r/3CXOfficial

Hello

We have a requirement to see if we can pass through 3CX dial codes (*83 and *84 particularly). Using yealink handsets, pressing the transfer button works fine, but if we put a complete code in eg. *83#1234# to warm transfer a call, nothing connects. It doesn't even hit the 3CX event or app log. Any ideas? I've looked at a few 'google' replies and some 3CX info but nothing seems to fix it. T33G is the handset. Scenario is external caller calling in, then person called needs to transfer call to another person. Could it also be perhaps not enough available lines?

Hey everyone,

I'm experiencing an inconsistent caller ID issue with the 3CX iOS app and I'm hoping someone here has run into this before.

The problem:

When I receive incoming calls, the iOS app sometimes displays the correct caller's number, but other times it only shows the PBX/trunk name instead. The behavior seems random — same setup, same trunk, but different results depending on the call.

What I've already tried:

I went into Trunk → Options and configured the caller ID fields:

- **Remote Party ID** → set to `CallerNum`

- **P-Asserted Identity** → set to `CallerNum`

Despite these changes, the issue persists intermittently.

Environment:

- 3CX (cloud hosted)

- iOS app (Version 5.5 Build 148 - 20.0.20.148)

- SIP trunk (orchestra/eutelia voip)

Questions:

- Has anyone else seen this inconsistency where caller ID works correctly on some calls but not others?

- Could this be a SIP header issue coming from the provider side, where some calls don't include the expected headers?

- Are there any other trunk or inbound rule settings I should be looking at?

Any help or pointers would be greatly appreciated. Thanks!

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