Chapter 3. Installation

DTE DATA CONNECTION

Data terminal equipment is connected to the ISU 128 by using either the RS- 530 interface, the V.35 interface, or EIA-232 interface on the rear panel of the ISU 128. The maximum recommended cable lengths are shown in Table 3-A. See the appendix Connector Pinouts for each interface pin assignments. Be sure to configure the menu option for the connector type used in your application. Refer to the section DTE Options for Asynchronous and Synchronous Operation in Chapter 6 to configure the connector type.

Table 3-A

Maximum DTE Interface Cable Lengths

DTE Interface

Max Cable Length

 

 

RS-530

50 feet

V.35

30 feet

EIA-232

15 feet

 

 

The RS-530 interface and the V.35 interface support data rates up to 128 kbps. The DTE rate is configured from the front panel of the ISU 128 or by using AT commands. See the chapter Configuration to configure the ISU 128 with the ap- propriate data rates.

To prevent possible radio frequency interference emissions, a shielded V.35 cable is required.

DIAL INTERFACE CONNECTION

If out-of-band RS-366 dialing is required for applications such as videoconfer- encing or FAX machines, the dialing interface of the host DTE should be con- nected to the dial port marked RS-366/Maintenance. Pin assignments for the RS-366 connector are listed in the appendix Connector Pinouts.

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ISU 128 User Manual

61202.029L2-1

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ADTRAN ISU 128 user manual DTE Data Connection, Dial Interface Connection, Maximum DTE Interface Cable Lengths

ISU 128 specifications

The ADTRAN ISU 128 is a versatile and robust integrated service unit designed for network access solutions, particularly within telecommunications and enterprise environments. This unit plays a critical role in enabling high-speed data transmission, supporting various voice, video, and data services over traditional and next-generation networks.

One of the noteworthy features of the ADTRAN ISU 128 is its ability to aggregate multiple digital circuits into a single access point. It supports T1, E1, and fractional T1/E1 interfaces, making it a flexible choice for customers with different bandwidth needs. The unit allows for seamless migration from legacy systems to modern broadband services, ensuring that businesses can scale their operations without significant infrastructure changes.

The ADTRAN ISU 128 also excels in its support for various protocols, including Frame Relay and ATM, providing the necessary flexibility to adapt to different network architectures. This adaptability is essential for businesses that rely on diverse communication platforms to maintain connectivity and operational efficiency.

Another significant aspect of the ISU 128 is its built-in features for diagnostics and monitoring. The unit includes comprehensive loopback and performance monitoring capabilities, which enable network administrators to troubleshoot potential issues proactively. This functionality ensures a reliable connection and minimizes downtime, which is critical for maintaining service-level agreements (SLAs).

In terms of user interface, the ADTRAN ISU 128 is designed with ease of use in mind. The unit can be configured and managed through a web-based graphical user interface, allowing for straightforward remote access to settings and performance metrics. This capability facilitates quick adjustments and upgrades, helping to streamline network management tasks.

The ISU 128 is also built with a strong emphasis on reliability and durability. It is housed in a compact, rack-mountable design, making it suitable for various deployment environments. These characteristics, combined with support for redundant power supplies, enhance the unit's reliability in critical operations.

Overall, the ADTRAN ISU 128 stands out as a powerful solution for organizations seeking to optimize their network access. With its advanced features, compatibility with multiple technologies, and emphasis on reliability, the ISU 128 is an ideal choice for those looking to enhance their communication infrastructure in a rapidly evolving digital landscape.