3Com NBX 100 Administrator's Manual page 253

The dialog box that appears depends on which span list you select, either
the T1 DS1 Modify Span dialog box or the ISDN PRI Modify Span dialog
box.
4 Make the desired changes.
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
Protocol" on page 254
protocol.
Table 49 Span Parameters
Parameter T1 DS1 Options
Span Name Enter as required. Enter as required.
Interface Type N/A
CO Switch N/A
Protocol
Framing Type D4
ESF – Extended
Super Frame
Line Code AMI
B8ZS
Line Length Reflects the
physical line
length.
Timing Mode Loop
Internal
Call-By-Call Service Configuration (4ESS only) ***
Enable N/A
Call-By-Call
Service
Carrier Code N/A
Configuring and Managing T1 Digital Line Cards
Table 43 lists all span parameters for
"Support of AT&T's 4ESS Switch
for details on configuring the NBX system for this
ISDN PRI (T1) Options
*
T1
**
ETSI
AT&T Custom 4ESS
AT&T Custom 5ESS
DMS Custom
National ISDN-NI1/NI2
QSIG slave
**
ESF – Extended Super Frame
F4 – 4 Frame Multiframe
F12 – 12 Frame Multiframe (D4/SF)
**
F72 – 72 Frame Multiframe (SLC96)
** HDB3 *
B8ZS *
**
Reflects the physical line length.
**
N/A
Select this only if your carrier provides,
call-by-call service, you have AT&T Custom -
4ESS as your line protocol, and you want to
change the type of call for each call.
Each long distance carrier has a unique Carrier
Identification Code (CIC). Obtain the code (up
to 4 digits) from your carrier.
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