# \[New Feature - 5.10.0\] Backward Compatibility between ePMP4500s APs and ePMP1000s, F180s, F190s, F200s SMs

**URL:** https://community.cambiumnetworks.com/t/new-feature-5-10-0-backward-compatibility-between-epmp4500s-aps-and-epmp1000s-f180s-f190s-f200s-sms/105024
**Category:** ePMP
**Tags:** knowledge-base
**Created:** [April 14, 2025, 3:43pm UTC](https://community.cambiumnetworks.com/t/new-feature-5-10-0-backward-compatibility-between-epmp4500s-aps-and-epmp1000s-f180s-f190s-f200s-sms/105024 "2025-04-14T15:43:22Z")
**Posts on this page:** 1
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### Author: ![Fedor](https://d10gw3vjmzyp8.cloudfront.net/user_avatar/community.cambiumnetworks.com/fedor/32/20305_2.png) [@Fedor](https://community.cambiumnetworks.com/u/Fedor)
#### Post date: [April 14, 2025, 3:43pm UTC](https://community.cambiumnetworks.com/t/new-feature-5-10-0-backward-compatibility-between-epmp4500s-aps-and-epmp1000s-f180s-f190s-f200s-sms/105024/1 "2025-04-14T15:43:23Z")

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**Affected platforms: ePMP4500s**  
**Affected versions: 5.10.0 and newer**

**Backward Compatibility in ePMP 5.10.0 and Migration Mode Overview**

Starting with the ePMP 5.10.0 release, backward compatibility has been introduced between ePMP 4500 series Access Points (APs) and legacy Subscriber Modules (SMs) such as the ePMP 1000s, Force 180s (F180), Force 190s (F190), and Force 200s (F200). This functionality allows network operators to continue supporting older SMs while upgrading APs infrastructure.

To enable this feature, navigate to the **Configuration → Radio** section of the web user interface and activate **Migration Mode**.

 ![Screenshot 2025-04-14 at 10.18.09](https://d1okf4ta8xniw3.cloudfront.net/original/3X/5/a/5a2284544d700ad39220a083eb37fe62e36ae6db.png)

**Migration Mode** is specifically designed to support legacy SMs—including F300, F180, F200, and ePMP 1000—during transitional periods. While this mode facilitates smoother upgrades and minimizes service disruption, it is intended strictly for temporary use during network migration. It is not recommended for long-term deployment due to performance trade-offs.

 ![Screenshot 2025-04-14 at 10.18.47](https://d1okf4ta8xniw3.cloudfront.net/original/3X/7/1/7186b86d85cb92a5b53cecf38ea7d9c7c010a7d2.png)

**Limitations of Migration Mode:**

- **Increased Latency:** Users may experience higher latency compared to standard (greenfield) deployments.
- **Reduced Throughput:** A slight decrease in data throughput may occur.
- **Performance Variability:** Overall sector performance is influenced by both the quantity and proportion of legacy SMs (F180, F200, ePMP 1000) connected to the AP.

**To achieve optimal performance, it is recommended to complete the migration to newer SM models as soon as feasible.**

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_[View the full topic](https://community.cambiumnetworks.com/t/new-feature-5-10-0-backward-compatibility-between-epmp4500s-aps-and-epmp1000s-f180s-f190s-f200s-sms/105024)._