# e2e.callPacket

Marker constructor whose CRC32 constructor ID is used when deriving and authenticating [encrypted group call packets](/api/end-to-end/group-calls.md#packet-encryption).

<!-- schema -->
```
e2e.callPacket#40a6bee9 = e2e.CallPacket;
```
<!-- /schema -->

### Parameters

This constructor does not require any parameters.

### Type
[e2e.CallPacket](/type/e2e.CallPacket.md)

### Related pages

#### [E2E Group Calls](/api/end-to-end/group-calls.md)
End-to-end encryption used for Telegram group voice and video calls, using a blockchain for state manageme