ADTRAN ISU 128 user manual Connector Type, RTS Options, CTS Options, CD Options, DTR Options

Models: ISU 128

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Chapter 6. Configuration

Connector Type

The ISU 128 can provide an EIA-232, RS-530, or V.35 interface to a DTE by se- lecting the desired connector type.

RTS Options

Selecting 1 MS delay causes the Clear-to-Send (CTS) signal to change states 1 millisecond after the DTE Ready-to-Send (RTS) signal changes state. The 18 MS delay causes the CTS signal to change state 18 milliseconds after the DTE RTS signal changes state.

CTS Options

Selecting Forced CTS causes the CTS signal on the DTE connector to be con- tinually asserted. Selecting Follows RTS causes the CTS signal to follow the state of the RTS lead.

CD Options

Selecting CD Forced on causes the carrier detect (CD) signal to always be as- serted. Selecting Normal causes the CD signal to be asserted when a call has been successfully established. Selecting Off with LOCD causes the CD signal to be disasserted for a period of 5 seconds, then reasserted at the termination of a call. Selecting Off with Link Down causes the CD signal to be disasserted when the U-interface is not present.

DTR Options

Selecting Ignore DTR causes the ISU 128 to disregard the state of the data ter- minal ready (DTR) pin. Cmd when Off forces the unit into the AT command processor mode when DTR is not asserted. To return on-line, DTR must be as- serted, followed by the AT0 command. Idle when Off forces the unit to end the current call when DTR is no longer asserted. Off>On dial #0 allows one call attempt to be automatically established when the DTR signal goes from in- active to active. While DTR is active, front panel dialing is also possible.

When DTR goes inactive, any outgoing call present is disconnected. Off>On dial #0uses the phone number in stored number register 0 to establish the call. To store a number for automatic dialing see the chapter Dialing Options. Se- lecting Dial #0 if On allows calls to be automatically established when the

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ISU 128 User Manual

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ADTRAN ISU 128 user manual Connector Type, RTS Options, CTS Options, CD Options, DTR Options

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.