3Com Nbx 100 And Ss3 Nbx Administration Guide

Configuring and Managing T1 Digital Line Cards301
Verifying T1 Group Membership (ISDN PRI)
To verify that all channels are in the Member List:
1Return to the Digital Line Cards tab (Figure 113
).
2From the Select Device Type list, select ISDN PRI Group List.
3Click Apply.
4Select the group you want.
5Click Membership. The Manage Group Membership dialog box 
(Figure 122
) appears.
Figure 122   Manage Group Membership Dialog Box
6Scroll through the Member List to verify that all 23 channels are present....

302CHAPTER 3: DEVICE CONFIGURATION
Completing the T1 Configuration (ISDN PRI)
To complete the T1 ISDN PRI installation:
1Return to the Digital Line Cards tab.
2From the Select Device Type list, select ISDN PRI 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...

Configuring and Managing T1 Digital Line Cards303
Modifying a T1 CardThese sections describes how to modify a T1 card that is already installed 
in the system.
■Modifying the T1 Card Name or Type
■Modifying a T1 Span
■Configuring Partial T1 Lines
■Modifying Audio Controls
Modifying the T1 Card Name or Type
You can change the name of a Digital Line Card at any time. You can also 
set the type to T1 or ISDN PRI.
To modify a T1 card name or type:
1In the NBX NetSet - Main Menu window, click Device...

304CHAPTER 3: DEVICE CONFIGURATION
Figure 124   Digital Line Cards Tab
3Select the board in the T1/ISDN Board List.
4Click Modify. The Modify Board dialog box (Figure 125
) appears.
Figure 125   Modify Board Dialog Box 

Configuring and Managing T1 Digital Line Cards305
5To modify the name of the board, enter a new name in the Board Name 
field. You can use alphanumeric characters, dashes, and underscores. The 
maximum name length is 30 characters.
6To change the type of card, in the Card Type field, select either T1 (for T1 
DS1 protocol) or ISDN PRI (for T1 ISDN PRI).
7Click OK.
Modifying a T1 Span
To  m o d i f y  a  s p a n :
1Return to the Digital Line Cards tab.
2From the Select Device Type pull-down list, select...

306CHAPTER 3: DEVICE CONFIGURATION
Figure 127     Modify Span Dialog Box — ISDN PRI
6Make the desired changes. Table 43 lists all span parameters for 
reference. The number of channels supported per span depends on the 
configuration of the Digital Line Card. If you configure the T1 Digital Line 
Card for DS1, it supports 24 channels. If you configure the card for ISDN 
PRI, it supports 23 channels. See “Support of AT&T’s 4ESS Switch 
Protocol” later in this section for details on configuring the NBX...

Configuring and Managing T1 Digital Line Cards307
7Click Apply.
8Enable the On Line check box to bring the span online.
The span does not come online unless the card is online.
9Click OK to effect the changes.
Line LengthReflects the 
physical line 
length.
**
Reflects the physical line length.*
Timing ModeLoop
InternalN/A
Call-By-Call Service Configuration (4ESS only) ***
Enable 
Call-By-Call 
ServiceN/ASelect this only if your carrier provides, 
call-by-call service, you have AT&T Custom - 
4ESS as...

308CHAPTER 3: DEVICE CONFIGURATION
Support of AT&T’s
4ESS Switch ProtocolYou can select AT&T’s 4ESS switch protocol when you configure a T1 
Digital Line Card for PRI (Primary Rate Interface) operation. If you select 
the 4ESS protocol, you can optionally use Call By Call Service 
Configuration which enables you to select one of three access services:
■Long Distance — The default service if the customer selects the 4ESS 
protocol, but purchases no other services. Long Distance can be used 
with SDN but...

Configuring and Managing T1 Digital Line Cards309
Figure 128   ISDN PRI Span List Dialog Box
5From the CO Switch Protocol pull-down list, select AT&T Custom - 4ESS.
6Click OK to enable the 4ESS protocol and exit from the dialog box. 
Otherwise click Apply to enable 4ESS, stay in the Modify Span dialog box, 
and configure Call-By-Call Service. See “Configuring Call-By-Call Service”
 
in the next section.
Configuring Call-By-Call Service
You order the optional Call-By-Call Service from your long-distance...

310CHAPTER 3: DEVICE CONFIGURATION
(Current Feature Group B (950-XXXX) CIC Assignments and Current 
Feature Group D (101-XXXX) CIC Assignments). Search through the 
documents to determine the identification code for your long-distance 
carrier. For example, AT&T is listed next to code 288 in the Group D 
document.
3From the Default Outbound Service pull-down list, select either 
MEGACOM or Standard (LDS) as the service to use as the default. You 
can configure the NBX system dial plan to use a particular...