R0106-HP MSR Router Series Interface Configuration Guide(V7)

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Task Command
Display information about E1-F interfaces. display fe1 [ serial interface-number ]
Display the status of an E1-F interface. display interface serial interface-number
Clear statistics for E1-F interfaces. reset counters interface [ serial [ interface-number ] ]
Configuring a T1-F interface
T1-F interfaces, fractional T1 interfaces, are simplified CT1/PRI interfaces. They are a cost-effective
alternative to CT1/PRI interfaces where T1 access does not require multiple channel sets or ISDN PRI.
A T1-F interface has the following features:
• In framed mode, a T1-F interface can bind timeslots into only one channel set. In contrast, a CT1/PRI
interface can group and bundle timeslots randomly into multiple channel sets.
• A T1-F interface does not support PRI mode.
A T1 line is multiplexed from 24 channels. A T1 primary group frame DS1 (digital signal level-1)
comprises 24 DS0 (64 kbps) timeslots and 1 framing bit for synchronization, with each timeslot being 8
bits. Each primary group frame has 193 bits (24 × 8+1). Because DS1 can transmit 8000 frames per
second, its transmission speed is 1544 kbps (193 × 8 kbps).
A T1-F interface can only operate in framed mode. Timeslots 1 through 24 on it can randomly form a
channel set. For the channel set, a synchronous serial interface is created automatically. The interface
rate is n × 64 kbps or n × 56 kbps, where n is the number of bundled timeslots. The synchronous serial
interface 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.
Configuration procedure
To configure a T1-F interface:
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter T1-F interface view.
interface serial interface-number N/A
3. (Optional.) Configure the
interface description.
description text
By default, the description of an
interface is interface-name
Interface.
4. Bundle timeslots on the
interface into a channel set.
ft1 timeslot-list range [ speed { 56k
| 64k } ]
By default, if no timeslot range is
specified, all timeslots are bundled
into one channel set.
The default timeslot speed is 64
kbps, and the default T1-F interface
speed is 1536 kbps.
5. Set the cable length and
attenuation.
ft1 cable { long decibel | short
length }
By default, the long 0db keyword
applies.
6. Set the line code format.
ft1 code { ami | b8zs } The default is B8ZS.
7. Enable or disable user data
inversion.
ft1 data-coding { inverted |
normal }
By default, user data inversion is
disabled.