Displaying and maintaining CT1/PRI interfaces
Execute display commands in any view and reset commands in user view.
Task Command
Display information about CT1/PRI interfaces.
display controller t1 [ interface-number ]
Display information about a channel set or PRI set.
display interface serial
interface-number:set-number
Clear statistics for CE1/PRI interfaces. reset counters controller t1 [ interface-number ]
Configuring an E1-F interface
E1-F interfaces, which are fractional E1 interfaces, are simplified CE1/PRI interfaces. They are a
cost-effective alternative to CE1/PRI interfaces where E1 access does not require multiple channel sets or
ISDN PRI.
An E1-F interface has these features:
• In framed mode, an E1-F interface can bind timeslots into only one channel set. In contrast, a
CE1/PRI interface can group and bundle timeslots randomly into multiple channel sets.
• An E1-F interface does not support PRI mode.
• An E1-F interface can operate in either framed (the default) or unframed mode.
{ In unframed mode, an E1-F interface provides 2048 kbps of data bandwidth. For the interface,
a synchronous serial interface is created automatically.
{ In framed mode, an E1-F interface is physically divided into 32 timeslots numbered 0 through 31.
Timeslot 0 is used for transmitting synchronization information. All other timeslots can randomly
form one channel set. For the channel set, a synchronous serial interface is created automatically.
The interface rate is n × 64 kbps, where n is the number of bundled timeslots.
{ The synchronous serial interface created in either mode has the same logical features as a
standard synchronous serial interface. You can configure this interface in the same way you
configure a standard synchronous serial interface.
Configuring an E1-F interface in framed mode
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter E1-F interface view.
interface serial interface-number N/A
3. Configure the interface to
operate in framed mode.
undo fe1 unframed The default is framed mode.
4. Bundle timeslots on the
interface.
fe1 timeslot-list range
By default, if no timeslot range is
specified, all timeslots are
bundled.
5. Set the framing format.
fe1 frame-format { crc4 | no-crc4 }