ADTRAN Express L128, User Manual, Page: 55 / 200

Chapter 3: Terminal Menu Operation and Structure
38 Express L128/L128T User Manual 61202.070L1-1
Dial Line/LDN 1 or 2
Write security: 2; Read security: 5
This option allows the entry of 0, 1, or 2 LDNs. The LDN is used when placing
or receiving calls. The LDN is the local phone number assigned to the line.
LDN 1 = 5 5 5 1 2 1 2
LDN 2 = 5 5 5 1 2 1 3
Disconnect the network interface from the unit before initially entering or altering the
SPIDs and LDNs.
ISDN/Leased Line
Write security: 2; Read security: 5
Leased Line parameters are entered under this menu. Leased mode would be
used for permanent circuits.
Leased Line/Clock Mode
Write security: 2; Read security: 5
The clock mode determines which unit will supply the clock for synchroniza-
tion. If the two units are connected through channel banks, both units should
be configured for Slave mode.
Slave (def) Timing is derived from the master unit.
Master Timing is derived from this unit.
Leased Line/Channel Rate
Write security: 2; Read security: 5
64k Only B1 is used.
2x64k B1 and B2 go to different locations.
128k (def) B1 and B2 are used together.
144k B1, B2 and D are used together.
ISDN/NEBEs
Read security: 5
This contains the number of Near-End-Block-Errors (NEBEs) that have been
detected by the Express L128/L128T’s ISDN circuitry. Continuous errors can
indicate a line problem, but a burst at one time is normal.