User Guide

the same as the data received on your monitor. If different data is appearing on your monitor, your modem is probably causing the problem, although it could also be your computer. If your modem passes this test, but you are receiving errors while On-line, the remote modem or the phone line could be at fault.

Digital Loopback Test/V.54 Loop 2 (Local/Manual)

The Digital Loopback Test is an on-line test that loops data sent from one modem across the phone line to another modem, then back to the first modem. See Figure 4-2. There are two ways to put a modem into Digital Loopback mode:

1.Locally or Manually, described here in section 4.2.

2.Remotely or Automatically, see section 4.3.

Note: If you wish to abort any test in progress, enter AT&T0<CR>.

All loopback tests will operate at all speeds except 300 bps. Disable er- ror correction (AT\N0&W0<CR>) before engaging in loopback tests. In this test the local modem is placed in Digital Loopback mode. Data is entered and transmitted from the remote modem (which is not in digital loopback mode), sent across the phone line to the local modem and looped back to the remote modem.

The test procedure is as follows:

1.Go into Terminal mode. Type AT and hit ENTER; you should get an OK message.

2.Dial the remote modem by entering the Dial command and the phone number, to establish On-line mode.

3.Type the Escape Sequence (+++) which brings your modem into Command mode, while still maintaining the pseudo On-line mode with the remote modem.

4.Type AT&T3 from the local PC and hit ENTER. Once you receive an OK message from your modem (if responses are enabled), the local modem is placed in Digital Loopback mode.

5.Data is typed from the remote keyboard. For this test, typing multiple upper case "U" characters is a good way to send an alternating test pattern of ones and zeros. The data received by the local modem will enter its analog receiver, be converted to digital data, be reconverted into analog, and then looped through its transmitter back to the remote

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Multitech MT5600ZDXV manual Digital Loopback Test/V.54 Loop 2 Local/Manual
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MT5600ZDXV, MT5600ZDX specifications

The MultiTech MT5600ZDX and MT5600ZDXV are state-of-the-art modems designed to offer reliable communication capabilities for a variety of applications. These devices are particularly favored in industrial, telecommunications, and enterprise settings due to their robust performance and versatility.

One of the standout features of the MT5600ZDX series is its ability to support both analog and digital signaling. This dual compatibility enables seamless integration with existing telecommunication infrastructure, making it an ideal choice for businesses looking to upgrade without overhauling their entire system. With ITU-T V.34 modem technology, these devices support high-speed data transmission rates of up to 56 kbps, ensuring quick and efficient data transfer.

The MT5600ZDX and MT5600ZDXV models come equipped with a comprehensive array of communication protocols, including PPP, TCP/IP, and the unique Multitech proprietary protocols. This broad compatibility allows for easy connection to various networks and devices, facilitating smooth data exchange across platforms.

Another notable feature is the built-in error correction and data compression capabilities. With technologies such as MNP, V.42, and V.42bis, users can expect enhanced data integrity and faster transmission speeds, which are particularly crucial in environments with high noise levels or signal interference. These features make the modems highly effective for remote monitoring applications, telemetry, and point-of-sale terminals.

Additionally, both models excel in terms of connectivity options. The MT5600ZDX includes a standard RS-232 interface, while the MT5600ZDXV offers an enhanced V.24 interface for those requiring additional communication flexibility. This variety in connectivity options ensures that users can integrate these devices into a wide range of systems, whether for industrial automation or remote data acquisition.

Durability and reliability are also core characteristics of the MT5600ZDX series. Designed to operate in challenging environments, they boast a wide operating temperature range and robust casing, making them suitable for deployment in harsh industrial conditions.

In conclusion, the MultiTech MT5600ZDX and MT5600ZDXV modems provide a feature-rich solution for organizations seeking high-performance communication. With advanced technologies, exceptional versatility in connections, and reliability in demanding settings, they continue to stand out as preferred choices for efficient industrial communication solutions. These devices not only enhance operational efficiency but also pave the way for future-proof connectivity in an increasingly digital world.
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