Figure 4.1, T1 port with ppp encapsulation, Figure 4.2 – Avaya X330WAN User Manual
Page 55: E1/t1 port with frame relay encapsulation, Figure 4.3, Usp port with frame relay encapsulation

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.