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Tenders are invited for Supply of external leased line modem for rtu connectivity, 2 wire / 4 wire operatioin, modem compatibility to v.32bis, v.32, v.22 bis, v.22 dte interface:rs232 (v.24), line impedance:600 ohm, operating voltage:9-36v dc, operating temperature:-10 to 70 degree centigrade, power consumption: less than 1 watt.
The Si2457, Si2434, Si2415 and Si2404 support V.90, V.34, V.32bis and V.22bis respectively over the Public Switched Telephone Network (PSTN) in both synchronous and asynchronous data formats.
When the switch falls to the B or spare side, a V.32bis modem will dial a preprogrammed number assigned to a dial modem at the network source.
Despite their credit card size, the ProClass PCMCIA 144 and ProC!ass PCMCIA 144 with EZ-Port provide all the attributes of sophisticated V.32bis desktop modems including DTE (computer to modem) speeds up to 115,200 bps and both Class 1 and 2 14400 bps fax capabilities.
The CMX869 V.32bis modem IC has been added to CML Microcircuits' portfolio of low-power wireline telecom data products.
The V.32terbo standard extends current 9.6K and 14.4K bps modem technology by providing two new data rates in a scheme otherwise like that of the 14.4K bps V.32bis. The MT1932BL provides the higher data rates while maintaining compatibility with lower-speed modems based on V.32bis, V.32, V.22bis and other common modulation standards.
However, a V.32bis dial-up modem could reduce this to 780 minutes per week or less, depending upon the vendor's bit compression scheme.
For example, a Codex 3260 series V.32bis modem at 38.4 kb/s throughput, might reduce this to 787 minutes per week, while an AT&T 3810 Software Defined (SD) series dial-up modem at 57.6 kb/s, would drop this to under 600 minutes per week.
The Allegro 8840 modem provides automatic dial restoral of leased lines and intelligent leased line monitoring, with support for V.32bis, V.33 and V.fast.
The DataPort 14.4/ FAX modems add V.32bis compliance for raw data line speed of 14,400 bps and throughput up to 57,600 bps.
They work well on weak lines because they have the first optical phone line interface (OLI) used in V.32bis modems.
The LanFast network modem contains an integral, fully compatible V.32bis, V.42bis, 14.4K bps modem.
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