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### Description

<!-- Explain what you did, what you expected to happen, and what actually happened. -->

Other modules use ims_usrloc_pcscf's callback calls for following operations:

#define PCSCF_CONTACT_INSERT (1<<0) #define PCSCF_CONTACT_UPDATE (1<<1) #define PCSCF_CONTACT_DELETE (1<<2) #define PCSCF_CONTACT_EXPIRE (1<<3)

### Troubleshooting

#### Reproduction

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#### Debugging Data

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gdb /path/to/kamailio /path/to/corefile bt full info locals list

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``` (paste your debugging data here) ```

#### Log Messages

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#### SIP Traffic

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``` (paste your sip traffic here) ```

### Possible Solutions

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### Additional Information

* **Kamailio Version** - output of `kamailio -v`

``` (paste your output here) ```

* **Operating System**:

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``` (paste your output here) ```