BayStack 150 Series 10BASE-T Hubs
Overview
Manageable, cost-effective hubs deliver a scalable
solution designed for growing networks.
- Scalable from 12 to 192 Nodes
- Highly Affordable
- Fully Integrated into Optivity
- Web-based Management
The BayStack* 150 Series 10BASE-T Hubs offer a simple, scalable shared media solution for growing Ethernet networks. Delivering industry-standard IEEE 802.3i 10BASE-T connectivity for supporting 10 megabit-per-second (Mbps) Ethernet over unshielded twisted pair (UTP) cabling, the hubs provide a robust, expandable foundation for networks that are anticipating future growth.
Management capabilities are integrated in the BayStack 150 and BayStack 152 Hubs via a built-in network management module (NMM). One hub/NMM provides complete management for an entire 8-hub stack. A
single hub/NMM can also control and
monitor multiple segments separated by as much as 100 meters through the hub's cascade connectors. For local management, a concise, understandable, easy-to-read LED display allows for at-a-glance network monitoring, including hub position within the stack.
The BayStack 150 Series 10BASE-T Hubs
are an integral part of the BayStack Ethernet product family. Working with other BayStack products including hubs, switches, routers, and Internet access equipment, the BayStack 150 Series 10BASE-T Hubs offer a cost-effective, scalable solution for small networks, client/server workgroups, and remote offices.
Scalable from 12 to 192 Nodes
The BayStack 150 Series Hubs deliver a
simple, cost-effective method for starting and growing Ethernet networks. A single hub can support from 12 to 24 users, and as requirements grow more hubs can be added to the
system to support new users. Up to 8 hubs can be stacked using standard Category 5 UTP cabling to support a total of 192 nodes. The network is able to grow with the business,
protecting initial investments in hardware
and software.
Highly Affordable
The BayStack 150 Series Hubs provide an
inexpensive, manageable solution for growing Ethernet networks. As the network grows, additional hubs can be added for an incremental investment, providing a scalable, cost-effective solution that supports expanding network
environments. The BayStack 150 or BayStack 152 Hub/NMM's ability to extend management to every hub in the stack contains
management costs.
Fully Integrated into Optivity
The BayStack 150 Series Hubs are fully
integrated into Optivity* network management software, enabling complete SNMP support and support for four RMON groups. Network administrators can manage their entire
network, including all hubs, switches, and routers from a single management station
using Optivity.
Web-based Management
The BayStack 150 and 152 Hub/NMM models also include web-based network management software, allowing network administrators to easily access key data and information such as device summary, configuration, and support. This feature provides an HTML formatted graphical user interface via the World Wide Web that allows users to access data about their network and individual hubs from anywhere
in the world.
Table 1 shows the four BayStack 150 Series 10BASE-T Hubs that are available:
Table 1:
Port and Network Management Configurations of the BayStack 150 Series 10BASE-T Hubs.
| BayStack 150 Series 10BASE-T Hubs |
10BASE-T Ports |
Recessed AUI Port |
Built-in Network Management Module (NMM) |
| 150 |
24 |
Yes |
Yes |
| 151 |
24 |
Yes |
- |
| 152 |
12 |
Yes |
Yes |
| 153 |
12 |
Yes |
- |
All four hubs feature a built-in, recessed AUI port, providing connectivity to a variety of media such as 10BASE-FL fiber, 10BASE-2 coaxial, 10BASE-T UTP, or AUI coaxial cables via external transceivers.
Management Capabilities
The BayStack 150 Series Hub/NMMs provide all of the capabilities of the Standard SNMP agent, and also offer Advanced-level management for all hubs residing on the same segment as the hub/NMM. Autotopology, a key feature, automatically creates maps that offer both
logical and physical views of the network, enhancing the ability to monitor network operations. In addition, the hub/NMMs
provide the following functionality:
- RMON support for IETF RMON MIB (RFC 1271) Alarms and Events Groups, Statistics, and History.
- Supports up to 288 user-configurable
thresholds. Thresholds can be applied to any counters on ports, hubs, or segments.
- Support for intrusion control and eavesdrop protection on a per-port basis.
- Software-based redundant links. Any two 10BASE-T ports in a stack with a hub/NMM installed may be designated as a redundant pair through Optivity. If one link fails, the standby link will automatically be enabled.
Isolated hubs act as separate collision domains, allowing network managers to proactively
tune the network as the network traffic level dictates. An internetworking device, such as
a switch, can be used to connect isolated
hubs to the cascade in order to pass data among them.
Automatic Stack Position Resolution
Automatic Stack Position Resolution* enables the BayStack 150 Series Hubs to detect the top and bottom of the stack and apply the appropriate termination to the bus, eliminating the need to set a switch manually to indicate a hub's position in the stack. If any hub fails or loses power, the cascade automatically bypasses that hub.
Real-Time Hub Status at a Glance
For wiring closet management, the BayStack 150 Series Hubs offer a unique bar graph display that provides real-time hub performance data for at-a-glance network monitoring. The display includes data and collision LED meters, port link and partition status LEDs, and power and initialization status LEDs. The LED matrix provides a complete summary of hub activity and configuration for rapid
on-site management.
Reliability Features
The BayStack 150 Series Hubs are designed
to provide the highest levels of reliability to ensure uninterrupted network operations. The field removable/replaceable power supply ensures minimal downtime in networking environments where expensive redundant power systems are not required. In addition, the SmartSwap* feature saves configuration information in nonvolatile memory, and automatically restores hub configurations following power cycles or hub replacements. Redundant clock crystals allow any hub to provide clocking for an entire stack; should a hub providing the clock fail, another hub will automatically take over.
The BayStack 150 Series Hubs also include other features to ensure trouble-free operation. Per-port polarity detection and correction automatically compensates for wire-pair
reversals on 10BASE-T receive data lines to maintain data flow, and per-port autopartitioning disconnects any port that experiences excessive consecutive or particularly long
collisions, or a single packet of excessive length.
Figure 1:
Workgroup Performance Enhancement Using BayStack Hubs and Switches.
APPLICATIONS
BayStack 150 Series Hubs offer a simple,
scalable, plug-and-play networking solution. Working with other BayStack products, they provide a solid foundation for future expansion. As shown in the diagram, BayStack 150 Series Hubs provide connectivity to 10 Mbps Ethernet workgroups (see Figure 1).
As the network grows and segmentation is required to alleviate bandwidth congestion,
the addition of a BayStack 310-24T Switch provides high-performance links between
segments to enhance network performance. The Fast Ethernet port on the switch can be used to provide Ethernet workgroups with a "big pipe" connection to high-utilization devices such as departmental servers, while a second port, made available through the installation of an optional Media Dependent Adapter (MDA), can be used to create a copper or fiber uplink from network centers.
In environments where increasing network traffic is expected, the BayStack 350 Switches provide the most cost-effective migration path to Fast Ethernet. These all-in-one switches
provide segment switch for workgroups
consisting of 10 Mbps and 100 Mbps shared media end-stations (see Figure 2).
- For the complete electromagnetic emissions statements and declaration of conformance,
see Installation and Reference for the BayStack 150 Series Ethernet Hubs (Nortel Networks part number 893-01021).
- Compliance with the VCCI regulation is dependent upon the use of shielded AC power cables. The user is responsible for procuring the appropriate cables.
Figure 2:
BayStack 150 Series 10BASE-T Hubs in a High-Performance Network Environment.
Table 2:
BayStack 150 Series 10BASEŠT Hubs Technical Specifications.
| Network Protocol
|
| |
10BASE-T Ethernet |
| Standards Support
|
| |
IEEE 802.3 CSMA/CD
IEEE 802.3i 10BASE-T
|
| Electrical Specifications |
| Power consumption |
|
Models 150 and 152 |
50W |
|
Models 151 and 153 |
20W |
| Thermal Rating |
|
Models 150 and 152 |
170 BTU/hr.max. |
|
Models 151 and 153 |
68 BTU/hr.max. |
| AC line frequency |
50 to 60 Hz |
| Physical Specifications |
| Weight |
Models 150 |
6.2 lb (3.0 kg) |
|
Models 151 |
5.5 lb (2.7 kg) |
Models 152 |
6.0 lb (2.9 kg) |
|
Models 153 |
5.3 lb (2.6 kg) |
| Dimensions |
(H) 1.73 in. x (W) 17.2 in. x (D) 8.46 in.
[(H) 44.4 mm x (W) 441 mm x (D) 217 mm] |
| Rack space |
One rack unit per hub (19 inch) |
| Environmental Specifications |
| Operating temperature |
0o to 50o C |
| Storage temperature |
-20o to 65o C |
| Operating humidity |
20% to 80% maximum relative humidity, noncondensing |
| Storage humidity |
5% to 90% maximum relative humidity, noncondensing |
| Ventilation clearance |
Minimum 2 in. (5.08 cm) on all sides (stacking OK) |
| Operating conditions |
At least 6 ft (1.83 m) to nearest source of electromagnetic noise |
| Power source availability |
Adequate power source within 6 ft (1.83 m)
|
| Recommended wiring closet service clearance |
5 in. (front); 7 in. (rear)
|
| Safety Agency Approvals
|
| |
UL-listed
TUV-licensed |
| Electromagnetic Emissions Summary |
| |
Meets requirements of FCC Part 15, Subpart B, Class A
VCCI Class 1 ITE
EN 55 022 (CISPR 22, Class A)
AS/NZS 3548 Class A
EN 50082-1 Susceptibility
Π|
Table 3:
BayStack 150 Series 10BASE-T Hubs Ordering Information.
| Order Number |
Description |
| CG1001?11* |
BayStack 150 Hub/NMM with 24 RJ-45 ports |
| CG1001?12* |
BayStack 151 Hub with 24 RJ-45 ports |
| CG1001?13* |
BayStack 152 Hub/NMM with 12 RJ-45 ports |
| CG1001?14* |
BayStack 153 Hub with 12 RJ-45 ports |
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