
Configuring WAN Line Services
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Overview of MCE1 and MCT1 Services
Nortel Networks supports MCE1 and MCT1 circuits on a router that contains one
of the following MCE1 or MCT1 modules:
MCE1 and MCT1 interfaces provide high-density access to a digital access and
crossconnect system (DACS). MCE1 also provides a variety of international Post
Telephone and Telegraph (PTT) and telecommunications administration services.
Multichannel interfaces enable data to be segmented into multiple DS0
connections, called channels or timeslots. You can form fractional T1 (FT1)
channels by grouping MCT1 DS0s. This allows you to maximize remote link
capacity by using DS0 channels individually or in groups.
An MCT1 interface can transmit or receive up to 24 DS0 channels per DS1 frame
over leased point-to-point links, with a line rate of 56 or 64 Kb/s. An MCE1
interface can transmit or receive up to 30 DS0 timeslots at 64 Kb/s.
In addition to the supported speeds provided by other MCT1 modules, the
Quad-Port Multichannel T1 with DS0A (QMCT1 w/ DS0A) link module supports
the DS0A subrate frame format standard, which enables the interface to support
SDLC traffic at line speeds of 19.2 Kb/s and 9.6 Kb/s.
All MCE1 and MCT1 modules include an integrated DSU/CSU for direct
connection to an E1 or T1 network. The interfaces provide integrated support for
loopback testing and bit error rate test (BERT) line testing.
Link Modules
(BLN and BCN routers)
Net Modules
(ASN and System 5000 routers)
MCE1 II Single-Port, 75 ohm MCE1 Single-Port
MCE1 II Dual-Port, 75 ohm MCT1 Dual-Port (DMCT1)
MCE1 II Single-Port, 120 ohm
MCE1 II Dual-Port, 120 ohm
MCT1 Single-Port
MCT1 Dual-Port (DMCT1)
MCT1 Quad-Port (QMCT1)
MCT1 Quad-Port (QMCT1) with DS0A
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