{prodname} provides a set of `signal.*` properties that control how the connector interacts with the Kafka signals topic.

The following table describes the Kafka `signal` properties.

.Kafka signals configuration properties
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|===
|Property |Default |Description
|[[{context}-property-signal-kafka-topic]]<<{context}-property-signal-kafka-topic, `+signal.kafka.topic+`>>
|<topic.prefix>-signal
|The name of the Kafka topic that the connector monitors for ad hoc signals.
[NOTE]
====
If {link-prefix}:{link-topic-auto-creation}#topic-auto-create-config[automatic topic creation] is disabled, you must manually create the required signaling topic.
A signaling topic is required to preserve signal ordering.
The signaling topic must have a single partition.
====

|[[{context}-property-signal-kafka-groupId]]<<{context}-property-signal-kafka-groupId, `+signal.kafka.groupId+`>>
|kafka-signal
|The name of the group ID that is used by Kafka consumers.

|[[{context}-property-signal-kafka-bootstrap-servers]]<<{context}-property-signal-kafka-bootstrap-servers, `+signal.kafka.bootstrap.servers+`>>
|No default
|A list of the host and port pairs that the connector uses to establish its initial connection to the Kafka cluster.
Each pair references the Kafka cluster that is used by the {prodname} Kafka Connect process.

|[[{context}-property-signal-kafka-poll-timeout-ms]]<<{context}-property-signal-kafka-poll-timeout-ms, `+signal.kafka.poll.timeout.ms+`>>
|`100`
|An integer value that specifies the maximum number of milliseconds that the connector waits when polling signals.
|===
