The OKITAC-5099(T2) was completed in May 1961 as a magnetic tape unit to connect with the OKITAC5090C and D Series.
The 5099T3 and T4, which were developed in 1962 for the OKITAC5090M, were completed with specifications compatible with IBM magnetic tape. A max.imum of 4 magnetic tape channels could be connected to a 5090M, and a max.imum of 10 magnetic tape units could be connected to each channel. Each data channel could operate independently, and thus it was possible to conduct reading and writing simultaneously.
|Tape rewind speed||150inch/s||-||-|
|Tape used||Width 1/2inch||Width 1/2inch||Width 1/2inch|
|Number of tracks||7||7||7|
|Reel diameter||10.5 inch||10.5 inch||10.5 inch|
|Reel hub||IBM or NARTB type||IBM||IBM|
|Tape startup time||2.5ms max..||3ms max..||3ms max..|
|Tape stopping time||1.5ms max..||1.5ms max..||1.5ms max..|
|Information transfer speed||41.7Kchar/s||41.7Kchar/s||62.5Kchar/s|
|Tape end detection||Reflective type or short circuit type, using conductive foil||Reflective type or short circuit type, using conductive foil||Reflective type or short circuit type, using conductive foil|
|Power supply||AC100V 50c/s or 60c/s||-||-|