Telos Zephyr Xstream User Manual page 59

w
IMPORTANT!
Do Not enable PS2 power if you plan to connect the S interface of your Xstream to a Zephyr
Classic or ZephyrExpress.
Doing so could cause damage to one of the units!
i
ISDN TIP!
If you are connecting to ISDN using the S (4-wire) Interface you can ignore the status of the
NT1 Sync LED. It will be flickering rapidly if the U (2-wire) interface is not used.
V.35/X.21 Interface Option
Offers interface to digital synchronous serial bit‐streams, primarily for non‐ISDN applications.
Either V.35 and X.21 equipment can be accommodated by the use of the appropriate cable.
More information can be found in manual Section 9 (The V.35/X.21 Interface).
Communications and Control Ports
RS‐232 (DCE)
Using a female 9‐pin D‐sub connector, this is an RS‐232 serial
port using the standard modem‐style format. The default line
protocol is: 8 bits, 1 Stop Bit, No Parity, with no flow control.
Rate is selectable from 2400 to 57,600 bps using the RS232
menu selection in the first SYSTEM menu. Default is 19,200 bps.
Z
ZEPHYR 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).
USER'S MANUAL
Section 3: GUIDED TOUR of the HARDWARE 47