3.10 Install the BRI to PRI to Back up the T1
OVERVIEW
The T1 facility can have a back up connection established when the T1 connection is
unavailable. In order to back up the T1, a BRI is used at the remote site. One
B-channel is used as a 64K backup channel when the T1 connectivity is lost. It does
not provide the same throughput as a 1.544K T1 but allows for maintenance activities
to take place. The BRI at remote site is a purchased by the customer. It must be a
National ISDN BRI with CSD 64KB Clear capabilities on B-channel 1, a 10-digit CSD
DN, and a SPID.
Purpose
Use this procedure to set up the BRI to PRI backup for the T1.
When to Use
The following procedure is used to provide a backup mechanism for the network when
the T1 is not accessible.
To create a T1 backup for the network, each of the up to 15 BRIs and one PRI need to
be configured. In this configuration, the PRI is located at the 5ESS
®
switch site and
the BRI is located at each DRM site.
Before You Begin
The following factors must be considered before you begin the procedure:
Required Conditions
The following conditions should exist before the procedure is performed:
• Verify that the router is connected to the network.
• Verify that a terminal (laptop computer or VT100 terminal) is connected to the
network.
PROCEDURE
3.10.1 Install the PRI at the Host Site
1. t the Host Site, Connect Router 00 to Port 301 and the MDF.
3.10.1.1 Assign Trunk type as T1 PRI
1. Enter 3 for configuration.
Response: The Configuration Commands menu is displayed.
2. Enter 2 for port.
Response: The Configure Port menu is displayed.
3. Enter 300 for PRI.
Response: The T1 Trunk Parameters menu is displayed.
4. Enter 1.
5. Enter the following information: (Use the arrow keys to navigate the screen.)
• At Trunk Type, enter T1 PRI. (Use return key to change.)
235-200-150
January 2003
NETWORK PROCEDURES
Procedure 3.10
Issue 3.00 Page 3.10-1
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