# OpenScape 4000 SLMAV — 24-port Analog Subscriber Line Card

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

24-port T/R analog subscriber card for OpenScape 4000 — same feature set as SLMAE, supports CLIP and includes an internal 71 Vrms ring voltage generator (no external ringer needed). 1800 Ω loop drives a standard 600 Ω phone up to 4.5 km cable distance.

## Key features

- 24 analog T/R ports (S30810-Q2227-X).
- CLIP (calling line identification presentation) support.
- Internal 71 Vrms ring voltage generator — no external ringer generator required.
- Line functions: overvoltage protection + ringing + line supervision/signaling + codec + hybrid 2W↔4W + loopback test.
- Max 1800 Ω loop resistance: 17.82 km on AWG24, 11.21 km on AWG26, 5.36 km on 'giga' cable (300 Ω phone).
- Up to 4.5 km on a standard 600 Ω phone.
- MDF assignment documentation included.
- Hot-pluggable removal/replacement per §6.4.3/6.4.4.

## Specifications

- **Type:** Subscriber Line Module Analog Voice
- **Order number / Part:** S30810-Q2227-X
- **Ports:** 24 × analog T/R
- **CLIP support:** Yes
- **Internal ringer:** 71 Vrms
- **Max loop resistance:** 1800 Ω
- **Max distance (600 Ω, AWG24):** 17.82 km
- **Max distance (300 Ω, AWG24):** Limits depend on the table
- **Line functions:** Overvoltage protection, ringing, supervision, codec, hybrid 2W↔4W, loopback
- **Replaces:** SLMAE (features retained)
- **Hot-plug:** Yes

## Use cases

- Preserve existing analog plant — keep legacy analog phones alive on the modern OS 4000 platform without IP migration.
- Hotel room phones — analog FXS with CLIP showing caller name.
- Hospital patient room — analog single-button emergency phones.
- Elevator / panic-line phones — overvoltage protected lines.
- Manufacturing alarm lines — analog supervision detects line break.

## For a quote and BOM

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