REGLAMENTO GENERAL DE LA LEY ORGÁNICA DEL SISTEMA

Digital Line Cards

These sections describe how to add and configure a T1 Digital Line Card to connect to a T1 service provided by the local telephone company:

■ Adding a T1 Digital Line Card

■ Configuring a T1 Digital Line Card for the DS1 Protocol ■ Configuring a T1 Digital Line Card for ISDN PRI Signaling ■ T1 Card Status Lights

■ Modifying a T1 Card ■ Modifying a T1 Group ■ Modifying T1 Card Channels ■ Modifying IP Settings for a T1 Card ■ Removing a T1 Digital Line Card

The NBX NetSet utility refers to Digital Line Cards as cards or boards. 3C10116D T1 Digital Line Cards have expanded capabilities that are described in these topics:

■ Setting Up a Digital Line Card at a Remote Location ■ Setting Up T1/E1 Logging

■ Viewing CSU State Information and Statistics ■ Using Loopback Tests

You can configure the T1 Digital Line Card to use one of two types of signaling:

■ ISDN PRI (Primary Rate Interface) signaling

By default, the Auto Discovery process selects DS1 as the signaling type for a T1 Digital Line Card.

The system provides E911 (emergency) connectivity if the T1 Digital Line Card is configured for ISDN PRI (Primary Rate Interface) signaling. The system provides the calling number (ANI) so that the emergency services personnel can determine the location of the caller from the E911 database. You must update the CO (PSAP) databases.

Adding a T1 Digital Line Card

Adding a T1 Digital Line Card to a system requires these procedures:

■ Preparing the NBX System for T1 Cards

■ Ordering DID (Direct Inward Dialing) Services for T1 ■ Enabling Auto Discovery for Digital Line Cards ■ Inserting the T1 Digital Line Card

Preparing the NBX System for T1 Cards

Before you insert the T1 Digital Line Card into the chassis, order a T1 line from your telephone carrier and have them install the line. In some cases, the telephone company offers T1 services only with specific, pre-defined parameters. However, some telephone companies offer a number of configuration choices with their T1 services.

Ordering DID (Direct Inward Dialing) Services for T1

When you order a T1 line with DID capability (Direct Inward Dial), the local telephone carrier assigns a block of telephone numbers to you. Usually, you can request a specific range of numbers, but sometimes the carrier assigns numbers other than the ones you request.

You may be able to request that the local telephone carrier pass you a specific number of digits for each incoming telephone call. Sometimes the carrier does not offer any choice. In either situation, you need to know how many digits the carrier passes.

Example: Carriers commonly pass either the last three digits or last four digits of the number for each incoming call.

Sometimes the last digits of the telephone numbers that the carrier assigns to you do not match the telephone extension numbers that you

Configuring and Managing T1 Digital Line Cards 199

want to use for internal calls. You can create entries in your Dial Plan configuration file to translate the incoming numbers into the

corresponding extension numbers.

Example: You want to use internal extensions from 4000 through 4999, but the local telephone carrier assigns you numbers from 617-555-3500 through 617-555-4499. You can create translator entries in the Dial Plan configuration file to translate an incoming digit sequence such as 3795 into extension number 4295, and a sequence such as 4213 into 4713. The configuration requires several translator entries to handle subsets of the total range. A unique set of entries handles incoming digit sequences from 3500 through 3599, from 3600 through 3699, and each of the other sequences in which the first two digits are unique in the range from 37XX through 44XX.

If the DDI/DID numbers match your internal extension numbers, the translator entries in your Dial Plan configuration file can be much simpler. Example: You plan to use internal extensions from 100 through 299, and the local telephone company assigns you numbers from

617-555-4100 through 617-555-4299. If the local telephone carrier passes you three digits, you need no translator entries in the Dial Plan configuration file. If the carrier passes you four digits, you could add a single set of translator entries to the configuration file to remove the first digit (4) and use the remaining three digits as the internal extension. Enabling Auto Discovery for Digital Line Cards

To enable Auto Discovery for Digital Line Cards:

1 Select NBX NetSet > System Configuration > System Settings > System-wide.

2 Click the Auto Discover Digital Line Cards check box (may already be selected).

Other check boxes may be selected based on previous Auto Discoveries. You do not need to clear these check boxes to install the T1 Digital Line Card. However, it is good practice to clear all check boxes other than the one that you want to select so that the Call Processor does not continue to search for added devices.

Inserting the T1 Digital Line Card To insert the T1 card:

1 Find the MAC address of the T1 card on the label on the card. 2 Record the MAC address for the configuration process.

3 Select a slot for the T1 card in the chassis and use a Phillips screwdriver to remove the blank faceplate from the slot.

4 Insert the T1 card into the slot.

5 Slide the T1 card into the chassis until you feel it touch the connectors. 6 To seat the T1 card into the connectors, apply firm pressure to both the

left and right sides of the front of the card.

7 Tighten the left and right screws on the front of the T1 card to secure it to the chassis.

CAUTION: Wait 3 minutes for the T1 card to initialize and for the system to update its database. The T1 card reboots twice during the initialization process. If you attach a console cable to the COM1 port on the T1 card and use Hyperterm software to view the text output from the card, you see status messages associated with the two reboot processes. See

“Connecting a Computer to a Serial Port” on page 386.

Another way that you can be sure that it is safe to proceed is to examine the status lights on the front panel of the T1 card. After the Auto Discovery process has completed, and before you connect the T1 Digital Line Card to the telephone company’s T1 line, the CF (Carrier Fail) light should appear solid green on a 3C10116C card. On a 3C10116D card, the POST, DNLD, CARD and NCP lights should appear solid green. For more information on T1 card status lights, see “T1 Card Status Lights” on

page 208.

You are now ready to configure the T1 Digital Line Card for either DS1 signaling or ISDN PRI signaling. Before you configure a T1 card, be sure you have configured the system Dial Plan for you needs as described in Chapter 2.

Configuring a T1 Digital Line Card for the DS1 Protocol

These sections tell you how to use the NBX NetSet utility to set up your T1 Digital Line Card for DS1 protocol:

■ T1 DS1 Configuration ■ Configuring T1 Groups (DS1)