Lucent Technologies 555-230-024 Manuale Utente
Networking Solutions
555-230-024
12-14
Issue 5 January 1998
Figure 12-1.
DEFINITY ECS and ISDN
1)
DEFINITY ECS
6)
Private ISDN
2)
DEFINITY ECS
7)
Public ISDN
3)
DEFINITY ECS
8)
Public and Private Networks
4)
Basic Rate Interface Telephone
9)
Central Office Switch
5)
Passive Bus
10)
Tandem Switch
8
8
4
4
4
10
?
2
6
7
3
9
1
5