1. Introduction
1-4
March 2001
8820-A2-GN20-30
Hotwire 8820 GranDSLAM Features
The Hotwire 8820 GranDSLAM chassis has the following special features:
Dual Power Access
The GranDSLAM chassis provides both front and rear power access, each
capable of accepting two independent 48 VDC power inputs. Front power
access is made through two Power Entry Modules (PEMs), located on the
front of the chassis. Rear power access is made on the back of the chassis,
directly to the backplane-mounted screw terminals located behind two
removable metal covers. At the option of the user, the 48 VDC power input
connections can be made either through the two PEMs on the front, or through
the screw terminals on the rear of the chassis, as long as both are not used at
once. However, for ease of maintenance, rear connection is recommended.
Power Redundancy
The two PEMs mounted in the front of the chassis provide power redundancy.
If one power source fails, the other PEM provides all of the power needed by
the system. This happens automatically without system disruption.
NOTE:
When using either front or rear power access, two separate power
sources must be provided to enable the power redundancy function of the
chassis. Also, the PEMs (A and B) must be installed even though rear
power is used.
Major/Minor Alarm Contacts for CO Alarm Requirements
The GranDSLAM provides two sets of dry contacts via the System Interface
Module (SIM), accessible through an 8-pin modular jack, for connection to a
CO alarm system.
LED Indicators for Power and Fan Status and Major and Minor Alarms
Five LEDs on the front panel of the GranDSLAM chassis indicate the status of
important functions (see
).
Hot Swappable Cards
The MCP and DSL cards can be installed and removed from the chassis
without service disruption to other cards. However, installing or removing the
SCM card will affect service to all cards using the ATM bus.
ATM Uplink
The ATM uplink provides various network services, applications, and protocols
(including DS3, OC3, E3, DS1 IMA and E1 IMA) over a common ATM
transport and switching system.
Network Equipment-Building System (NEBS)
The GranDSLAM is NEBS certified.
