# 32401: BYOC Trunk routing failure - failover to Twilio default routing.

Log Type: APPLICATION

Log Level: WARNING

## Description

Call delivery attempt(s) over the specified BYOC Trunk did not succeed. Failover to Twilio default routing took place.

### Possible causes

Twilio encountered errors communicating with your SIP communications infrastructure.

### Possible solutions

Look for errors with error code [32011](/docs/api/errors/32011), Error communicating with your SIP communications infrastructure, and follow instructions.