3Com Nbx 100 And Ss3 Nbx Administration Guide

Configuring and Managing T1 Digital Line Cards291
Connecting the T1 Line and Activating the Span
To connect the T1 line and activate the span:
1Plug the T1 line into the T1 Digital Line Card.
2Return to the Digital Line Cards tab (Figure 113
).
3From the Select Device Type list, select T1/ISDN Board List.
4Click Apply.
5From the list, select the new T1 Digital Line Card. Use the MAC address of 
the T1 Digital Line Card to identify the card in the list. You recorded the 
MAC address before inserting the...

292CHAPTER 3: DEVICE CONFIGURATION
4From the T1 Group List, select Group 1.
5Click Modify. The Modify Group dialog box (Figure 115
) appears.
Figure 115   Modify Group Dialog Box — T1
The fields in the Modify Group dialog box contain default values. No 
default values are assumed for Called Party Digits or Calling Party Digits.
6Modify the Wink Wait value:
aSelect Wink Wait from Time Values list.
bType 3000 in the New Value text box.
cClick Apply.
dAsk your telephone service provider to set their Wink...

Configuring and Managing T1 Digital Line Cards293
8Click the On Line check box.
9Enter 500 in each of the four AutoExt text boxes.
10Click OK.
The NBX system now begins to create the group. If you connect the 
telephone company’s T1 line to the T1 Digital Line Card, or if you connect 
a loopback cable to the T1 card, the Nominal light turns on.
Verifying T1 Group Membership (DS1)
To verify that all channels are in the Member List of a T1 Digital Line Card:
1Return to the Digital Line Cards tab (Figure...

294CHAPTER 3: DEVICE CONFIGURATION
Completing the T1 Configuration (DS1)
To complete the T1 installation:
1Return to the Digital Line Cards tab (Figure 113
).
2From the Select Device Type list, select T1 Channel List.
3Click Apply.
4Wait approximately 30 seconds for the status of each channel to change 
from Ready to Idle.
While you are waiting, you may click Apply to refresh the list of channels 
and to see the updated status. If you have connected the Telephone 
company’s T1 line to the T1 Digital Line...

Configuring and Managing T1 Digital Line Cards295
3From the Select Device Type pull-down list, select T1 Span List.
4Click Apply.
5Select the span for which you want to set echo cancellation.
6Click the Audio Controls button. See Figure 117
.
Figure 117     Audio Controls for a T1 Digital Line Card
7Enable the Echo Canceller Enabled check box to turn on echo 
cancellation.
8Click OK. 

296CHAPTER 3: DEVICE CONFIGURATION
Configuring a T1
Digital Line Card for
ISDN PRI SignalingThese sections tell you how to use the NBX NetSet utility to set up your T1 
Digital Line Card for ISDN PRI signaling:
■T1 ISDN PRI Configuration
■Configuring T1 Groups (ISDN PRI)
■Verifying T1 Group Membership (ISDN PRI)
■Completing the T1 Configuration (ISDN PRI)
Before you configure a T1 Digital Line Card for ISDN PRI (Primary Rate 
Interface) signaling, read the cautionary note.
CAUTION: Wait 3 minutes for the...

Configuring and Managing T1 Digital Line Cards297
Figure 118   Modify Board Dialog Box — T1 ISDN PRI
5To change the name of the T1 Digital Line Card, enter a new name in the 
Board Name field. You can use alphanumeric characters, dashes, and 
underscores. The maximum name length is 30 characters.
6From the Card Type pull-down list, select ISDN PRI.
7Click OK. The Digital Line Cards tab (Figure 113
) reappears.
8Wait until the entry for this Digital Line Card in the Ty p e column changes 
to PRI. To see...

298CHAPTER 3: DEVICE CONFIGURATION
Figure 119   ISDN PRI Channel List Dialog Box — T1 ISDN PRI
11Verify that the highest channel in the Chan column is 23.
When you configure a T1 Digital Line Card for ISDN PRI signaling, one of 
the 24 channels is allocated for signaling, leaving 23 for data (voice).
Connecting the T1 Line and Activating the Span
To connect the T1 line and activate the span:
1Plug the T1 line into the T1 Digital Line Card.
2Return to the Digital Line Cards tab (Figure 113
).
3From the...

Configuring and Managing T1 Digital Line Cards299
6Click Modify. The Modify Board dialog box (Figure 120) appears.
Figure 120   Modify Board — T1 ISDN PRI
7Click the On Line check box.
8Click OK.
9In the T1/ISDN Board List, verify that the entry for this card in the Status 
column changes from Offline to Online. You may need to wait a minute 
or two, and then refresh your browser window to see this change.
Verifying the Change in Span Status
To verify that the Span status changes from Offline to Ready:...

300CHAPTER 3: DEVICE CONFIGURATION
Configuring T1 Groups (ISDN PRI)
To configure a T1 ISDN PRI Group:
1Return to the Digital Line Cards tab (Figure 113
).
2From the Select Device Type list, select ISDN PRI Group List.
3Click Apply.
4From the ISDN PRI Group List, select PRI Group 1.
5Click Modify. The Modify Group — T1 ISDN PRI dialog box (Figure 121
) 
appears.
Figure 121   Modify Group Dialog Box — T1 ISDN PRI
6To modify the name of the group, enter a new name in the Group Name 
field. You can use...