Alcatel-Lucent 7750 SR OS Interface Configuration Manual page 399

ds3
Syntax [no] ds3 [sonet-sdh-index]
Context config>port>tdm
Description
This command enables the context to configure DS-3 parameters. DS-3 lines provide a speed of
44.736 Mbps and is also frequently used by service providers. DS-3 lines carry 28 DS-1 signals and a
44.736 Mbps data rate.
A DS-3 connection typically supports data rates of about 43 Mbps. A T-3 line actually consists of 672
individual channels, each supporting 64 Kbps. T-3 lines are used mainly by Service Providers to
connect to the Internet backbone and for the backbone itself.
Depending on the MDA type, the DS-3 parameters must be disabled if clear channel is enabled by
default (for example, on the m12-ds3 MDA). Clear channel is a channel that uses out-of-band
signaling, not in-band signaling, so the channel's entire bit rate is available. Channelization must be
explicitly specified. Note that if DS-3 nodes are provisioned on a channelized SONET/SDH MDA
you must provision the parent STS-1 SONET/STM0 SDH path first.
North America uses the T-Carrier system while Europe uses the E-Carrier system of transmission,
using multiples of the DS system. Digital signals are carried inside the carrier systems.
The no form of this command disables DS-3 capabilities.
Default
none
Parameters
sonet-sdh-index — Specifies the components making up the specified SONET/SDH Path. Depending
e1
Syntax e1 [e1-id]
Context config>port>tdm
Description
This command enables the context to configure E-1 parameters. E-1 is a basic time division
multiplexing scheme used to carry digital circuits. It is also a standard WAN digital communication
format designed to operate over copper facilities at a rate of 2.048 Mbps.
North America uses the T-Carrier system while Europe uses the E-Carrier system of transmission,
using multiples of the DS system. Digital signals are carried inside the carrier systems.
The no form of this command disables E-1 capabilities.
Default
none
Parameters
e1-id — Specifies the E-1 channel being created.
7750 SR OS Interface Configuration Guide
on the type of SONET/SDH port the sonet-sdh-index must specify more path indexes to specify
the payload location of the path. The sonet-sdh-index differs for SONET and SDH ports.
Values
E1: 1 — 21
Interface Configuration
Page 399