OpenScape Business X8 Cards

Mainboard, DSP, subscriber and trunk cards of the modular X8 PBX — OCCLA (V3 mainboard), OCCBL/OCCBH DSP boosters, SLMAV24N analog, SLMU digital (SLMO successor), SLMUC DECT (SLCN successor), DIUT3 PRI, TMANI analog trunk (w/o metering) and REALS PFT. ⚠️ X8 cards do not fit X3R/X5R or OS4000 — identically named cards are different parts.

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Scope / deliverables

OCCLA — V3 mainboard (8 onboard DSP); OCCBL +40 / OCCBH +120 DSP boosters
SLMAV24N — 24-port analog subscriber (CLIP); SLMU — 24 × UP0/E digital subscriber (SLMO8N/24N successor — SLMO no longer sold)
SLMUC = SLMU + CMAe — DECT base station card (SLCN successor); max 4/system, 128 DECT devices per card
DIUT3 — 2 × S2M PRI trunk (V3); TMANI — 8-port analog trunk w/o metering (metered type only on OS4000)
REALS — PFT relay: analog fallback on power/system failure
⚠️ Platform distinction: X8 SLMU/DIUT3/TMANI are DIFFERENT parts from the identically named OS4000 cards
Promark: slot/plate budgeting, PCM placement rules, capacity planning and commissioning

Products in This Family

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

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.

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OCCBL / OCCBH — UC Voice Channel Booster (DSP)

Booster cards extending the 8 onboard DSP channels of the X8 mainboard: OCCBL +40 DSP channels, OCCBH +120 DSP channels. Determines IP-TDM conversion, conferencing and voicemail channel capacity — required in dense IP/hybrid installations.

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OpenScape Business X8 OCCLA — V3 Mainboard

The new-generation (V3) mainboard of the X8 — system software runs on M.2 SSD. Slot 6 of the base box is dedicated to the mainboard. 8 onboard DSP channels; OCCBL/OCCBH boosters add more. The older OCCL (V2) board is used only in legacy projects.

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OpenScape Business X8 REALS — PFT Relay Card (4 Contacts)

The Power Failure Transfer (PFT) relay card of the X8 — on system/power failure it switches selected analog trunks directly to analog phones, keeping outside calling alive even if the PBX is down. Fits the REALS slot at the bottom of the base box; 4 contacts. The PFT4 relay (4 trunks) is available for additional fallback.

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OpenScape Business X8 SLMAV24N — 24-Port Analog Subscriber Card

24-port CLIP-capable analog (a/b) subscriber card for the X8. High-density connection of analog phones, fax, door intercoms and similar devices; wiring via the rear patch panel. An 8-port SLMAV8N variant exists but the 24-port card is preferred in practice.

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OpenScape Business X8 SLMU — 24-Port UP0/E Digital Subscriber Card

24 × UP0/E digital subscriber card for the X8 — successor of the discontinued SLMO8N and SLMO24N; the current single choice for digital subscribers on X8. Connects CP TDM (CP205T/CP405T) and OpenStage T phones; with the CMAe subboard it becomes SLMUC for DECT base station (BS5) connectivity. ⚠️ A different part from the identically named OS4000 SLMU.

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OpenScape Business X8 SLMUC — DECT Base Station Card (SLMU + CMAe)

Core card of the X8 Integrated Cordless (TDM-based DECT) solution: SLMU + CMAe echo cancellation subboard — successor of the SLCN card. BS5 base stations connect to its UP0/E ports; max 4 SLMUC per system, 128 registered DECT devices and 48 simultaneous calls per card. ⚠️ The OS4000 SLMC is a separate product.

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OpenScape Business X8 TMANI — 8-Port Analog Trunk Card (w/o Metering)

8 × a/b analog exchange line (trunk) card for the X8 — CLIP-capable, without GEE (metering); the variant sold for X8 in CPQ. Successor of TM2LP and TMC16. No on-board PFT — plan with the REALS PFT relay card for power-failure scenarios; wiring via the rear patch panel.

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