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C H A P T E R 2
Channelized T3 Digital Feature Card
Revised: August 4, 2008, OL-16081-01
This chapter describes the channelized T3 (CT3) feature card and includes the following sections:
•Overview, page 2-1
•Online Insertion and Removal of the CT3 Digital Feature Card, page 2-2
•Getting Help, page 2-6
•Where to Go Next, page 2-6
Overview
The CT3 digital feature card provides physical line termination for a channelized T3 ingress trunk line. It uses an onboard multiplexer to multiplex 28 channelized T1 lines into a single channelized T3 line. (See Figure 2-1.)
Figure 2-1 CT3 Digital Feature Card
Note The Cisco VGD 1T3 Voice Gateway supports only one type of WAN feature card at a time. See Chapter 4, “Troubleshooting,” for more information.
The CT3 digital feature card provides physical line termination for up to 672 DS0 channels and uses onboard High-Level Data Link Control (HDLC) controllers to terminate digital (ISDN) calls.
You can use the bantam jack ports on the feature card to monitor a T1 line or to test any of the individual T1 channels in drop and insert mode.
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Chapter 2 Channelized T3 Digital Feature Card
Online Insertion and Removal of the CT3 Digital Feature Card
You can install a CT3 digital feature card in any feature card slot in a Cisco VGD 1T3 Voice Gateway chassis.
Online Insertion and Removal of the CT3 Digital Feature Card
To remove a feature card without dropping any calls or connections, you will need to take the feature card out of service by using the busyout command to disable the feature card. The busyout command is executed on a per-feature card basis and will disable the card after waiting for the active services to terminate.
If there are active calls on the feature card after you execute the busyout command, wait for the calls to drop. To view the status of the termination process, use the show busyout command.
Caution The online installation and removal (OIR) of new cards should be done only during times of low CPU utilization, such as during maintenance.
Caution To avoid erroneous failure messages, remove or insert only one feature card at a time.
When you replace a feature card in a slot with a new feature card of the same type, the system software recognizes the new feature card and brings up the trunk interfaces automatically.
If you replace the existing feature card with a new feature card of a different type, you must reconfigure the system. For configuration details, see the Cisco VGD 1T3 Voice Gateways Software Configuration Guide.
Removing the CT3 Digital Feature Card
To remove the CT3 digital feature card, follow these steps.
Step 1 Determine which slot the feature card is in (see Figure 2-2) by entering the show chassis slot command in privileged EXEC mode:
Router# show chassis slot
Note These commands are not valid for slot 0. Slot 0 is the motherboard.
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