
Avaya EU24BL backlit button expansion module, 24 programmable keys for compatible digital/IP phones.
The Avaya 700381825 is an EU24BL button expansion module, adding 24 programmable, backlit call appearance and feature keys to a compatible Avaya digital or IP telephone. It attaches alongside the handset and is automatically labelled by the system, so feature and line assignments show up on the module without manual programming of each key.
The EU24BL works with the Avaya 2420, 4620SW, 4621SW, 5620SW, 5621SW and 4625SW telephones, and on IP phones it can be powered over Ethernet where Class 3 PoE is available, or from an Avaya 1151-series external power supply otherwise. IP Office supports up to eight EU24 modules per system, so a single site can equip several reception, attendant or executive desks with extra programmable keys without changing the handset model. It’s a common upgrade for busy extensions that regularly run out of line appearances or speed-dial keys on the base phone alone.
It’s a good match for organisations maintaining an existing Avaya digital/IP handset estate who need matching expansion modules. Tech-Star (UK-based, shipped worldwide) checks every module before it ships. Get in touch to confirm compatibility with your phone model.

| Platform | Avaya Aura |
|---|---|
| Manufacturer | Avaya |

| Platform | Avaya Communication Manager / IP Office |
|---|---|
| Manufacturer | Avaya |

| Platform | IP Office 500 |
|---|---|
| Manufacturer | Avaya |

| Platform | Avaya IP Office 500 |
|---|---|
| Manufacturer | Avaya |

| Platform | Avaya Definity / Communication Manager |
|---|---|
| Manufacturer | Avaya |

| Platform | 9600 Series |
|---|---|
| Manufacturer | Avaya |
| Key Features | 24 x programmable, backlit call appearance/feature keys; auto-labelled by the system; PoE (Class 3) or external PSU powered |
|---|---|
| Applications | Extra line appearances and speed-dial keys for busy reception, attendant or executive desks; Avaya digital/IP handset estate expansion |
| Compatibility | Avaya 2420, 4620SW, 4621SW, 5620SW, 5621SW and 4625SW telephones; up to 8 modules per IP Office system |
| Specifications | 24 programmable backlit keys; PoE Class 3 or Avaya 1151-series external PSU; attaches to compatible handset |
| Platform | Avaya 4620SW/4621SW/5620SW/5621SW/4625SW/2420 |
| Manufacturer | Avaya |
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