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ADTRAN Adtran TSU ACE T1/Fractional T1 CSU/DSU
ADTRAN TSU ACE - DSU/CSU - external - 1.544 Mbps - T-1
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ADTRAN Adtran TSU Dual Office Channel Unit Dataport Plug-on Module
ADTRAN OCU DP Dual - Modem (digital) - plug-on module - expansion slot - 64 Kbps - 2 digital port(s)
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