rad Megaplex 4100 modules:
| Product | Description | Size | |
| HS-6N, HS-12N | 6/12-Channel High Speed Data Module | 604KB | |
| HS-703 | 4-Channel G.703 Codirectional Data Module | 315KB | |
| HSF-1, HSF-2 | Fiber Optic Teleprotection Interface Module | 450KB | |
| HS-RN | 4-Channel Low Speed Data Module with End-to-End Control Signaling | 124KB | |
| HS-S | 4-Channel ISDN S Interface Data Module | 394KB | |
| HS-U, HS-U-6, HS-U12 | 4/6/12-Channel ISDN U Interface Data Modules | 851KB | |
| LS-6N, LS-12 | 6/12 Channel Low Speed Data Modules | 900KB | |
| M8SL | 8 Port SHDSL E1 Module | 525KB | |
| M8E1, M8T1 | 8 Port E1 and T1 Modules | 544KB | |
| VC-4, VC-4A, VC-8, VC-8A, VC-16 | 4/8/16-Channel PCM and ADPCM Voice Modules | 1,433KB | |
| VC-4/OMNI | Omnibus PCM Voice Module | 894KB |