ADTRAN L128T ISDN/Leased Line, Slave def, Master, Leased Line/Channel Rate, 2x64k, 128k def

Chapter 3: Terminal Menu Operation and Structure

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.

38 Express L128/L128T User Manual 61202.070L1-1