10

Network Service Module

Basic Rate ISDN Interfaces

Each Basic Rate S/T interface supports two 64kbit/s B channels and one 16kbit/s D channel, and operates in TE mode only. The switch or router should be configured as a TE for normal operation.

User-configurable jumpers provide 100Ω line termination. By default, the jumpers are factory set to terminate Rx and Tx, bridging terminals 2 and 3 (Figure 5 on page 10). To remove the line termination, move the jumpers so that they bridge terminals 1 and 2.

Figure 5: Location of jumpers on BRI NSMs

3 2 1

3 2 1

RJ45 and LED blocks

Jumper set to Not Terminated

Jumper set to Terminated (Factory default)

There are two jumpers per port. The AT-AR041 NSM, therefore, has sixteen jumpers, while the AT-AR042 NSM has eight jumpers. Each pair of jumpers set the Termination for the port that they are closest to.

You should install the termination jumpers (terminate Rx and Tx) if:

■termination is not provided by the building wiring, and

■the device is the only TE device on a Point-to-Point link between the NT and the TE, or the device is the last device on an S/T bus

You should remove the termination jumpers (not terminate Rx and Tx) if:

■termination is provided by the building wiring, or

■the device is one of a number of devices on an S/T bus, and is not the last device on an S/T bus

C613-03022-00 REV K

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Allied Telesis AT-AR041-00, AT-AR042, AT-AR048, AT-AR040-10 manual Basic Rate Isdn Interfaces, Location of jumpers on BRI NSMs
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AT-AR040, AT-AR040-10, AT-AR048, AT-AR041-00, AT-AR041 specifications

Allied Telesis has established itself as a reputable brand in the networking solutions market, and its AT-AR Series routers further exemplify their commitment to providing robust networking technology. The AT-AR042, AT-AR041, AT-AR041-00, AT-AR048, and AT-AR040-10 models come packed with features designed to meet the diverse demands of modern networks.

The AT-AR042 is a versatile router designed for small to medium-sized enterprises, offering advanced routing capabilities along with integrated security features. It supports a range of protocols, ensuring seamless connectivity across different network types. One of its standout characteristics is its support for Virtual Private Networks (VPNs), facilitating secure remote access for employees.

The AT-AR041 and the AT-AR041-00 models are specifically crafted to deliver dependable performance in both wired and wireless environments. They offer high-speed connectivity and are equipped with Layer 3 routing features, which is essential for effective traffic management in more complex network setups. These models also incorporate essential security protocols, reducing the risk of unauthorized access and ensuring data integrity.

The AT-AR048 extends the range of capabilities further with its advanced features aimed at larger organizations. It offers comprehensive Quality of Service (QoS) functionality, enabling prioritized traffic management which is particularly important in VoIP and video conferencing applications. Its multiple WAN support allows for load balancing, ensuring consistent uptime and optimized network performance during peak usage times.

Lastly, the AT-AR040-10 rounds out the series by offering a cost-effective solution without skimping on the essential features expected of a high-performance router. It comes with an intuitive management interface that simplifies configuration and monitoring, making it a favorable choice for IT staff.

Collectively, these routers incorporate technologies such as IPv6 support, SNMP for network management, and firewall capabilities to provide a secure and efficient networking environment. Additionally, they uphold the industry standards necessary for interoperability with existing systems.

In conclusion, the Allied Telesis AT-AR Series offers a range of products catering to the varying needs of businesses. From small offices to larger enterprises, these routers provide the essential features and capabilities needed to ensure reliable connectivity, secure access, and efficient network management. Their combination of performance, scalability, and security makes them an attractive choice for organizations looking to enhance their networking infrastructure.
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