AT&T SB67030 System Administrator Manual page 31

AT&T SB67010 Gateway, SB67030 Deskset System Administrator's Guide
To restore the system after an AC power failure: (Continued)
Figure 29. Idle Screen
The SB67010 PSTN Gateway has an additional RJ-11 Bypass jack into which a regular phone can be plugged to get direct access
to an analog line for emergency calls when the Gateway loses power. The Gateway uses a relay to disconnect this emergency
bypass line when the system is up and running, so that the emergency bypass line can't be used to eavesdrop on normal calls.
If you have a PSTN line plugged into Line 4, an analog telephone plugged into the Bypass jack provides communication during
AC power outages.
System Description
If the Gateway cannot find a DHCP server on the network, it will assign a
link-local address that begins with the number 169 (169.xxx.xxx).
The presence of computers and other devices on the same network could
produce many requests for IP addresses, straining the network. Devices
should revert to the proper IP addresses after the DHCP server resolves
the request.
If a system device continues to use an IP address that starts with 169, it
cannot communicate with other devices on the network.
Check each Deskset and Gateway to confirm that each has started up
properly. The Deskset screen similar to the one shown in Figure 29
displays. If any of the System devices report Sync Fail or a
Synchronizing for more than a few minutes, refer to
Deskset Into the System" on page 104
Into the System" on page 106
from these states.
31
"Reintroducing a
and "Reintroducing a Gateway
for probable causes and recovery methods