# OpenScape Business X8 DIUT3 — 2 × S2M (PRI) Trunk Card

URL: https://www.promark.tr/en/products/diut3-x8
Category: Expansion Cards & Modules
Family: [OpenScape Business X8 Cards](https://www.promark.tr/en/products/osbiz-x8-cards)

2 × S2M (ISDN PRI) digital trunk card for X8 V3 systems — successor of DIUT2. Terminates carrier PRI lines; rear-side connection (counts toward Rear Cover Plate budgeting). ⚠️ A different part from the identically named OS4000 DIUT3; the older DIUT2 is used only on V2 (OCCL) systems.

## Key features

- 2 × S2M (ISDN PRI, 30B+D) digital trunk ports.
- For V3 systems (OCCLA mainboard); DIUT2 only on V2/OCCL.
- Plate budgeting: DIUT3 → Rear Cover Plate (rear connection).
- S2M 120-Ohm cable (10 m, A443) is used with DIUT2 — confirm DIUT3 cabling per project.
- ⚠️ The OS4000 DIUT3 (E1/T1 loadware trunk card) is a DIFFERENT product.
- Promark: PRI capacity planning and commissioning.

## Specifications

- **Type:** ISDN S2M (PRI) trunk card
- **Port:** 2 × S2M (PRI)
- **Platform:** OpenScape Business X8 — V3 (OCCLA)
- **Predecessor:** DIUT2 (L30251-U600-A824) — V2/OCCL only
- **Connection:** Rear (Rear Cover Plate)
- **Distinction:** OS4000 DIUT3 is a DIFFERENT part
- **Mitel PN:** 50009401
- **Unify L No:** L30251-U600-A989

## Use cases

- Terminating carrier PRI (S2M) lines on the X8.
- PRI redundancy during SIP trunk migration.

## For a quote and BOM

https://www.promark.tr/en/contact · +90 312 544 09 15 · destek@promark.tr