Lucent Technologies DEFINITY Installation For Adjuncts And Peripherals page 144

DEFINITY ECS Release 8.2
Installation for Adjuncts and Peripherals 555-233-116
9 DS1/T1 CPE Loopback Jack
Loopback Testing with a Smart Jack
1. Span section 1
2. Span section 2
3. Span section 3
4. 120A2 (or later) ICSU
5. RJ-48 to network interface (up to 1000 ft
[305 m])
Figure 35. Network Interface at Extended Demarcation Point (Smart Jack Inaccessible)
6. Loopback jack
7. Dumb block (extended demarcation)
8. Network interface smart jack
9. Interface termination or fiber
multiplexer (MUX)
10. Central office
Issue 1
April 2000
122