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This topic describes how to troubleshoot a call fails that occurs on the SS7 trunk.
Symptom
The following faults often occur on the SS7 trunk:
ϒ⁄A busy tone is heard when an incomplete called number is dialed.
ϒ⁄A busy tone is heard when a complete called number is dialed.
Possible Causes
The possible causes are as follows:
ϒ⁄The clock source is not configured.
ϒ⁄The intra-office and outgoing prefixes are not configured.
ϒ⁄The board status is abnormal.
ϒ⁄The trunk circuit is faulty.
ϒ⁄The trunk link status is faulty.
Parent Topic: Trunk Faults