Telos Zephyr Xstream User Manual page 303

Condition: Unable to connect when using SIP mode.
If standard streaming works, and SIP streaming does not, then the proper port for SIP is
probably not been opened up on the firewall. Both the SIP (default is 5060) and the UDP
(default is 9150) ports must be available when SIP is used. Audio in only one direction can be
caused by having the UDP port open only on one end.
13.6.6 Other Difficulties
Condition: Xstream powers up, but the writing on the LCD is too faint to read.
Possibly someone changed your contrast setting. We made this the first selection in the
<SYSTEM> menu for a reason. Follow these steps:
1. Press the <TEL> button once.
2. Press the <SYSTEM> button twice.
3. Press the <SEL> button once.
4. Press the <5> button repeatedly until the screen contrast is at the desired
level. Press the <SEL> button to save your setting.
NOTE: The contrast is somewhat affected by temperature, so you may need to
tweak this once the unit has come up to operating temperature.
Condition: No Basic Functionality
Does the Zephyr Xstream have power?
Whenever the unit is powered up the LCD display backlight should be on. If the
Interface menu selection in the ISDN menu is set to "ISDN", the SYNC LED should be
illuminated whenever power is applied. Is the switch on? Is the cord plugged‐in? Does
the outlet have power? Is the Xstream's fuse blown (see below)?
The installation and servicing instructions in this manual are for use by
qualified personnel only. To avoi d electric shock do not perform any ser-
vicing other than that contained in the Operating Instructions unles s you
are qualified to do so. Refer all servicing to qualified service pe rsonnel.
Section 13: Deep Tech Information and Troubleshooting
USER'S MANUAL
TO PREVENT RISKS OF
ELECTRIC SHOCK,
DISCONNECT POWER
CORD BEFORE SERVICING
CAUTION
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