CHAPTER 1 GENERAL INFORMATION

System Outline

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.

Figure 1-2 Physical Interface

PBX

DTI

DTI

Physical Interface

Physical Interface

Max. 30B + D

Max. 30B + D

:D Channel

:B Channel

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.

Figure 1-3 Physical Interface

PBX

DTI

DTI

Physical Interface

Physical Interface

Max. 23B + D

Max. 23B + D

:D Channel

:B Channel

NEAX2000 IVS2 Q-SIG System Manual

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ND-70923 (E), Issue 1.0

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NEC NEAX2000 IVS2 system manual Physical Interface 30DTI, Physical Interface 24DTI