Technical Specifications
10-28 Issue 8.0 July 2002
OC-3 to IS-3 Interface Interconnection 10
For intraoffice applications, the OC-3 interface can interwork with another OC-3
interface or an IS-3 interface using multimode fiber.
The IS-3 interface is a Lucent Technologies proprietary interface that operates at
the same rate and format as the OC-3 interface.
Table 10-16 shows the span maximum distances, using dispersion limited fiber,
for OC-3 to OC-3 connections and OC-3 to IS-3 connections.
For details (including LBO values) and ordering information about connecting to a
DDM-2000 IS-3 interface, refer to 365-206-200,
DDM-2000 Multiplexer,
Applications, Planning, and Ordering Guide
.
Transmission Delay 10
The FT-2000 OC-48 Add/Drop-Rings Terminal has the following worst-case
measured one-way transmission delay times:
Table 10-16. Maximum Distances
Fiber (Note) OC-3 to OC-3 OC-3 to IS-3
Bandwidth Connections Connections
1000 MHz-km 6.5 km 3.4 km
800 MHz-km 5.1 km 3.3 km
500 MHz-km 3.1 km 2.7 km
300 MHz-km 1.8 km 1.9 km
Add or Drop DS3 Circuit 8.2 µsec
AddorDropEC-1Circuit 4.0µsec
AddorDropOC-3Circuit 4.5µsec
Add or Drop IS-3 Circuit 4.5 µsec
Add or Drop OC-12 Circuit 4.5 µsec
Through Circuit (OC-48 to OC-48) 5.2 µsec
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