# My PBX Is registered, but I can not receive any calls (outgoing calls are fine) If you are unable to receive calls although your PBX is registered and outgoing calls are working, we'd recommend checking the following settings in your PBX: * The Outbound Proxy **must** be set in order to receive incoming calls. Please set this to sipconnect.sipgate.co.uk * Ensure your PBX is not requesting an authentication proxy **from** sipgate * Double check the number assignment within your PBX (format E164 only) * Ensure all of your PBX's IP addresses and ports are correctly allocated and accessible * If your NAT setting is set to **yes**, change this to **no**. NAT detection is not implemented with sipgate trunking * Please also ensure that your SIP-ID is not allocated as your DID. Instead, leave this field blank If you're still having issues after making the above changes, please send an email to our support team at . --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://teamhelp.sipgate.co.uk/integrations-and-connections/hardware-and-software/my-pbx-is-registered-but-i-can-not-receive-any-calls-outgoing-calls-are-fine.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.