# OpenStage Busy Lamp Field 40 — 90-key Switchboard Module

URL: https://www.promark.tr/en/products/openstage-blf40
Category: Endpoints
Family: [OpenStage IP Family — 15 / 40 / 60 (Legacy)](https://www.promark.tr/en/products/openscape-openstage)

Switchboard/operator module connecting to OpenStage 40 and OpenStage 60 phones, with 90 freely programmable LED keys. Paper-insert labeling; supported on HFA (IP) and TDM (OpenStage 30T/40T/60T).

## Key features

- 90 freely programmable LED keys — entire operation at a glance.
- Line, speed-dial or feature key with LED state indication.
- Paper-insert labeling — printed or hand-written personalization.
- Up to 1 BLF40 module per phone.
- External PSU required — to power the module itself.
- Ice blue or lava color.
- IP compatibility: OpenStage 40 HFA, OpenStage 60 HFA (HFA only — not supported on SIP).
- TDM compatibility: OpenStage 30 T, OpenStage 40 T, OpenStage 60 T.

## Specifications

- **Keys:** 90
- **Key type:** Mechanical, with LEDs
- **Labeling:** Paper inlay (writable or printed)
- **Connection:** Phone side port (direct)
- **Max modules:** 1 per phone
- **Compatible phones (IP):** OpenStage 40 HFA, OpenStage 60 HFA (HFA only)
- **Compatible phones (TDM):** OpenStage 30 T, OpenStage 40 T, OpenStage 60 T
- **External PSU:** Mandatory
- **Color:** Ice blue or lava
- **Operating temperature:** +5 °C to +40 °C

## Use cases

- Hotel / hospital switchboard — track every internal user from a single 90-key module.
- Call-center supervisor — 90-agent presence (BLF) snapshot.
- Corporate switchboard operator — exec hierarchy + frequent external customers on one panel.
- Government building switchboard — manage a large number of internal users from one module.
- Note: not supported on OpenScape Voice SIP — HFA and TDM only.

## For a quote and BOM

https://www.promark.tr/en/contact · +90 312 544 0915 · destek@promark.tr