Specifications

Section 520-10S-WI3-203
030-101591 Rev. B
R
3
0806I3RB
Fiber
Multiplexer
DSX−1
520−10SWI3
Office Repeater Operation
Span Power Disabled
Power
Supply
CSU
CUSTOMER PREMISESCENTRAL OFFICE
Span
520−10SWI3
NIU Operation
Locally Powered
Figure 3. Office Repeater (Non-Powering) & NIU (Locally Powered) Application
Local Power
Figure 4. Office Repeater (Span Powering), Line Repeater (Thru Powering) & NIU (Span Powered) Application
Fiber
Multiplexer
DSX−1
520−10SWI3
Office Repeater Operation
Span Power Enabled
Power
Supply
520−10SWI3
NIU Operation
Span Powered
CSU
CUSTOMER PREMISESCENTRAL OFFICE
CPE
Span
V
NET
Span
Power
Supply
520−10SWI3
Line Repeater Operation
Thru Powered
Figure 5. Office Repeater (Span Powering), Line Repeater (Span Powered) & NIU (Locally Powered) Application
Fiber
Multiplexer
DSX−1
520−10SWI3
Office Repeater Operation
Span Power Enabled
Power
Supply
520−10SWI3
NIU Operation
Locally Powered
CSU
CUSTOMER PREMISESCENTRAL OFFICE
CPE
Span
V
NET
Span
Power
Supply
520−10SWI3
Line Repeater Operation
Span Powered
Local Power
an Extension Repeater. Typically, a Line Repeater is installed
between an Office Repeater and an NIU (see Figure 4 and
Figure 5). An Extension Repeater is installed behind the NIU
(see Figure 6).
2.3 NIU Application
As an NIU, the 520-10SWI3 terminates DS1 services at the Cus-
tomer Premises for maintenance and transmission conditioning.
The 520-10SWI3 is installed to provide the demarcation point
between the Network Service Provider and the Customer Prem-
ises. See Figure 2 through Figure 7.
2.4 Power
Input power options are dependent on the operational mode
of the unit. The 520-10SWI3 has different input power options
when operating as an Office Repeater, as a Line or Extension
Repeater or as an NIU.