
Nortel NTBK45AC System Core card for the Meridian Option 11 PBX.
The Nortel NTBK45AC is a System Core card for the Meridian Option 11 PBX platform, providing the central processing and control function for the switch.
The System Core card runs the Meridian 1 call-processing software for the Option 11 cabinet and coordinates the line, trunk and network cards installed alongside it, making it one of the essential control cards in an Option 11 configuration rather than an optional add-on.
The NTBK45AC is specific to Nortel’s Meridian Option 11 PBX. Tech-Star (UK-based, shipped worldwide) checks every card before it ships. Get in touch to confirm compatibility with your Option 11 system and software release.

| Platform | DWDM optical transmission |
|---|---|
| Manufacturer | Nortel |

| Platform | Nortel CallPilot 200 (Meridian/CS1000) |
|---|---|
| Manufacturer | Nortel |

| Platform | Nortel Passport 6400/7400 |
|---|---|
| Manufacturer | Nortel |

| Platform | Nortel Optical Metro 4000 |
|---|---|
| Manufacturer | Nortel |

| Platform | GBIC/SFP / Gigabit Ethernet optics |
|---|---|
| Manufacturer | Nortel |

| Platform | Meridian 1 |
|---|---|
| Manufacturer | Nortel |
| Key Features | Central call-processing and system control card; core Option 11 component |
|---|---|
| Applications | System control and call processing on Meridian Option 11 PBX cabinets |
| Compatibility | Nortel Meridian Option 11 platform |
| Specifications | Option 11 System Core card |
| Platform | Meridian Option 11 |
| Manufacturer | Nortel |
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