3Com 3C63311 Reference Guide - Page 245

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 A B C DS0 = 5 DS0 DS1 DS0 = 5 VP0/VC35 Structured CBR traffic ATM Network Channel Bank PathBuilder S330/S310 DS0 = 5 A Channel bank converts analog to T1; putting channel on DS0 5. Public Switched Telephone Network B PathBuilder S330/S310 puts DS0 5 on virtual circuit (VP0/VC35) and passes structured CBR traffic through to the ATM network. C ATM network continues to carry CBR traffic on to another ATM network or drops the traffic (on DS0 5) to a 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 System Drop DS0 = 6 Public Switched Telephone Network DS0 = 1-6 Voice LAN Data ATM Network PBX or Key System Ethernet LAN Ethernet LAN