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Description Use the display isdn call-info command to view the current state of ISDN
interfaces. If no interface has been specified, the system will display the current
states of all the ISDN interfaces.
Executing this command will output the state of each layer of the ISDN protocol
on one or all interfaces, including the information of Q.921, Q.931 and CC
modules. You may make troubleshooting based on the output information.
Example # Display the current state of ISDN interface 2/0.
<Sysname> display isdn call-info interface bri 2/0
Bri 2/0(User-side): ACTIVE
Link Layer 1: TEI = 65, State = MULTIPLE_FRAME_ESTABLISHED
Link Layer 2: TEI = NONE, State = TEI_UNASSIGNED
Link Layer 3: TEI = NONE, State = TEI_UNASSIGNED
Link Layer 4: TEI = NONE, State = TEI_UNASSIGNED
Link Layer 5: TEI = NONE, State = TEI_UNASSIGNED
Link Layer 6: TEI = NONE, State = TEI_UNASSIGNED
Link Layer 7: TEI = NONE, State = TEI_UNASSIGNED
Link Layer 8: TEI = NONE, State = TEI_UNASSIGNED
Network Layer: 1 connection(s)
Connection 1 :
CCIndex:0x0055 , State: Active , CES:1 , Channel:0x00000001
TEI: 65
Calling_Num[:Sub]:
Called_Num[:Sub]: 6688164
Table 95 Description on the fields of the display isdn call-info command
Field Description
BRI 2/0(User-side): ACTIVE Interface BRI 2/0 is operating at the user side of ISDN; the D
channel is active
Link Layer 1
...
Link Layer 8
Connections 1 through 8 at layer 2 of the BRI interface
TEI Terminal equipment identifier
State Current state of the layer 2 link. It can be one of the
following:
TEI_UNASSIGNED
ASSIGN_AWAITING_TEI
ESTABLISH_AWAITING_TEI
TEI_ASSIGNED
AWAITING_ESTABLISHMENT
AWAITING_RELEASE
MULTIPLE_FRAME_ESTABLISHED
TIMER_RECOVER
TEI_ASSIGNED_EXT1: a state option for TBR3 test, meaning
a deactivation instruction is received from the underlying
layer
TEI_ASSIGNED_EXT2: a state option for TBR3 test, meaning
link establishment request is received
Network Layer: 1 connection(s) Only one network layer connection is present on the
interface.