Ct3 Interface; Overview - 3Com MSR 50 Series Configuration Manual

122 C 4: WAN I
HAPTER

CT3 Interface

Overview

C
NTERFACE ONFIGURATION
To do...
Display the state information
of a CE3 interface
Display the configuration and
state of a serial interface
formed on a CE3 interface
Shut down a CE3 interface
Bring up a CE3 interface
Shut down an E1 line
Bring up an E1 line
n
Shutting down/bringing up a CE3 interface also shuts down/brings up the E1
■
lines demultiplexed from the CE3 interface, the serial interfaces formed by the
E1 lines, and the serial interfaces created on E1 lines by means of timeslot
bundling.
Shutting down/bringing up an E1 line also shuts down/brings up the serial
■
interface formed by it and the serial interface created on it by means of
timeslot bundling.
To shut down/bring up only a serial interface formed by E3 or E1 lines, or by
■
timeslot bundling on an E1 line, perform the shutdown/undo shutdown
command in the view of the corresponding serial interface.
Both T3 and T1 belong to the T-carrier system promoted by ANSI. T3 uses the
digital signal level DS-3 and operates at 44.736 Mbps.
CT3 interfaces support two operating modes: T3 (unchannelized) and CT3
(channelized).
In T3 mode, a CT3 interface equals a synchronous serial interface with 44.736
■
kbps of data bandwidth, on which, no timeslots are divided.
In CT3 mode, a CT3 interface can be demultiplexed into 28 channels of T1
■
signals. Each T1 line can be divided into 24 timeslots numbered 1 through 24.
Different from E1, each line on a T1 interface can operate at either 64 kbps or
56 kbps. Therefore, the number of logical lines that can be created on a CT3
interface in CT3 mode is either M × 1.544 Mbps where M ranges from 1 to 28
or N × 56 kbps or N x 64 kbps where N ranges from 1 to 300.
When a T1 line is working in unframed (T1) mode, the system automatically
creates a serial interface numbered serial number/line-number:0 for it. This
interface operates at 1544 kbps and is logically equivalent to a synchronous serial
interface where you can make other configurations.
When the T1 line is working in framed (CT1) mode, you can bundle timeslots on it.
The system automatically creates a serial interface numbered serial
Use the command...
display controller e3
[ interface-number ]
display interface serial
interface-number
shutdown
undo shutdown
e1 line-number shutdown
undo e1 line-number
shutdown
Remarks
Available in any view
Available in any view
Perform the command in CE3
interface view.
Perform the command in CE3
interface view.
Perform the command in CE3
interface view.
Perform the command in CE3
interface view.