IBM 3708 Planning And Installation page 35

Protocol Protocol
ASCn
Function Conversion Enveloping' Pass-Through
Autobaud/parity for 110 through 4800 and 9600 bps Optional Optional Optional
for downstream devices
Line speeds up to 19200 bps Optional Optional Optional
EIA 232C support for (SNA and ASCII) host Standard Standard Standard
connection
EIA 232C support for downstream device connection Optional Optional Optional
EIA 422A support for downstream device connection Optional Optional Optional
Selection of 3708 logon screens Optional Optional Optional
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3708 Planning and Installation