What an event flow can do

Verified 2026-09-15 · 10 claims · sources tier 2 · 1 disputed

Also known as CallbackFailed, OutboundCampaignCallResult, PreDial.

An event flow shares custom flow variables and event output variables with the main flow 8. Both canvases contribute to the flow's average duration and average activities per contact 8.

Permitted activities and restrictions

Neither the blind transfer nor the bridged transfer activity may be placed in an event flow 9. The set caller identity activity may be used only in an event flow, where it serves as the terminal activity of the pre-dial event flow 7.

Certain activities are permitted or restricted based on the specific event handler:

• The callback failure handler sanctions the callback, queue to agent, and queue contact activities inside an event flow, and can route a contact to a different destination 2.
• The call progress analysis activity may appear in an event flow only on the callback failure handler 1.
• The outbound campaign call result event flow is restricted to the play music and play message activities, and a virtual agent may not be used in it directly 4.

WarmTransfer's reading of the sources is that placement rules are not enforced visibly: the corpus holds 1 placement rule that produces no runtime warning when broken, and the documentation states no general rule about when event flow placement is validated 6.

Event availability and execution

Sources disagree on the availability of the phone contact ended event: it is described as available with selected call handling activities and, 2 sentences later, as exposed only by the queue contact activity 5.

No source states whether 2 event flows can run at once, whether 1 can run while the main flow is mid-activity, or what happens when an event fires while its own handler is still running 3.

See also

• See also The Webex Contact Center Flow Designer activity set.
• See also Webex Contact Center Flow Designer architecture.
• See also Webex Contact Center preview and progressive outbound campaigns.

Applicability

Across the claims in this article, the evidence covers Cisco Webex Contact Center, verified as of 2026-09-05. The deployment model is not covered by any claim in this article.

What remains uncertain

When event flow placement rules are validated is not covered by any claim in this article. Which activities are permitted on the event flow canvas is not covered by any claim in this article.

WarmTransfer. (2026, September 15). What an event flow can do. WarmTransfer. https://warmtransfer.net/knowledge/wxcc-event-flow-behaviour

@misc{warmtransfer-wxcc-event-flow-behaviour,
  title  = {What an event flow can do},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/wxcc-event-flow-behaviour},
  note   = {Verified 2026-09-15}
}