Appendix D. S-Register List

S36

ERROR

Sets the type of error control to be negotiated with

 

CORRECTION

the far-end modem.

 

 

0

= Normal operation no error control. Allows speed

 

 

 

matching, buffering, and flow control.

 

 

1

= Direct error control, no error control. Does not allow

 

 

 

the terminal and ISU 128 to operate at different

 

 

 

speeds or use flow control.

 

 

2

= Reliable MNP error control. If the far end does

 

 

 

not use MNP error control then the call is ended.

 

 

3

= Auto-reliable MNP error control . The ISU 128

 

 

 

attempts to use MNP error control. If the far end

 

 

 

does not use MNP, then normal operation is used.

 

 

4

= Force LAPM. Force the modem to connect only

 

 

 

if V.42 (LAPM) error correct can be used.

 

 

5

= Force MNP. Force the modem to connect only if

 

 

 

MNP 2-4 error correction can be used.

S37

V34

Enables compression in the V.34 modem.

 

COMPRESSION

0

= No compression

 

 

1

= MNP5 compression

 

 

2

= V42 compression

 

 

3

= MNPS or V42 compression

S38

V34 BLOCK SIZE

Sets the amount of data sent in a single packet during

 

 

MNP error controlled stream operation.

 

 

0

= Block size of 64 bytes

 

 

1

= Block size of 128 bytes

 

 

2

= Block size of 192 bytes

 

 

3

= Block size of 256 bytes

S40

BOND TXINIT

Specifies the number of seconds the originating endpoint

 

 

attempts to detect the BONDING negotiation pattern

 

 

from the answering endpoint before deciding the

 

 

BONDING call has failed.

 

 

Range = 0 to 255, 10 sec is default

S41

BOND TXFA

Specifies the number of seconds both endpoints attempt

 

 

to detect the BONDING frame pattern when a call is

 

 

connected before deciding the BONDING call has failed.

 

 

When operating with other manufacturers' BONDING

 

 

equipment, it may be necessary to lengthen this timer so

 

 

that it matches TXADD01.

 

 

Range = 0 to 255, 10 sec is default

110

ISU 128 User Manual

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ADTRAN ISU 128 user manual Error, Correction, Compression, V34 Block Size, Bond Txinit, Bond Txfa

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.