3Com S330 manual CBR Structured DS1 Drop and Insert

CBR Module 233

Structured DS1 Implement the structured service if you require DS0 midspan drop-and-insert. (See Figure 170.)

Figure 170 CBR Structured DS1 - Drop and Insert

ABC

DS0 = 5	DS0 DS1	DS0 = 5 VP0/VC35	ATM Network
		Structured CBR traffic
			DS0 = 5
Channel		PathBuilder S330/S310
Bank

AChannel bank converts analog to T1; putting channel on DS0 5.

BPathBuilder S330/S310 puts DS0 5 on virtual circuit (VP0/VC35) and passes structured CBR traffic through to the ATM network.

CATM network continues to carry CBR traffic on to another ATM network or drops the traffic (on DS0 5) to a public switched telephone network.

Public Switched

Telephone

Network

Midspan drop and insert allows services such as public switched telephone service to be inserted into the ATM link. Combining this service with Ethernet bridge service will provide you with a complete integrated communications access solution, as shown in Figure 171.

Figure 171 Integrated PathBuilder S330/S310 Application

PBX or Key	Public Switched	PBX or Key
System	Telephone	System
	Network

Drop

DS0 = 6

DS0 = 1-6

Voice

ATM Network

LAN

Data

Ethernet	Ethernet
LAN	LAN