R2511-HP MSR Router Series Interface Configuration Guide(V5)

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Task Command Remarks
Clear the controller counter for a
CE1/PRI interface.
reset counters controller t1 interface-number Available in user view.
Configuring an E1-F interface
Overview
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 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, but 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 operate in either framed (the default) or unframed mode.
When an E1-F interface is operating 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 at the network layer.
When an E1-F interface is operating 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 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.
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
Optional.
The default is framed mode.
4. Bundle timeslots on the
interface.
fe1 timeslot-list range
Optional.
If no timeslot range is specified, all
timeslots are bundled by default.
5. Enable RAI detection on the
interface.
fe1 alarm detect rai
Optional.
Enabled by default.
6. Set other interface
parameters.
See "Configuring other E1-F
interface parameters."
Optional.