Used - Like New: MultiTech MultiModem ZDX MT5656ZDX V.92 Data/Fax Modem 56Kbps RS-232 (Serial Port) Modems / Gateways - Newegg.com
Multi Tech Systems Owner's Manual Modem 224E5 224E7 Great Condition c 1990 | eBay
Appendix h: ascii character map, H ascii character map, Multimodemii user guide | Multitech MULTI MODEM II MT5600BA User Manual | Page 109 / 113 | Original mode
User manual Multitech MultiTech Conduit (English - 30 pages)