Cisco 2431 Software Configuration Guide - Page 41

Configuring T1/E1 Interfaces

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Chapter 3 Configuring with the Command-Line Interface Configuring T1/E1 Interfaces Step 6 Step 7 Step 8 Command or Action Purpose network-clock-select priority {bri|atm|t1|e1} slot/port Selects the controller as a candidate for the clock selection algorithm according to the priority entered. Use either slots 1/0 or 0/0. Example: Router(config)# network-clock-select 1 T1 1/0 network-clock-select priority serial slot/port Example: Router(config)# network-clock-select 1 Serial 0/0 In case of a serial interface, selects the serial controller as a candidate for the clock selection algorithm according to the priority entered. This applies only when the serial interface is used for time-division multiplexing (TDM) connections. exit Exits to global configuration mode. Step 9 Example: Router(config-if)# exit Ctrl-z Example: Router# Returns to enable mode when you finish configuring interfaces. Configuring T1/E1 Interfaces To configure an ISDN PRI, channel-associated signaling (CAS) interface, or a T1/E1 multiflex trunk interface, use the configuration software provided with your Cisco IAD or network module (if any). Otherwise, for greatest power and flexibility, use configuration mode (manual configuration). In this mode, you enter Cisco IOS commands at the prompt. This section covers the following topics: • Configuring Channel Groups on T1/E1 to Support Data • Configuring Channel Groups on T1/E1 to Support Data Under SHDSL Controller • Configuring Digital Voice on T1/E1 • Configuring TDM Cross-Connect Note Before you begin, disconnect all WAN cables from the Cisco IAD to prevent it from running the AutoInstall process. Whenever you power on the Cisco IAD, if there is a WAN connection on both ends and the Cisco IAD does not have a valid configuration file stored in NVRAM (for instance, when you add a new interface), the Cisco IAD tries to run AutoInstall. It can take several minutes for the Cisco IAD to determine that AutoInstall is not connected to a remote TCP/IP host. This section describes basic configuration, including enabling the interface and specifying IP routing. Depending on your own requirements and the protocols that you plan to route, you might need to enter additional configuration commands. Before you begin configuring the interfaces, make sure to do the following: • Connect a console to the Cisco IAD. • Power on the Cisco IAD. OL-4306-03 Cisco IAD2430 Series Integrated Access Devices Software Configuration Guide 3-7

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3-7
Cisco IAD2430 Series Integrated Access Devices Software Configuration Guide
OL-4306-03
Chapter 3
Configuring with the Command-Line Interface
Configuring T1/E1 Interfaces
Configuring T1/E1 Interfaces
To configure an ISDN PRI, channel-associated signaling (CAS) interface, or a T1/E1 multiflex trunk
interface, use the configuration software provided with your Cisco IAD or network module (if any).
Otherwise, for greatest power and flexibility, use configuration mode (manual configuration). In this
mode, you enter Cisco IOS commands at the prompt.
This section covers the following topics:
•
Configuring Channel Groups on T1/E1 to Support Data
•
Configuring Channel Groups on T1/E1 to Support Data Under SHDSL Controller
•
Configuring Digital Voice on T1/E1
•
Configuring TDM Cross-Connect
Note
Before you begin, disconnect all WAN cables from the Cisco IAD to prevent it from running the
AutoInstall process. Whenever you power on the Cisco IAD, if there is a WAN connection on both ends
and the Cisco IAD does not have a valid configuration file stored in NVRAM (for instance, when you
add a new interface), the Cisco IAD tries to run AutoInstall. It can take several minutes for the Cisco
IAD to determine that AutoInstall is not connected to a remote TCP/IP host.
This section describes basic configuration, including enabling the interface and specifying IP routing.
Depending on your own requirements and the protocols that you plan to route, you might need to enter
additional configuration commands.
Before you begin configuring the interfaces, make sure to do the following:
•
Connect a console to the Cisco IAD.
•
Power on the Cisco IAD.
Step 6
network-clock-select
priority
{bri|atm|t1|e1}
slot/port
Example:
Router(config)# network-clock-select 1 T1 1/0
Selects the controller as a candidate for the clock
selection algorithm according to the priority entered. Use
either slots 1/0 or 0/0.
Step 7
network-clock-select
priority
serial
slot/port
Example:
Router(config)# network-clock-select 1 Serial 0/0
In case of a serial interface, selects the serial controller
as a candidate for the clock selection algorithm
according to the priority entered. This applies only when
the serial interface is used for time-division multiplexing
(TDM) connections.
Step 8
exit
Example:
Router(config-if)# exit
Exits to global configuration mode.
Step 9
Ctrl-z
Example:
Router#
Returns to enable mode when you finish configuring
interfaces.
Command or Action
Purpose