Nortel Communication Server 1000 Fundamentals page 14

14 Description
Supporting remote sites rather than multiple switches is attractive for a
number of reasons. Remote sites allow the sharing of voice mail and other
peripherals, the sharing of software upgrades, and the maintenance of a
single database from a single location. MCR provides a cost-effective,
feature-rich solution for the majority of remote site applications.
With Carrier Remote IPE or Fiber Remote IPE, each remote site consumes
an entire Superloop slot. With MCR, however, remote telephones
consume the same level of switch resources as local telephones.
Minimization of switch resource consumption at each remote site allows
one IPE shelf to support up to eight remote sites. If fewer than eight sites
are needed on a particular shelf, the remaining card slots may be used
for local telephones.
MCR consists of three circuit packs: two at the local site, the Local
Mini-carrier Interface card ( LMI) and Local Mini-carrier Extender card
( LMX); and one at the remote site, the Remote Mini-carrier Interface card
( RMI). At the local site, the LMI emulates two standard IPE line cards and
can interface to the remote site through either one or two T1 carrier links.
Up to three LMXs may be added to the LMI to increase the number of
telephones serviced at the remote site. Each LMX, a double-wide circuit
pack, remote two additional line cards. A maximum of eight line cards may
be remoted by one Mini-Carrier Remote system.
At the remote site, MCR uses the existing cabinet and power supply,
standard IPE line cards, and the RMI. The RMI is inserted into the core
processor slot of the cabinet. This allows customers with a system at
the main location and smaller locations, to upgrade the smaller sites to
remote sites while protecting the bulk of their investment (cabinets, power
supplies, line cards, cabling, and telephones). The MCR system supports
Extended Digital Line Cards (XDLCs), Extended Universal Trunk cards
(XUTs), and Extended Message-waiting Line Cards (XMLC) at the remote
sites.
Objectives
MCR's objectives are to provide:
•
a cost-effective method for remoting digital telephones, analog
(500/2500-type) sets, and analog trunks from a local switch,
•
remote survivability during link failure,
•
fractional T1 use,
•
increased availability of superloop network card slots (MCR uses no
additional network cards).
Nortel Communication Server 1000
Mini-Carrier Remote Fundamentals
NN43001-557 04.01 4 June 2010
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