Nortel Communication Server 1000 Fundamentals page 24

24 Description
One Mini-Carrier Remote system supports eight IPE cards physically
located up to 4000 miles apart (depending on actual T1 routing) over
as many as 2 standard T1 (1.544 Mbps) facilities. MCR survives up to
54 milliseconds (ms) of delay. For analog channels, echo cancellers are
recommended for round-trip T1 delays of greater than 5ms. MCR signaling
channels 1 and 2 must not go through echo cancellers.
Note:
MCR Firmware Release 12.01 introduced:
•
requirement for the NT7R76AA A0538671 Flash Upgrade Module, one
module to be installed on each LIM, LMX and RMI card.
•
Support for the M2006, M2008, M2250, M3890x Phase 1-3 digital
telephones for Normal and Emergency Stand-Alone Mode.
•
M3904 and M3905 digital phone DBA Support.
•
Preservation of key labels of the M390x telephones when ESAM is
configured.
•
T1 span failure and call recovery algorithm — allows dynamic
movement of existing calls from a failed T1 span to available time slots
on the second T1 span.
•
Provision backup/restore — a backup copy of the ESAM database on
the MCR can be made to a PC over the serial port.
System characteristics
The MCR system:
•
is compliant with North American requirements,
•
remotes existing digital and analog line cards as well as the existing
analog universal trunk card,
•
supports existing design versions of the cabinets including AC and DC
power options as well as the existing environmental requirements for
both local and remote sites,
•
supports existing design versions of the IPE module, cabinet and
power components for use at the local site,
•
possesses limited call processing capability, referred to as Emergency
Stand-Alone Mode (ESAM), during link failure or initial installation at
the remote site,
•
employs a super set of the Man-Machine Interface (MMI) used in the
Carrier Remote Interface product. The Mini-Carrier Remote system
uses the same type of extensive carrier diagnostics that have proven
useful on the Carrier Remote IPE product,
Echo cancellers must not be used for data calls.
Nortel Communication Server 1000
Mini-Carrier Remote Fundamentals
NN43001-557 04.01 4 June 2010
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