
248 Chapter 7 • Configuring and Backing Up Permanent Connections
Table 7.4 Sample Cause Codes
Cause Code (Hex) Description
00 DTE originated
01 Number Busy
05 Network Congestion
Diagnostic Code Description
26 Packet too short
27 Packet too long
Frame Relay Connections
Over the past three to five years, Frame Relay has been the wide area ser-
vice of choice. It provides an efficient, low-cost communication technology.
There are two types of Frame Relay connections: User-Network
Interface (UNI), and Network-to-Network Interface (NNI). UNI defines the
signaling between the end-user network device and the Frame Relay
switch. NNI defines the signaling between the trunks ...