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Table 79. ISDN Q.931 Cause Codes (continued)
Code Cause
82 Identified channel does not exist
83 A suspended call exists, but this call identity does not
84 Call identity in use
85 No call suspended
86 Call having the requested call identity has been cleared
88 Incompatible destination
91 Invalid transit network selection
95 Invalid message, unspecified
96 Mandatory information element is missing
97 Message type nonexistent or not implemented
98 Message not compatible with call state or message type nonexistent or not
implemented
99 Information element nonexistent or not implemented
100 Invalid information element contents
101 Message not compatible with call state
102 Recovery on timer expiry
111 Protocol error, unspecified
127 Interworking, unspecified
Sample ISDN Configurations
The following topics show several typical ISDN configurations.
Frame Relay over ISDN Configuration
Figure 36 shows how you can connect to a Frame Relay network through an ISDN
network. In this configuration, you set the data link on your dial circuits to Frame
Relay.
Note: Dial circuits default to point-to-point (PPP) protocol. To change the protocol
to Frame Relay, enter set data-link fr at the Config> prompt. A connection
will only be usable if the data link on both ends matches (for example, either
FR to FR, or PPP to PPP).
Note: N could be either an ISDN TA connected to the FR switch, or an ISDN card
in a FR switch.
Frame
Relay
ISDN
Router 1
Router 2
N
Figure 36. Frame Relay over ISDN Configuration
Using ISDN
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MRS V3.2 Software User’s Guide