Chapter 7. Protocol Options

3=CONFIG

1=Netw. options

2=DTE options

3=Protocol

4=Quick setup

5=Remote config

1=Clear Channel

2=BONDING mode 1

3=V.120

4=V.34

5=V.110

6=DSU 57.6 ASYNC

7=T-LINK

8=SAP

9=FALLBACK

0=PPP asyn-sync

Figure 7-1

Protocol Menu Tree

See the section Recommended Operating Protocols and Table 1-B in Chapter 1 for more information on recommended modes of operation.

The desired protocol may be selected with AT commands at the DTE port or from the ISU 128 front panel. A description of each protocol follows.

Clear Channel

Clear Channel provides the entire bearer channel to the DTE without regard to data format or protocol. This provides a rate adaptation at or near the ISDN circuit rate. The primary usage for Clear Channel in the dial line mode is for 56 kbps and 64 kbps synchronous. It is useful when the DTE performs its own internal synchronous protocol/rate adaptation or the ISU 128 is calling a 4- wire Switched 56 DSU. In the leased line mode, Clear Channel can provide synchronous bit rates of 56 kbps, 64 kbps, 112 kbps, and 128 kbps.

BONDING Mode 1

The BONDING mode 1 protocol allows the ISU 128 to communicate at bit rates in excess of 64 kbps to a maximum of 128 kbps. BONDING provides high-speed communication between ISU 128s, ISDN TE/TAs, and inverse multiplexing equipment supporting the BONDING protocol. The protocol al- lows use of both synchronous and asynchronous bit rates. When the ISU 128 uses the BONDING mode 1 protocol, it must make two separate ISDN phone calls to seize control of both ISDN bearer channels. The protocol corrects any delays existing between the two bearer channels and presents a single high speed data channel to the DTE. For successful high-speed operation, both the

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ISU 128 User Manual

61202.029L2-1

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ADTRAN ISU 128 user manual Clear Channel, Bonding Mode

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.