OpenScape 4000 STMD3b — ISDN S0 Station/Trunk Module (Variant B)
Variant B of the STMD3 family — same core architecture as STMD3a (8 S0 trunk + station combined) but with a different LED layout and loadware variant. Function-equivalent successor to STMD2.
Specifications
- Tip / Type
- Station/Trunk Module Digital S0
- Varyant / Variant
- B
- Trunk arabirim sayısı / Trunk interfaces
- 8 × S0 (4-wire)
- S0 access tipi / S0 access type
- Basic Rate (2B + D)
- Yerini aldığı / Replaces
- STMD2 + SLMS2 (fonksiyon eşdeğer)
- STMD3a ile uyumluluk / STMD3a compatibility
- Aynı sistemde değiştirilebilir
- Konnektör / Connector
- SIPAC
- LED sayısı / LEDs
- 2 (ön panel)
- Flash koruma / Flash protection
- On-board
- Kısa bus / Short bus
- ≈ 60 m
- Uzun bus / Extended bus
- 160 m (AMO SBCSU EXTBUS=YES)
Key features
- 8 S0 trunk interfaces (4-wire) — each 2B (64 kbit) + D (16 kbit) basic access.
- Combines STMD (trunk) and SLMS (station) on one board.
- Variant B: different LED layout and loadware variant (interchangeable with Variant A in the same system).
- SIPAC backplane connector.
- Front panel: 2 LEDs — STMD3 family.
- On-board flash protection.
- Short bus: ~60 m cable; extended bus (AMO SBCSU EXTBUS=YES): 160 m.
- MDF cable: new standard, different from STMD2.
Typical applications
Alternative to Variant A when stock is low — interchangeable in the system.
Application differences depending on loadware — chosen per project requirement.
STMD2 fleet refresh — migration to V11 platform.
Same function — variant selection per strategist guidance.
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DetailsVariant B of the STMD3 family — same core architecture as STMD3a (8 S0 trunk + station combined) but with a different LED layout and loadware variant. Function-equivalent successor to STMD2.