E1-F Interface; Overview; Configuring An E1-F Interface (In Framed Mode); Configuring An E1-F Interface (In Unframed Mode) - 3Com MSR 50 Series Configuration Manual

E1-F Interface

Overview

Configuring an E1-F
Interface (in Framed
Mode)
Configuring an E1-F
Interface (in Unframed
Mode)
E1-F interfaces, fractional E1 interfaces, are simplified CE1/PRI interfaces. They are
a cost-effective alternative to CE1/PRI interfaces where E1 access does not need
multiple channel sets or ISDN PRI.
Compared with a CE1/PRI interface, an E1-F interface delivers these features:
In framed mode, it can only bind timeslots into one channel set, while a
■
CE1/PRI interface can group and bundle timeslots randomly into multiple
channel sets.
It does not support PRI mode.
■
An E1-F interface can work in both framed (the default) and unframed modes.
When the E1-F interface is working in unframed mode, it is a non-timeslot
interface with 2048 kbps of data bandwidth. It is logically equivalent to a
synchronous serial interface where you may configure PPP, HDLC, FR, LAPB or X.25
at the link layer and IP or IPX at the network layer.
When the E1-F interface is working in framed mode, it is physically divided into 32
timeslots numbered 0 through 31. Except timeslot 0 used for transmitting
synchronization information, all other timeslots can randomly form one channel
set. The rate of the interface is thus n × 64 kbps and its logical features are the
same as those of a synchronous serial interface where you can configure PPP, FR,
LAPB and X.25 at the data link layer and IP or IPX at the network layer.
Follow these steps to configure an E1-F interface in framed mode:
To do...
Enter system view
Enter E1-F interface view
Set the interface to operate in
framed mode
Bundle timeslots on the
interface
Set other interface parameters See
Follow these steps to configure an E1-F interface in unframed mode:
To do...
Enter system view
Enter E1-F interface view
Use the command...
system-view
interface serial
interface-number
undo fe1 unframed
fe1 timeslot-list range
"Configuring Other E1-F
Interface Parameters" on
page 116.
Use the command...
system-view
interface serial
interface-number
E1-F Interface 115
Remarks
--
Required
Optional
The default is framed mode.
Optional
If no timeslot range is
specified, all timeslots are
bundled by default.
Optional
Remarks
--
Required