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- SLC Card: Subscriber Line Carrier Card
- DLC Card: Digital Line Carrier Card
- DLI: Digital Line Interface
- DTI: Digital Trunk Interface
- RST Card: Register Sender Trunk
- LC Card: Line Circuit
- ALC: Analog Line Circuit
- XLC: Extended Line Circuit
- OPS Card: Off Premises Subscriber Card
- COT Card: Central Office Trunk Card
- TRK Card: Trunk Card
- XTRK Card: Extended Trunk Card
- VM Card: Voice Mail Card
- PBR Card: Push Button Receiver Card
- CPU Card: Central Processing Unit Card
- PWR Card: Power Card
- AA Card: Auto-attendant Card
- Conf Card: Conference Card
- GW Card: Gateway Card
- I/O Card: Input Output Interface Card
- RG Card: Ring Generator Card
- ICB Card: Integrated Conference Bridge Card
- FALC Card: Flexible Analog Line Carrier Card
- 3PE Card: 3 Port Extender Card
- MEM Card: Memory Card
- SDI Card: Serial Data Interface Card
- PE Card: Port Extender Card
- MWI Card: Message Waiting Interface Card
- BRI Card: Basic Rate Interface Card
- CNI Card: Core to Network Interface Card
- CC Card: Clock Controller Card
- DTR Card: Digitone Receiver Card
- SDI Card: Serial Data Interface Card
- HLC Card: Hybrid Line Card
- Dual Port Serial Data Interface Card
- Disk Unit with CD-ROM (IODU/C)
- D-channel Handler Interface
- Dual Loop Peripheral Buffer Card
- D-channel daughterboard
- Direct In/Direct Out Dial Trunk Card
- Data Access Card
- E&M Trunk Card
- Extended Tone Detector
- Fiber Peripheral Controller card
- Fiber Junctor Interface Card
- Generic Central Office Trunk Card
- Inter Group Switch Card
- Hybrid Bus Terminator
- Local Carrier Interface
- Line side T1 Line Card
- Multi-purpose ISDN Signaling Processor
- Network Card
- Optical Cable Management Card
- Peripheral Signaling Card
- Remote Carrier Interface
- Super loop Network Card
- S/T Interface Line Card
- U Interface Line Card
Helpful for PABX technical