XON/XOFF

A handshaking, flow control mechanism that communicates that the device is ready to accept more data. The flow control embedded into the data stream by using special characters with hence transmit on (XON), or transmit off (XOFF) often referred to as software flow control.

CTS/RTS

CTS stands for Clear To Send. RTS stands for Request To Send, a handshake line in which the computer tells the modem it can accept new data.

DCD

Data Carrier Detect

DSR

Data Set Ready. Supplied by the modem to indicate it has power and is ready to accept commands.

DTR

Data Terminal Ready. Signal generated by the computer to indicate it can accept data from the modem.

DUPLEX

A communication system that is capable of communicating in both directions can be half duplex or full duplex. Half duplex allows communication in both directions, but only one direction at a time, while full duplex allows data to transmitted in two directions simultaneously.

OFF-HOOK

Pick-up a telephone receiver. You take the modem off hook to dial or answer and it remains off hook while you are connected.

ON-HOOK

Hangs up a telephone receiver. You are not connected to Telephone Central Office when the modem is on hook.

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Jaton V.90 user manual Dcd
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V.90 specifications

The Jaton V.90 modem is a classic example of 56K technology that revolutionized dial-up internet connections in the late 1990s. As one of the early models supporting the V.90 standard, this modem enabled users to experience faster internet speeds compared to its predecessors. The V.90 protocol allowed for a maximum download speed of 56 Kbps, offering significant improvements over the previous V.34 modem, which capped out at 33.6 Kbps.

One of the standout features of the Jaton V.90 is its ability to adapt to different line conditions, ensuring optimal performance regardless of the quality of the telephone line. The V.90 standard provided a retransmission mechanism that allowed data to be resent if errors occurred during transmission, improving reliability and reducing the likelihood of dropped connections.

The modem incorporates technologies such as error correction and data compression. With built-in error correction protocols like V.42 and MNP, the Jaton V.90 can detect and correct common transmission errors, which is vital in maintaining a stable connection. The data compression technology, which uses MNP Class 5, enhances throughput by compressing data before transmission. As a result, users could effectively increase their upload speeds and minimize latency, creating a more seamless browsing experience.

The hardware features of the Jaton V.90 modem typically include a standard RJ-11 telephone connector, which makes it easy to connect to existing phone lines. The modem may come with both internal and external configurations, allowing flexibility depending on user preferences and system requirements. The external version often features indicator LEDs that provide real-time feedback on connection status, data transfer activity, and power status.

Compatibility is another crucial aspect of the Jaton V.90 modem. Operating with a variety of systems, it was designed to work with Windows, Mac OS, and other operating environments, making it accessible for a wide range of users. Additionally, the modem generally supports various software applications for easy configuration and management.

Ultimately, the Jaton V.90 modem played a pivotal role in facilitating internet access during a transformative period, laying the groundwork for future high-speed connections. While modern broadband solutions have since eclipsed dial-up speeds, the legacy of the Jaton V.90 as a reliable and innovative piece of technology remains significant in the history of internet connectivity.
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