Configuring T1 And E1 Interfaces - Cisco MWR 1941-DC User Manual

Cisco MWR 1941-DC Router with the Cisco IOS IP-RAN Feature Set

Configuring T1 and E1 Interfaces

To configure a T1/E1 multiflex trunk interface, enter the following Cisco IOS commands at the router
prompt.
Note Before you begin, disconnect all WAN cables from the router to keep it from trying to run the AutoInstall
process. The router tries to run AutoInstall whenever you power it on if there is a WAN connection on
both ends and the router does not have a valid configuration file stored in NVRAM (for instance, when
you add a new interface). It can take several minutes for the router to determine that AutoInstall is not
connected to a remote Transmission Control Protocol/Internet Protocol (TCP/IP) host.
Configuring T1 Interfaces
To configure the T1 interfaces, use the following commands, beginning in global configuration mode:
Command
Step 1
Router(config)# controller t1 slot/port
Step 2
Router(config-controller)# framing esf
Step 3
Router(config-controller)# linecode b8zs
Step 4
Router(config-controller)# channel-group 0 timeslots
1-24 speed 64
Step 5
Router(config-controller)# cablelength feet
Step 6
Router(config-controller)# exit
Step 7
Router(config)# interface serial slot/port:0
Purpose
Specifies the controller that you want to configure.
For information about interface numbering, see
and Port Numbering" section on page
Specifies the framing type.
Specifies the line code format.
Specifies the channel group and time slots to be
mapped. For the VWIC interfaces, you can configure
two channel-groups (0 and 1) on the first T1 port or
you can configure one channel-group (0 or 1) on each
T1 port. Once you configure a channel group, the
serial interface is automatically created.
The default speed of the channel group is 56.
Note
To get full DS0/DS1 bandwidth, you must
configure a speed of 64.
Configures the cable length.
Although you can specify a cable length from
Note
0 to 450 feet, the hardware only recognizes
two ranges: 0 to 49 and 50 to 450. For
example, entering 35 feet uses the 0 to 49
range. If you later change the cable length to
40 feet, there is no change because 40 is
within the 0 to 49 range. However, if you
change the cable length to 50, the 50 to 450
range is used. The actual number you enter is
stored in the configuration file.
Exits controller configuration mode.
Configures the serial interface. Specify the T1 slot
(always 0), port number, and channel group.
Configuring Tasks
"Slot
9.
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