> ## Documentation Index
> Fetch the complete documentation index at: https://plivo.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Hangup Codes

> Understanding SIP hangup codes for voice agent calls

When calls disconnect, Plivo returns hangup codes to help identify the cause.

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## Hangup Sources

| Source | Description |
| - | - |
| **Customer** | Hangup initiated by your infrastructure |
| **Carrier** | Hangup initiated by the remote carrier |
| **Zentrunk** | Hangup initiated by Plivo |

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## Common Hangup Codes

| Code | Cause | Solution |
| - | - | - |
| 4030 | Insufficient credits | Add credits to your account |
| 4190 | Unknown caller ID | Use a Plivo-rented number as caller ID |
| 4590 | India media anchoring violation | Ensure server is located in India for India calls. See [Calling in India](/docs/voice-agents/sip-trunking/deploy/calling-in-india). |
| 5180 | CPS limit reached | Reduce your call rate, or ask Buddy in the [console](https://cx.plivo.com/home) to raise your CPS limit |
| 5190 | Concurrent call limit exceeded | Contact support to increase limits |

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## Full Hangup Code Reference

For the complete list of 60+ hangup codes with detailed descriptions, see [Zentrunk Hangup Codes](/docs/sip-trunking/troubleshooting/zentrunk-hangup-codes).

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## Debug Logs

Debug logs help troubleshoot connectivity issues during SIP trunking calls. Access them in the Plivo Console under Zentrunk → Logs.

### What's in Debug Logs

| Section | Information |
| - | - |
| **Call Details** | Initiation time, from/to numbers, duration, charges, STIR attestation |
| **Call Stats** | Trunk ID, domain, transport protocol, hangup cause/source |
| **SIP Logs** | Final SIP response, negotiated codec, downloadable SIP PCAP |

### Full Debug Logs Guide

For detailed information on interpreting debug logs, see [Zentrunk Debug Logs](/docs/sip-trunking/troubleshooting/zentrunk-debug-logs).