Specifications

Section 520-10S-WI3-203
030-101591 Rev. B
R
2
0806I3RB
S CPE LOS (CPE Loss of Signal)
S ESF (Extended Superframe Format)
S OFR (Office Repeater Mode)
S RPTR (Line Repeater Mode)
S NIU (Network Interface Unit Mode)
S Local Provisioning Capability and LEDs for:
S Operating Mode (OFF RPTR, Line RPTR or NIU)
S CPE − RCV LBO (0 or 7.5dB)
S NET − XMT LBO (0 or 7.5dB)
S Customer Loss of Signal Indication
S Remote Provisioning Capability and LEDs for:
S Repeater Power
S CLOS ID
S ESF Only Code Detection
S Network-side Regeneration
S CPE-side Regeneration
S Loopback Timeout Enable/Disable
S Office Repeater Features
S Span Power Supply 60mA constant current
S Span Power Disable Option
S NET (XMT to NET) Signal Regeneration
S Single or Dual Loopback with Arming
S Office Repeater Loopback 16-bit binary code
S Line Repeater Features
S LOCAL, SPAN or THRU Power Options
S Auto Simplex Loop Closure upon cable open
S Bidirectional Signal Regeneration
S Single or Dual Loopback with Arming
S Repeater Loopback 16-bit binary code
S NIU Features
S LOCAL, SPAN or THRU Power Options
S Auto Simplex Loop Closure upon cable open
S Single or Dual Loopback with Arming
S ESF Only Loopback Recognition Option
S NIU Inband/ESF Data Link Loopback code
S Complies with Bellcore GR-1089
S Complies with UL1459
2. APPLICATIONS
The 520-10SWI3 can be used in several application(s) as de-
scribed in the following paragraphs. The 520-10SWI3 can
operate as an office repeater, a line/extension repeater or as an
NIU. The universal functionality allows craft personnel to
install the unit at the Central Office, in Controlled Environ-
ment Vaults (CEVs) or at the Customer Premises.
2.1 Office Repeater Application
As an office repeater, the 520-10SWI3 is typically installed at
the Central Office or in a CEV. The unit originates DS1 ser-
vices from the Network Service Provider’s Central Office and
generates simplex current (60mA) towards the CPE for power-
ing an NIU or other T1-type of equipment. DS1 signals from
the CPE are regenerated and sent back to the Network Service
Provider (e.g., Fiber Multiplexer). See Figure 2 and Figure 3.
2.2 Line/Extension Repeater Application
As a Repeater, the 520-10SWI3 is able to extend DS1 services
providing bidirectional regeneration of the DS1 signals. The
520-10SWI3 can be installed as a traditional Line Repeater or
Figure 2. Office Repeater Generating Span Power
Fiber
Multiplexer
DSX−1
520−10SWI3
Office Repeater Operation
Span Power Enabled
Power
Supply
520−10SWI3
NIU Operation
Span Powered
CSU
CUSTOMER PREMISESCENTRAL OFFICE
Span
V