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Codex Modems are also known as Codex Motorola Modems.
Some models are exactly the same as Motorola UDS models.

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Codex Limited Distance Modem
Model # Description
2171 Codex limited distance sync/async 2 wire/4 wire 19.2 kbps line driver
2172 Codex Bell spec - 30, 48, 56, 64, 72 & 80 kbps asyn only half/full duplex 2 or 4 wire
2173 Codex Bell 2400 to 19.2 kbps sync/async full duplex 4 wire
2174 Codex Bell spec - 30, 48, 56, 72 & 80 kbps –sync only full duplex 4 wire
2177 Codex ldsu stand alone unit with power supply
FIBER Codex proprietary - up to 19.2 or 56kbs sync-full or half duplex - st or sma
LDA/19.2 Codex proprietary - 300-19.2 kbps sync only 4 wire
SRM-6SX Codex 2400 to 19.2 kpbs - sync line driver self powered - full duplex 4 wire
T-1 FIBER Codex proprietary - t-1 (15.44 mpbd) 3 mile range full duplex 4 wire

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