Chapter 6. Configuration

Data Format (Asynchronous)

A frame consists of a start bit, 7 or 8 data bits, 0 or 1 parity bit, and 1 to 2 stop bits. The settings for Data Bits, Parity Bits, and Stop Bits are available as shown in Figure 6-18.

3=CONFIG

1=Netw. options

2=DTE options

3=Protocol

4=Quick setup

5=Remote config

 

 

 

 

 

 

1=Bit Rate

 

 

 

 

 

 

 

 

2=Connector Type

 

 

 

 

 

 

 

3=RTS Options

 

 

 

 

 

 

 

 

4=CTS Options

 

 

1=Asynchronous

 

 

 

5=CD Options

 

 

 

2=Synchronous

 

 

 

 

6=DTR Options

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7=DSR Options

 

1=Data Bits

 

 

 

 

 

 

8=Flow Control

 

 

 

 

 

 

2=Parity Bits

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9=Data Format

 

 

 

 

 

 

3=Stop Bits

 

 

 

 

 

 

 

 

1=8 Data Bits 2=7 Data Bits

1=None

2=Odd

3=Even

1=1 Stop bit 2=1.5 Stop bits 3=2 Stop bits

Figure 6-18

Data Format Menu Tree

Transmit Clock (Synchronous Data Format)

Selecting the Normal option causes the ISU 128 to be the synchronous DTE in- terface transmit timing source. Transmit data is timed from the transmit clock provided by the ISU 128 on the DTE connector. Normal clock is the normal mode of operation for the ISU 128.

With the External option selected, the ISU 128 slaves to an external transmit timing source. The external clock is provided to the ISU 128 by the external transmit clock signal at the DTE connector. This signal is echoed by the ISU 128 to the transmit clock signal on the DTE connector.

This option provides for situations where equipment connected to the ISU 128 DTE connector cannot slave to the ISU 128 provided clock. The ISU 128 uses the U-interface as the frequency standard when it must provide a synchronous receive or transmit clock. The externally provided clock must be of the same average frequency as the clock that the ISU 128 would provide if internal clock were selected. If this is not the case, then bit errors may occur.

61202.029L2-1

ISU 128 User Manual

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ADTRAN ISU 128 user manual Data Format Asynchronous, Transmit Clock Synchronous Data Format, Data Format Menu Tree
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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.
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