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Chapter 6. Configuration Menu
6-4 ISU 512e User Manual 61203086L1-1
ISDN Menu/LDN
The local directory number (LDN) is used when placing or re-
ceiving BONDING calls or when using MPPP with BACP en-
abled. The LDN is the local phone number assigned to the
line. This option allows the entry of up to eight LDNs.
LDNs correspond to the IFC connectors on the rear of the ISU
512e as follows:
IFC #1 LDN 1 (pair with SPID 1) and LDN 2 (pair with SPID 2)
IFC #2 LDN 3 (pair with SPID 3) and LDN 4 (pair with SPID 4)
IFC #3 LDN 5 (pair with SPID 5) and LDN 6 (pair with SPID 6)
IFC #4 LDN 7 (pair with SPID 7) and LDN 8 (pair with SPID 8)
From the front panel, use the up and down arrows to select
the LDN to enter. Press
Enter
to select the LDN and use the
keypad to enter the LDN number. While keying/editing an
LDN, the down arrow allows backspacing through the num-
ber string to correct mistakes. The up arrow scrolls back to the
last digit entered. To cancel a number, use the down arrow to
backspace through the number; then press
Enter
. After enter-
ing each LDN, press
Enter
.
If only one SPID is provided for each line, enter the LDN(s) as
follows:
IFC #1 LDN 1 and LDN 2 (pair with SPID 1)
IFC #2 LDN 3 and LDN 4 (pair with SPID 3)
IFC #3 LDN 5 and LDN 6 (pair with SPID 5)
IFC #4 LDN 7 and LDN 8 (pair with SPID 7)
Dial Line/ExpertISDN
This option allows automatic determination of the SPIDs when the
correct LDNs and area code are entered. The line must be active when
ExpertISDN is started. The progress of ExpertISDN can be viewed in
the Status buffer. The message
E
XP
ISDN P
ASSED
appears when Ex-
pertISDN has determined the SPIDs for each line. See Appendix B
Status Buffer Messages
on page B-1 for additional messages and their
explanations