IAD Network Interface Indicators Are Off During Diagnosis of the Off-Hook Exception on the User Port

Symptom

The IAD network interface has two indicators. One indicator is steady green when the connection is proper. The other indicator blinks red when data is sent or received. If data is sent or received frequently, the other indicator may be steady red.

Possible Cause

• The firmware is faulty, or software commissioning causes this fault.
• The network cable of an incorrect type is used, for example, crossover cables instead of common network cables are used.
• The network cable and network interface are connected abnormally.
• The network cable and the cable check function status do not match.
  • If the cable check function is enabled, both common network cables and crossover cables can be used.
  • If the cable check function is disabled, only network cables matching the connected device can be used. Crossover cables need to be used for an interface of the same type, and common network cables need to be used for an interface of a different type.

• The IAD network interface is an LSW interface. If the cable check function is disabled, common network cables can be used because the network interface of the peer end connected to the IAD can automatically recognize the network cable.

Solution

1. Run the ping command to determine whether the registration bearer channel is reachable.
2. On the SoftX3000, run the DSP MGW command to determine whether the corresponding IAD is registered properly.
3. Verify that the registration signaling is reachable. (MGCP signaling tracing)
4. On the IAD, run the show port command to determine whether the port on the IAD is normal. The port status indicates the status of the connection from the IAD to the user's phone. If no, the plugboard is generally faulty.
5. If yes, run the DSP EPST command on the SoftX3000 to check the IAD port status. If the port status is abnormal, user data is generally not configured.