---
title: Why do I get a “Connection Timed Out” error with SMPP?
description: "A \"Connection Timed Out\" error means your client can’t reach our server. Test with telnet smpp.smsgatewaycenter.com 2775—if it fails, check your firewall, IP whitelist, or internet. Increase your client’s timeout settings if needed. Our [SMPP connection](https://www.smsgatewaycenter.com/smppConnectivity/) troubleshoot this—contact support if…"
url: "https://www.smsgatewaycenter.com/blog/kb/why-do-i-get-a-connection-timed-out-error-with-smpp/"
updated: "2025-02-26"
category: Bulk SMS / SMPP
---

# Why do I get a “Connection Timed Out” error with SMPP?

A "Connection Timed Out" error means your client can’t reach our server. Test with telnet smpp.smsgatewaycenter.com 2775—if it fails, check your firewall, IP whitelist, or internet. Increase your client’s timeout settings if needed. Our [SMPP connection](https://www.smsgatewaycenter.com/smppConnectivity/) troubleshoot this—contact support if unresolved for our **SMS gateway**.

### More Related Articles

- [Can I use SMPP with third-party tools like vTiger?](https://www.smsgatewaycenter.com/blog/kb/can-i-use-smpp-with-third-party-tools-like-vtiger/)
- [What’s the throughput limit for SMPP connections?](https://www.smsgatewaycenter.com/blog/kb/whats-the-throughput-limit-for-smpp-connections/)
- [How do I whitelist my IP for SMPP connectivity?](https://www.smsgatewaycenter.com/blog/kb/how-do-i-whitelist-my-ip-for-smpp-connectivity/)

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