Appendix D. S-Register List

S11 FALLBACK DEFAULT Determines how the ISU 128 answers an incoming call if all of the protocols in Fallback failed.

1= Clear Channel

2= BONDING Mode 1

3= SAP

4= T-link

5= V.110

6= V.120

7= V.34

8= DSU 57.6 Async (default)

9= PPP asyn-syn

S12

ESCAPE TIME

Determines the delay required immediately before

 

 

and after entering the escape command for the ISU 128

 

 

to recognize and execute the command.

 

 

Range = 0 to 127

 

S14

MISC BITS

Miscellaneous bits (bit 8 is most significant bit).

 

 

Bit 2

=

1: Enables on-screen echo of AT commands.

 

 

Bit 2

=

0: Disables on-screen echo of AT commands.

 

 

Bit 3

=

0: Enables AT responses from the ISU 128.

 

 

Bit 3

=

1: Disables AT responses from the ISU 128.

 

 

Bit 4

=

1: Enables AT responses to be displayed in

 

 

 

 

text form.

 

 

Bit 4

=

0: Enables AT responses to be displayed in

 

 

 

 

numeric form.

 

 

Bit 7

=

1: Disables PPP ACCM Spoofing.

 

 

Bit 7

=

0: Enables PPP ACCM Spoofing.

 

 

Bit 8

=

1: Ring indicator uses cadence.

 

 

Bit 8

=

0: Ring indicator remains on.

S15

ASYNC BONDING

0 = ADTRAN Only

 

 

1 = Multi-Vendor

S22

MSG BITS

Miscellaneous message bits (Bit 8 is most significant

 

 

bit).

 

 

 

 

 

Bit 5

=

Bit 6 =

Bit 7 = 1 : Allows connect message

 

 

 

 

 

with baud rate.

 

 

Bit 5

=

Bit 6 =

Bit 7 = 0 : Connects message without

 

 

 

 

 

baud rate.

S24

V120 LLC

Value determines whether the V.120 bit is set in setup

 

 

message for CCITT V.120 calls. Some terminal adapters

 

 

require this bit be set to connect V.120 calls.

0= Set V.120 bit in call setup message. (default)

1= Do not set V.120 bit in call setup message.

108

ISU 128 User Manual

61202.029L2-1

Page 123
Image 123
ADTRAN ISU 128 user manual Escape Time, Misc Bits, Async Bonding, MSG Bits

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.