Verilink DIU 2130 (880-503297-001) Product Manual - Manual (Page 81)

Verilink 7-1
Appendix
7
DIU/DIM Details
Verilink DSUs have two sides:
• A Network (T1) Side
• An Equipment Side
The equipment side of the DSU is a Data Communication
Equipment (DCE) interface. In a standard configuration, the
equipment connected to the DSU is the Data Terminal Equipment
(DTE) (Figure 7-1).
Figure 7-1 Standard DCE-to-DTE Configuration
The DIU 2130 supports three types of (DTE) interfaces: ITU-T V.35,
RS-449/422, and EIA 530. The RS-449/422, EIA 530, and V.35
interfaces are logically equivalent. The only difference between the
three are their electrical interface characteristics (voltage levels)
and connectors (Figure 7-2).
Interface Cable
DTE Interface DCE Interface
T1 XMT
T1 RCV
Customer DSU
Equipment
(DTE)
(DCE)