NEC NEAX2000 IVS2 Manuale Utente
CHAPTER 1 GENERAL INFORMATION
System Outline
NEAX2000 IVS
2
Q-SIG System Manual
ND-70923 (E), Issue 1.0
Page 5
Physical Interface 30DTI
On the Q-SIG system, a 2 Mbps digital interface is used for the interface trunk.
A D Channel Handler is required for each physical interface. A single data link channel can
control a maximum of 30 B Channels.
A D Channel Handler is required for each physical interface. A single data link channel can
control a maximum of 30 B Channels.
Figure 1-2 Physical Interface
Physical Interface 24DTI
On the Q-SIG system, a 1.544 Mbps digital interface is used for the interface trunk.
A D Channel Handler is required for each physical interface. A single data link channel can
control a maximum of 23 B Channels.
A D Channel Handler is required for each physical interface. A single data link channel can
control a maximum of 23 B Channels.
Figure 1-3 Physical Interface
Physical Interface
: D Channel
: B Channel
: B Channel
DTI
PBX
DTI
Physical Interface
Max. 30B + D
Max. 30B + D
Physical Interface
: D Channel
: B Channel
: B Channel
DTI
PBX
DTI
Physical Interface
Max. 23B + D
Max. 23B + D