Verilink C100 (880-502893-001) Product Manual - Manual (Page 68)

Configuring the C100/C150 Using the Console Port
6-6 Verilink C100 and C150 T1/FT1 CSU/DSU 6/15/99
Programming the customer interface
C150 DSX-1 IN OR OUT
This choice is used to enable or disable the DSX-1 interface. With
disable selected, the DSX-1 interface is completely disabled and all
three LEDS (TX, RX and LOCK) associated with the DSX-1 interface
will not light. When there is no DSX-1 interface, the DSX-1 must be
disabled for proper operation of the unit. When a DSX-1 input is used,
this selection must be enabled.
DSX-1 FRAMING
The type of DSX-1 framing is determined by this field. With ESF
selected, the unit will generate and expect ESF framing to and from the
DSX-1 interface. With D4 selected, the unit will generate and expect D4
framing. The framing selected on the DSX-1 interface does not have to
match the framing on the Network Interface. The T-1 CSU/DSU can be
used to connect an ESF T-1 facility to a PBX which only supports D4.
DSX-1 coding
This field selects the type of coding the unit will generate. The B8ZS
selection makes the unit generate B8ZS encoding and in the AMI
selection causes the unit to generate AMI (Alternate Mark Inversion)
encoding. This coding selection, must match the Customer Equipment
connected to the DSX-1 interface otherwise intermittent errors can
occur.
DSX-1 line length/build out
This selection controls the output power of the T-1 driver on the DSX-1
interface. The driver on the DSX-1 interface can support both short
haul (PBXs up to 655 feet) and long haul (other T-1 CSUs up to 6000
feet) applications. When the DSX-1 interface is connected to customer
equipment with short haul interfaces, the selections that should be
used are 133, 266, 399, 533 or 655 feet depending on distance. When the
DSX-1 interface is connected to another T-1 CSU/DSU up to 6000 feet
away, the selections that should be used are the standard 0, -7.5, -15 or
-22.5. The typical selection is 133 feet/0 dB.