Verilink C100 (880-502893-001) Product Manual - Manual (Page 17)

Introduction
06/17/97 C100 and C150 T1/FT1 CSU/DSU 1-5
C150 rear panel The C150 has a DSX-1 connector on the rear panel.
Figure 1-4 C150 rear panel
NI CONSOLE
CONSOLE
IN OUT RS-530/RS-422/RS-232
CI-CUSTOMER INTERFACES DC
DSX-1 V.35 IN