Nortel Networks NN43001-314 - Manual (Page 25)

MG 1000B (MGC) compared to the MG 1000B (SSC) 25
mgcsetup command. With a properly designed data network, the multiple
ELAN and TLAN interfaces can be used to implement a dual homed
configuration for the MG 1000B with MGC.
Four of these interfaces are accessed by using RJ45 connectors on the
faceplate. Two are reserved for ELAN and two are reserved for TLAN.
Two additional Ethernet connections are available if an Option 11C cabinet
is used. One is reserved for ELAN and one is reserved for TLAN.
For the Option 11C cabinets, to break out the two new 100BaseT Ethernet
connections, you need a new backplane adapter. This adapter replaces
the MDF-to-AUI cable used for the 10BaseT Ethernet connection on the
existing system.
One use for the additional LAN connections is to allow for network
redundancy, also known as dual-homing on the Release 4.5 MG 1000B.
The MGC Ethernet interface failover is accomplished with the embedded
Ethernet switch. The Ethernet interface failover feature requires no special
network configuration to function. The end customer decides if two separate
Layer 2 switches are used to implement the feature to minimize the service
outage. For more information see the Communication Server 1000E:
Installation and Configuration (NN43041-310) NTP.
Also, you can use the broadcast and multi cast rate limiting features of the
embedded Ethernet switch on the MGC to reduce the susceptibility of the
Call Server to broadcast storms and similar network issues, if you directly
cable the Call Server to the MGC.
In addition, certain debug features use the LAN connections (for example,
port mirroring.)
The MGC has two conference loops with thirty units each. The maximum
number of participants in a conference is thirty. On the MG 1000B, the
maximum number of conference loops was four with sixteen units in each
loop. The maximum number of participants in a conference was six.
The MGC has a four-character alphanumeric LED display on the faceplate.
the boot and application software use the display to show diagnostic
information to the technician.
The MGC has a clock reference input/output to support the requirements
of the Digital Enhanced Cordless Telecommunications (DECT) standard.
The DECT product requires a tight clock tolerance between cabinets with
interconnected radio equipment of ±5ppm. To accommodate the tight clock
Nortel Communication Server 1000
Branch Office Installation and Commissioning
NN43001-314 01.02 Standard
Release 5.0 20 June 2007
Copyright © 2007, Nortel Networks
.