Chapter 4—MODEM AT Commands, S-Registers, Result Codes

Dialing Commands

Use dialing commands to dial and hang up.

Ds Dial

s = phone number Default: none

The letter D in a command causes the modem to dial the telephone number immediately following it. For example, if you type ATD5551212<cr>, the modem dials the number 555-1212.

The ISIHI-2S modem supports several dialing methods. With the D command, you can specify either pulse (ATDP) or tone (ATDT) dialing. You also can modify the dialing command with several other characters that are explained in the Dial Modifier Commands section, later in this chapter.

The modem also lets you select either smart (wait-for-dial-tone) dialing or blind dialing. With smart dialing, the modem waits for and detects dial tones and busy signals. With blind dialing, the modem works with timed pauses (determined by the value of register

S6), not dial tone and busy signal detection. See the X command for more information on blind and smart dialing.

Hn On-Hook/Off-Hook

n = 0 or 1 Default: 0

Use the H command to make the modem hang up (go on-hook) or simulate the action of picking up a telephone handset (go off-hook).

H0 (or H) hangs up the modem

H1 brings the line off-hook, just as if you had picked up the telephone handset.

It is not necessary to use the H1 command to bring the line off-hook when using the D command. The modem automatically goes off-hook when you press ENTER at the end of the dial command.

Modem

Dial Modifier Commands

The dial string can include the digits 0 through 9, the pound sign (#), the asterisk (*), and the letters A, B, C, or D. The latter are used by some PBXs; the exact function will depend on the PBX manufacturer’s feature set and implementation. There are also several command characters, called “dial modifiers,” that can be included within a dialing command after the letter D. Their functions include pulse or tone dialing, pauses in the dial sequence, automatic redials if a number is busy, and reverting to command mode or switching to answer mode after dialing.

LRedial Last Number Default: none

You can redial the last number dialed by entering L immediately following the dial command (ATD). This command is handy if you encounter a busy signal and want to try the call again.

MultiModemISI Hybrid Series, ISIHI-2S

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Multi Tech Equipment ISIHI-2S manual Dialing Commands, Dial Modifier Commands, Ds Dial, Hn On-Hook/Off-Hook
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ISIHI-2S specifications

The Multi Tech Equipment ISIHI-2S is a cutting-edge device designed to meet the demands of diverse industries, including manufacturing, construction, and telecommunications. This innovative piece of equipment is characterized by its versatile functionality, user-friendly interface, and robust construction, making it an ideal choice for professionals looking for reliability and efficiency.

One of the standout features of the ISIHI-2S is its advanced automation capabilities. Equipped with state-of-the-art sensors and control systems, this equipment can perform various tasks with minimal human intervention. This not only enhances productivity but also reduces the risk of errors associated with manual operation. The automation technology embedded in the ISIHI-2S allows for seamless integration into existing workflows, streamlining processes and significantly improving operational efficiency.

The ISIHI-2S also boasts a highly durable design. Constructed from high-quality materials, it is engineered to withstand harsh environments and heavy usage, ensuring longevity and reduced maintenance costs. The rugged build of the device is complemented by its lightweight nature, facilitating easy transportation and setup in various locations.

A user-friendly interface is another characteristic that sets the ISIHI-2S apart from its competitors. The intuitive control panel features a clear display, making it easy for operators to monitor performance and make adjustments as necessary. Furthermore, the device supports remote monitoring and control, allowing users to manage operations from a distance, which is particularly beneficial in large-scale projects.

In terms of technology, the ISIHI-2S incorporates advanced data analytics capabilities. Users can easily access and analyze performance data, enabling them to make informed decisions based on real-time metrics. This data-driven approach can lead to optimized operation strategies and more effective resource management.

Moreover, the versatility of the ISIHI-2S is evident in its ability to accommodate a range of attachments and accessories. This adaptability makes it suitable for various applications, from heavy lifting to intricate assembly tasks, catering to the unique needs of different industries.

In conclusion, the Multi Tech Equipment ISIHI-2S is a powerful tool that combines advanced technology, durability, and ease of use. Its automation features, robust design, user-friendly interface, and data analytics capabilities make it a preferred choice for professionals seeking reliable equipment to enhance their operational efficiency. Whether in a construction site or a manufacturing facility, the ISIHI-2S is set to revolutionize how tasks are approached and executed.
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