Displaying And Maintaining T1-F Interfaces; Ce3 Interface; Overview; Configuring A Ce3 Interface (In E3 Mode) - 3Com MSR 50 Series Configuration Manual

Displaying and
Maintaining T1-F
Interfaces

CE3 Interface

Overview

Configuring a CE3
Interface (in E3 Mode)
Follow these steps to start/stop a BERT test on a T1-F interface:
To do...
Enter system view
Enter CT1/PRI interface view
Start a BERT test
To do...
Display information about a
specified or all T1-F interfaces
Display the operating state of a
specified T1-F interface
Like E1, E3 also belongs to the digital carrier system of ITU-T. It transmits data at
34.368 Mbps and adopts HDB3 as the line code format.
A CE3 interface can work in either E3 or CE3 (the default) mode.
A CE3 interface in E3 mode equals an interface with 34.368 Mbps data
■
bandwidth, on which, no timeslots are divided.
A CE3 interface in CE3 mode can demultiplex 16 channels of E1 signals in
■
compliance with ITU-T G.751 and G.742. Each E1 line can be divided into 32
timeslots numbered 0 to 31, of which timeslots 1 through 31 can be randomly
bundled into N × 64 kbps logical channels. (Timeslot 0 for framing signal
transmission must not participate in bundling operation.) Therefore, CE3 can
be channelized into E1 lines or CE1 lines.
When an E1 line is working in unframed (E1) mode, the system automatically
creates a serial interface numbered serial number/line-number:0 for it. This
interface operates at 2048 kbps and is logically equivalent to a synchronous serial
interface where you can make other configurations.
When the E1 line is working in framed (CE1) mode, you can bundle timeslots on it.
The system automatically creates a serial interface numbered serial
number/line-number:set-number for it. This interface operates at N × 64 kbps and
is logically equivalent to a synchronous serial interface where you can make other
configurations.
CE3 interfaces support link layer protocols PPP, HDLC, FR, LAPB, and X.25 and
network protocols IP and IPX.
Follow these steps to configure a CE3 interface operating in E3 mode:
To do...
Enter system view
Use the command...
system-view
interface serial interface-number
ft1 bert pattern { 2^20 | 2^15 } time
minutes [ unframed ]
Use the command...
display ft1 [ serial serial-number ]
display interface serial
serial-number
Use the command...
system-view
CE3 Interface 119
Remarks
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--
Required
Remarks
Available in any
view
Available in any
view
Remarks
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