Patton electronic SmartNode 4110 Series manual 215

SmartWare Software Configuration Guide 18 • ISDN Overview

Basic Rate Access Line point-to-point
		S	T	T	U
TE			NT2	Node	NT1	LT
Phone			PBX		IP Network
						LE
Basic Rate Access point-to-multipoint (S-bus)
						Local Exchange
TE	TE	S/T	S/T		U
Phones			Node	NT1		LT
					IP Network
Primary Rate Access Line
		S		T		V
TE			NT2	Node	IP Network	Node
Phone			PBX

Legend:
TE	Terminal Equipment (Phone)		LE	Local Exchange
NT1	Network Termination 1	(Modem)	LT	Line Termination
NT2	Network Termination 2	(PBX)	ET	Exchange Termination

ET

ET

ET

Figure 33. Integration of ISDN access lines

IMPORTANT

IMPORTANT

Port activation deactivation—ISDN ports can be config- ured while they are active. However they will be internally dis- abled to modify the configuration and then re-enabled. All active calls on the port are dropped during this process. Configuration changes should only be performed during planned down times.

Reference clock source and synchronization—The SmartNode uses a single reference clock source for the synchro- nization of the 64kbit/s PCM channels on the ISDN ports and in the CS context. This reference clock source can be internal or it can be derived from one of the ISDN ports. If the clock reference is not configured in accordance with the network environment, clock slips and related voice quality degradations can occur. Refer to chapter 31, “CS context overview” on page 339 on how to configure the reference clock

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