Nortel Networks 5399 User Manual
Nortel Networks 5399 Access Switch Hardware Installation Guide
Chapter 1
Introduction
1-4
Modems
The Model 5399 Remote Access Concentrator Module can be configured
with up to 62 internal DSP-based digital modems. The modems are
dynamically downloaded with images to configure them to the
appropriate protocol. The modems are located on plug-in modem cards
installed on the module.
with up to 62 internal DSP-based digital modems. The modems are
dynamically downloaded with images to configure them to the
appropriate protocol. The modems are located on plug-in modem cards
installed on the module.
System 5000 Common Management Bus
The management section of the backplane is the common management
bus (CMB), a high-speed, multimaster, shared-memory communication
channel that connects all modules installed in the hub to one another and
to the supervisory module. The modules installed in the hub use the CMB
to acquire and distribute configuration and status information.
bus (CMB), a high-speed, multimaster, shared-memory communication
channel that connects all modules installed in the hub to one another and
to the supervisory module. The modules installed in the hub use the CMB
to acquire and distribute configuration and status information.
The supervisory module is an intelligent interface between the Model
5000 chassis and user-installed modules. The supervisory module
provides the following services to other modules across the CMB:
5000 chassis and user-installed modules. The supervisory module
provides the following services to other modules across the CMB:
•
Maintains chassis component information and
environmental status
environmental status
•
Stores the primary module configurations
•
Restores the module configuration after the module power is
cycled or the module is reset
cycled or the module is reset
The supervisory module also supports configuration terminal support
through the service port on the front panel of the chassis.
through the service port on the front panel of the chassis.
System 5000 Backplane Ethernet Segment Banks
The chassis backplane Ethernet bus consists of 12 Ethernet segments,
divided into two banks of six segments each: segments 1 through 6 and
segments 7 through 12. Each Model 5399 Remote Access Concentrator
module installed in the chassis can be configured to access one bank of
six segments, either segments 1 through 6 or segments 7 through 12. For
more information, see
divided into two banks of six segments each: segments 1 through 6 and
segments 7 through 12. Each Model 5399 Remote Access Concentrator
module installed in the chassis can be configured to access one bank of
six segments, either segments 1 through 6 or segments 7 through 12. For
more information, see