3Com MSR 50, MSR 30 manual Example # Display the current state of Isdn interface 2/0, 565

565

Description Use the display isdn call-infocommand 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	Connections 1 through 8 at layer 2 of the BRI interface
...
Link Layer 8
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.