![](https://pdfstore-manualsonline.prod.a.ki/pdfasset/d/b3/db31c5b0-6723-4461-b36f-07bd651d446d/db31c5b0-6723-4461-b36f-07bd651d446d-bg37.png)
Detailed Interface Concepts
Avaya X330WAN User’s Guide 33
Figure 4.1 T1 Port with PPP Encapsulation
Figure 4.2 illustrates an E1/T1 port Channel Group. All data from the Channel
Group is encapsulated using Frame Relay protocol, and is sent via a Frame Relay
Serial interface and Sub-interfaces over the multiple IP interfaces defined using
DLCI (Data Link Connection Identifier).
Figure 4.2 E1/T1 Port with Frame Relay Encapsulation
Figure 4.3 illustrates a USP port. All data from the USP port is encapsulated using
Frame Relay protocol, and is sent via a Frame Relay Serial interface and
Sub-interfaces over the single IP interfaces defined using DLCI.
Figure 4.3 USP Port with Frame Relay Encapsulation
Figure 4.4 illustrates a USP port. All data from the USP port is encapsulated using
PPP protocol, and is sent via a Serial interface over the multiple IP interfaces
defined.