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