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Set the DIDLogic destination to +[number]@<platform-sip-fqdn>;transport=tcp. Keep the exact +E.164 DID on the platform trunk and choose Provider source IPs. DIDLogic credentials are used for platform-to-DIDLogic outbound calls; they do not document digest toward an arbitrary inbound SIP URI. DIDLogic rejects a weak outbound password at save time — use at least 12 characters with mixed case. The official DIDLogic FAQ listed these unique signaling gateways on 22 August 2026:
DIDLogic recommends DNS-name firewall rules for resilience. The platform source-IP field accepts addresses/CIDRs, so refresh the official FAQ immediately before saving.

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Validate the setup

Call the DID externally and confirm the platform created an inbound record, routed the assigned assistant, and carried audio both ways. Source: DIDLogic gateway FAQ. Accessed 22 August 2026.