Telos Zephyr Xstream, User Manual

Page: 40 / 381

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.
A computer plugged into this port can control the system, and can access a number of special
diagnostic modes, as described in Section 12 (System Functions & Remote Control). It is also
possible to connect to the Zephyr Xstream’s command line using TCP/IP (see below).
When used for local control this function is always available. For more on the local command set
see Section 12.
This port can also be placed in a “transparent mode” to allow communication with another
Zephyr (Layer ‐ 3 only) or Zephyr Xstream (Layer ‐ 3 & AAC only). Note single ‐ direction
communication is possible if the correct coding mode is only used in one direction.
The following tables show the recommended cable configuration for connecting the Telos
Zephyr Xstream to 9 ‐ pin and 25 ‐ pin DTE (computer) serial ports.