop modem, serial RS-232, SIA & Contact ID
SM_H2 embedded in DIN-RAIL RS-232/RS-485 Serial Modem:
DinBoxP485-SIA DinBox PSTN 485 SIA: DIN-rail modem, serial RS-232 and RS-485 (2/4-wire), watchdog, 10-40 Vdc, SIA & Contact ID
SM_H2 embedded in DIN 43861-2 (electricity market) RS-232/RS-485 Serial Modem:
InduBoxPSTN-SIA InduBox PSTN SIA: modem in sealable DIN 43861-2 housing, serial RS-232 and RS-485 (2-wire), watchdog, 85-265 VAC, SIA & Contact ID


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