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USER’S MANUAL
Section 3: GUIDED TOUR of the HARDWARE 28
Z
ZEPHYR CLASSIC VS XSTREAM COMPARISON!
NOTE: The RS-232 connectors on the newer Telos gear, such as the Zephyr Xstream, are
wired to look like a modem (i.e. DCE), rather than a computer. Therefore, a standard
“straight through” cable can be used to connect the Xstream to your computer.
You told us that you were much more likely to connect your equipment to a computer than to
a modem, so we responded with this change. We regret any confusion this might cause.
If you need to connect your Xstream to a modem, use a "null modem" adapter such as Radio
Shack #26-1496 (25 pin to 25 pin) or #26-264 (9 pin to 9 pin).
PIN FUNCTION
1* DCD (Xstream to Computer)
2 RD (Xstream to Computer)
3 TD (Computer to Xstream)
5 Ground
6* DSR (Xstream to Computer)
8* CTS (Xstream to Computer)
* These handshake signals are present (i.e.
permanently asserted) on motherboard versions
"G" and later
Using a 9 pin female D-Sub connector, this is an RS-232 serial port using the standard 9-pin format,
configured as if it were a modem. Zephyr Xstream ignores any incoming handshake signals.
Acomputerpluggedintothisportcancontrolthesystem,andcanaccessanumberofspecial
diagnosticmodes,asdescribedinSection12(SystemFunctions&RemoteControl).Itisalso
possibletoconnecttotheZephyrXstream’scommandlineusingTCP/IP(seebelow).
Whenusedforlocalcontrolthisfunctionisalwaysavailable.Formoreonth
elocalcommandset
seeSection12.
Thisportcanalsobeplacedina“transparentmode”toallowcommunicationwithanother
Zephyr(Layer‐3only)orZephyrXstream(Layer‐3&AAConly).Notesingle‐direction
communicationispossibleifthecorrectcodin
gmodeisonlyusedinonedirection.
ThefollowingtablesshowtherecommendedcableconfigurationforconnectingtheTelos
ZephyrXstreamto9‐pinand25‐pinDTE(computer)serialports.