# OpenScape 4000 SLMU — 24-port UP0/E Subscriber Line Card

URL: https://www.promark.tr/en/products/slmu
Category: Expansion Cards & Modules
Family: [OpenScape 4000 Cards](https://www.promark.tr/en/products/openscape-4000-cards)

24-port UP0/E card for OpenScape 4000 digital subscriber lines — successor to the SLMO and SLMOP boards. 2B+D ISDN Basic Rate interface, up to 1000 m cable length (ICCS).

## Key features

- Order number: S30810-Q2344-X100.
- 24 UP0/E ports — each a 2B+D ISDN Basic Rate (CorNet-TS) interface.
- Successor to SLMO (Q2168-X) and SLMOP — requires system SW V7 R2+.
- Not backward compatible with older system SW versions.
- Maximum cable length 1000 m (ICCS-compliant) — depending on the cable type used.
- OSA SLO (SLMU) variant — same function in OpenScape Access SLO form factor (S30807-U6648-X111).
- Power: -48 V + 5 V from the shelf's external PSU (most chips are 3.3 V; only backplane drivers differ).
- RUN (green) + FAIL (red) LEDs report the board status.
- PCM + HDLC (High Level Data Link Control) backplane interfaces.
- Coexists with OS 4000 SoftGate/Branch on the same system.

## Specifications

- **Type:** Subscriber Line Module Universal (UP0/E)
- **Order number / Part:** S30810-Q2344-X100
- **Ports:** 24 × UP0/E (2B+D ISDN BRI)
- **Max cable length:** 1000 m (ICCS compliant)
- **Replaces:** SLMO (Q2168-X), SLMOP
- **Min system SW:** OpenScape 4000 V7 R2.x.x
- **Backward compatible:** No
- **OSA SLO variant:** S30807-U6648-X111
- **Power:** -48 V + 5 V (from shelf)
- **Backplane interfaces:** PCM + HDLC
- **LED:** RUN (green) + FAIL (red)

## Use cases

- Hotel room phones — 24 UP0/E per shelf for 24 rooms; ICCS-compliant cabling for 1000 m reach.
- Hospital ward — digital exam-room phones in non-IP buildings.
- Bank branch — migration of legacy Optipoint/OptiSet infrastructure to the V11 platform.
- Manufacturing site — line infrastructure for noise-resistant digital phones in the field.
- Legacy SLMO refresh — prerequisite for V7 R2+ platform upgrade.

## For a quote and BOM

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