Displaying the ISDN Status

Purpose

Display the status of ISDN service on the ISDN interface. For example, you can display ISDN BRI status on the br-6/0/0 interface and ISDN PRI status on the ct1-2/0/0 interface.

Action

From the operational mode in the CLI, enter show isdn status.

Sample Output

Interface: br-6/0/0 
 Layer 1 status: active
 Layer 2 status: 
  CES: 0, Q.921: up, TEI: 12
 Layer 3 status: 1 Active calls
  Switch Type           : ETSI
  Interface Type        : USER
  T310                  : 10 seconds
 Tei Option            : Power Up

Interface: ct1-2/0/0
 Layer 1 status: active
 Layer 2 status:
  CES: 0, Q.921: up, TEI: 0
 Layer 3 status: 8 Active calls
  Switch Type           : NI2
  Interface Type        : USER
  T310                  : 10 seconds
  Tei Option            : Power Up

Meaning

The output shows a summary of interface information. Verify the following information:

• Interface—ISDN interface currently active on the device. For ISDN BRI, the interface is a br-pim/0/port interface, as shown in the first example for br-6/0/0. For ISDN PRI, the interface displayed is a channelized T1 or channelized E1 interface, as shown in the second example for ct1-2/0/0.
• Layer 1 status—Indicates whether Layer 1 is active or inactive.
• Layer 2 status—Indicates whether Q.921 (the D-channel protocol) is up or down.
• TEI—Assigned terminal endpoint identifier (TEI) number.
• Layer 3 status—Number of active calls.
• Switch Type—Type of ISDN switch connected to the device interface.
• Interface Type—Default value for the local interface.
• Calling number—Telephone number configured for dial-out.
• T310—Q.931-specific timer.
• TEI Option—Indicates when TEI negotiations occur on the interface.

Related Topics

For a complete description of show isdn status output, see the JUNOS Interfaces Command Reference.