5-16
PA-MC-T3-EC Port Adapter Installation and Configuration
OL-10589-02
Chapter 5 Configuring the Channelized Mode
Configuring a Channelized T3 Link
Setting the Yellow Alarm Configuration for a T1 Line
You can use the [
no
]
t1
t1-line-number
yellow
{
detection
|
generation
}
command (where
t1-line-number
is 1 to 28) to turn the detection or generation of a yellow alarm on and off. When you
select SF framing, you should consider using the
no
t1-line-number
yellow detection
command to turn
off yellow alarm detection, because the yellow alarm can be incorrectly detected with SF framing.
Setting the Clock Source on a T1 Line
You can set the internal or line (network) clock source for a T1 line with the
t1
t1-line-number
clock
source
{
internal
|
line
} controller command where:
•
t1-line-number
is 1 to 28.
•
internal
selects an internal clock source.
•
line
selects a network clock source.
The default clock source is internal.
Examples follow:
•
Instruct T1 line 1 to use an internal clock source.
The example that follows is for a port adapter in slot 1 of a Cisco 7200 VXR router.
Router(config)#
controller T3 1/0
Router(config-controller)#
t1 1 clock source internal
•
Instruct T1 line 16 to use a line clock source received from the network.
The example that follows is for a port adapter in slot 1 of a Cisco 7200 VXR router.
Router(config)#
controller T3 1/0
Router(config-controller)#
t1 16 clock source line
Note
Normally the T1 link should be configured to use the line clock recovered from the network. In cases
where the network does not provide the clock, such as two PA-MC-T3-EC port adapters connected
back-to-back, one end of the T1 link must be set to internal clock and the other end to line clock.
Setting the FDL Configuration for a T1 Line
To enable and disable one-second transmissions of performance reports through the facility data link
(FDL) (per ANSI T1.403 specification), you must use the
t1
t1-line-number
fdl ansi
command where:
t1-line-number
is 1 to 28 on both ends of the connection.
Note
You can use this command
only
when the T1 framing is ESF.
Use the
no
form of the command to disable remote performance reports.
Setting Loopbacks on a T1 Line
If you have difficulty with the PA-MC-T3-EC configuration or installation, you can troubleshoot the port
adapter using the
loopback
command. Specify loopback for a T1 line using the following
t1
t1-line-number
loopback
[
local
|
network
|
remote
]command where:
t1-line-number
is 1 to 28.