Configuring and Managing T1 Digital Line Cards 211To modify a T1 card name or type:1 On the Digital Line Cards tab, select the board in the T1/ISDN Board List.2 Click Modify.3 To modify the name of the board, enter a new name in the Board Namefield. You can use alphanumeric characters, hyphens, and underscores.The maximum name length is 30 characters.4 To change the type of card, in the Card Type field, select either T1 (for T1DS1 protocol) or ISDN PRI (for T1 ISDN PRI).5 Click OK.Modifying a T1 SpanTo modify a span:1 On the Digital Line Cards tab, select either T1 Span List (for T1 DS1) orISDN PRI Span List (for T1 ISDN PRI) from the Select Device Typedrop-down list and click Apply.2 Select the span you want to modify from the Span List.3 Click Modify.The dialog box that appears depends on which span list you select, eitherthe T1 DS1 Modify Span dialog box or the ISDN PRI Modify Span dialogbox.4 Make the desired changes. Click the Help button in the dialog box fordetailed information about span parameters.The number of channels supported per span depends on theconfiguration of the Digital Line Card. If you configure the T1 Digital LineCard for DS1, it supports 24 channels. If you configure the card for ISDNPRI, it supports 23 channels.5 Click Apply.6 Enable the On Line check box to bring the span online.The span does not come online unless the card is online.7 Click OK to effect the changes.Support of AT&T’s4ESS Switch Protocol4ESS is the AT&T proprietary version of ISDN. You can select the 4ESSprotocol when you configure a T1 Digital Line Card for PRI (Primary RateInterface) operation. If you select the 4ESS protocol, you can optionallyuse Call By Call Service Configuration which enables you to select one ofthree access services:
