4 Wire Leased Line Modem
V.34 Analog Modem - Image 2
V.34 Analog Modem - Image 3
V.34 Analog Modem - Image 4

V.34 Analog Modem

The T-336 is a series of high performance, synchronous and asynchronous, full-duplex, multi-standard standalone or rack- mounted modem. It is designed for use on 2-wire dial-up and 2/ 4-wire leased-line circuits.
The T-336 is fully compliant with ITU-T V.34 recommendation as well as being compatible with ITU-T recommended V.32 bis/ V.32, V.22 bis, V.23 and V.21 international standards while operating at 33600, 31200, 28800, 26400, 24000, 21600, 19200, 16800, 14400, 12000, 9600, 7200, 4800, 2400, 1200, and 300 bits per second.
In V.34 mode the T-336 provides full-duplex operation at up to 33.6Kbps on a 2/ 4-wire PSTN line with features like line probing, symbol rate and carrier frequency automatic selection. A range of performance enhancing techniques are available for V.34 mode, including adaptive precoding, adaptive pre-emphasis, non-linear encoding (Warping), constellation expansion, multi-dimensional trellis coding, transmission power back-off (power drop), V.8 standard modem initialization and shell mapping. An in-band secondary channel allows the user to monitor and control the remote site unit. The T-336 series also offers auto callback and leased-line security checks in addition to the dial-up security checks.
The TRS16 rack can accommodate up to 16 modem cards with 16 ports, control unit and single or dual redundant power unit. Dual redundant power supply meaning if one power does fail, the other one is capable of powering the entire rack.
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  • Feature

    • Fully compatible with ITU-T V.34+/ V.34/ V.32bis/ V.32/ V. 22bis/ V.22/ V.23/ V.21/ V.24/ V.28/ V.25bis/ V.54/ V.52/ V. 42/ V.42bis/ V.14/ V.13/ V.8 and Bell 212A/103
    • 19” rack accommodates up to 16 modem cards with hot-swap and profile copy functions
    • Achieve throughput up to 115200bps
    • V.13 simulated carrier in half duplex
    • MNP4, V.42 error correction
    • MNP5, V.42bis data compression
    • Extended AT and ITU-T V.25bis command set
    • Leased line dial back-up and restore in manual or auto mode
    • Auto fallback and fall forward
    • Remote configuration via secondary channel
    • Front panel lock and password protect
    • Password & call back security
    • Diagnostic capabilities:

      • Analog loopback, digital loopback and remote, digital loopback (with pattern or not); BERT test pattern using 511

    • Auto or manual dialing/answer
    • Front panel configuration via rubber switches and LCD
    • Front panel key reset function

  • Specifications

    Compatibility
    • V.34+: 33.6/31.2 Kbps SM (4D TCM)
    • V.34: 28.8/26.4/24/21.6/19.2/16.8/14.4/12/9.6/7.2/4.8/2.4 Kbps SM(4D TCM)
    • V.32bis: 14400/12000/7200 bps TCM
    • V.32: 9600 bps TCM, 9600/4800 bps QAM
    • V.26bis: 2400/1200 bps DPSK
    • V.22bis: 2400 bps QAM, 1200 bps BPSK
    • V.22/Bell 212A: 1200 bps DPSK
    • V.23: 1200/75, 600/75 bps FSK
    • V.21/Bell 103: 300 bps FSK
    Data Format
    • Synchronous or Asynchronous
    • Total bit length: 8, 9, 10, 11
    Data Speed
    • Asynchronous –

      • 75/ 300/ 600/ 1200/ 2400/ 4800/ 7200/ 9600/ 12000/ 14400/ 16800/ 19200/ 21600/ 24000/ 26400/ 28800/ 31200/ 33600/ 38400/ 57600/ 76800/ 115200 bps

    • Synchronous –

      • 1200/ 2400/ 4800/ 7200/ 9600/ 12000/ 14400/ 16800/ 19200/ 21600/ 24000/ 26400/ 28800/ 31200/ 33600 bps

    DTE Interface
    • EIA RS-232C, ITU-T V.24/ V.28
    Line Requirement
    • Dial-up line, 2/ 4-wire leased line
    • Transmit Level
    • Dial-up line: 0 to -15 dBm; Leased line: 0 to -31 dBm
    Receive Dynamic Range
    • -4 to -43/ 0 to -33 dBm
    Equalization
    • Automatic adaptive EQ
    Call Progress Monitoring
    • Dial tone, Ring, Ring back, Busy and backup dial
    Line Status Monitoring

    • Tx level, Rx level, S/N ratio, EQM value, delay, phase jitter, freq. offset, far-end freq. offset, far-end echo, DTE format, retrain count, Tx baud rate, Rx baud rate, Tx carrier, Rx carrier, Tx speed, Rx speed, Tx power back-off level, Interface LED monitoring
    Memory
    • Non-volatile; 10 user profiles and 10 phone numbers with 30 characters each
    Line Interface
    • Cx/ Nx: RJ-11 for dial-up, JM8 (like RJ45) for leased line
    • NDx: 6-pin Terminal Block or 50-pin Centronics
    Transmit Clock
    • Internal, Loopback, or External
    Dialing Command and Type
    • Extended AT and V.25bis using Tone/ Pulse/ Mixed
    Flow Control
    • RTS/ CTS, XON/XOFF, CTS only
    Power Requirements
    • Standalone: 100 ~ 240VAC Auto-range (±10% for full range), 47 ~ 63 Hz
    • Rack-Mount -36 ~ -72VDC (optional), 90 ~ 260 VAC & 110 VDC (optional)
    • Dual redundant power unit for rack (optional)
    Dimensions and Weight
    • Standalone: 180(W) x 48(H) x 262(D) mm; 0.93 Kg
    • Line card: 220(W) x 19(H) x 328(D) mm; 0.6 Kg
    • Rack-Mount: 482(W) x 220(H) x 380(D) mm; (chassis) 8 Kg
    Operating Environment
    • Operating temperature: 0°C ~ 50°C
    • Storage temperature: -25°C ~ 70°C
    • Relative humidity: up to 95% (non-condensing)
    Certification
    • CE LVD, FCC

  • Application

    Application