
Configuring Line Services
2-18 115391-A Rev. A
MCE1 and MCT1 Overview
Multichannel E1 (MCE1) and T1 (MCT1) interfaces provide high-density access
to digital access and crossconnect systems (DACS). MCE1 also provides a variety
of international PTT and Telecommunications Administration services.
Multichannel interfaces enable data to be segmented into multiple DS-0
connections. This allows you to maximizes remote link capacity by allowing
individual DS-0 channels to be used separately or grouped. You can form
Fractional T1 channels by grouping MCT1 DS-0s.
An MCT1 interface can transmit or receive up to 24 DS-0 (56/64 Kb/s) channels
per DS-1 frame over leased point-to-point links. The MCE1 interface can transmit
or receive up to 30 DS-0s (64 Kb/s).
The MCE1 and MCT1both include an integrated DSU/CSU for direct connection
to an E1 or T1 network. The interfaces provide integrated support for loopback
testing and basic error rate test (BERT) line testing.
Synchronous Overview
A synchronous interface connects a BayStream platform or switch to a DCE, such
as DSUs, CSUs, and modems. The synchronous interface supports a range of
physical connections including V.35, RS232, RS449/422 balanced, and X.21.
The synchronous interface supports many WAN software services, including PPP,
Frame Relay, HDLC encapsulation, and ATM DXI. A single synchronous
interface operates from 1200 b/s to a maximum of 2.048 Mb/s, full duplex.
The synchronous interface supports both leased and dial-up circuits. Dial
Back-up, Dial-on-Demand, and Bandwidth-on-Demand using Raise DTR and
V.25bis dial signaling are supported over V.35, RS232, and X.21 interfaces.
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