Chapter 6. Configuration

DTR signal is in the active state. The unit attempts to establish a call using SN0 until the call is established or DTR goes inactive. Selecting Answer if On only allows the unit to answer an incoming call if the DTR signal is asserted. Dial/ Ans if On... allows the unit to dial Stored Number 0 or answer if DTR is assert- ed.

DSR Options

Selecting DSR forced on causes the Data Set Ready (DSR) signal on the DTE connector to always be asserted. Selecting OFF Idle+Test causes DSR to be disasserted if the network interface is in test or there is not an active call. OFF Link Down causes DSR to be disasserted if the network interface is disrupted.

Flow Control (Asynchronous Data Format)

Selecting Hardware Flow (as shown in Figure 6-17) causes the ISU 128 re- ceived data to be presented to the DTE interface only when RTS is asserted. Software Flow control uses Xon/Xoff to control data transferred between the DTE and the ISU 128. Selecting No Flow Ctrl disables flow control.

3=CONFIG

1=Netw. options

2=DTE options

3=Protocol

4=Quick setup

5=Remote config

1=Asynchronous

2=Synchronous

1=Bit Rate

2=Connector Type

3=RTS Options

4=CTS Options

5=CD Options

6=DTR Options

7=DSR Options

8=Flow Control

9=Data Format

1=Hardware Flow

2=Software Flow

3=No Flow Ctrl

Figure 6-17

Flow Control Menu Tree

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ISU 128 User Manual

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ADTRAN ISU 128 user manual DSR Options, Flow Control Asynchronous Data Format, Flow Control Menu Tree

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.