Installation guide

Synapse Installation Guide Back to Contents
Troubleshooting 102
Resolving General Audio Issues
Check the following if you hear static, sudden silences, gaps in speech, echoes, distorted
speech, or garbled speech.
To resolve general audio issues:
You may be experiencing network problems.
 Your LAN administrator should ensure the following minimum guidelines are met:
 A switched network topology, which requires attaching network components
to switches rather than hubs, is recommended. The network should use
standard 10/100 Ethernet switches that carry traffic at a nominal rate of
100 Mbit/s.
 The office network infrastructure should use Cat.-5 wiring.
 Do not connect a network server PC to the PC port on the Deskset.
If you have Digital Subscriber Line (DSL) service, you may be experiencing telephone line
problems.
 Make sure you have a DSL filter plugged in between each DSL line and the
telephone wall jack.
 You may need a higher quality DSL filter than you are currently using. You can
also try plugging in multiple DSL filters in sequence to decrease DSL interference.
 Move the DSL line to the lowest priority line, which is Line 4 on the highest
numbered PSTN Gateway, as indicated on the Gateway display.
The PSTN Gateway might not have recognized a new outside telephone line, so line
calibration — which allows the PSTN Gateway to adjust its performance depending on
the phone lines’ characteristics — did not occur. Recalibrate the line as described in
“Resolving Audio Echoes (PSTN Gateway)” on page 100, or manually recalibrate the line
by disconnecting the line from the Gateway. After unplugging the telephone line, wait
two full seconds for the LED to turn red before plugging the telephone line back into the
Gateway.
Reconnecting a Deskset to the System
If there are no more than 100 Desksets in the system and a Deskset screen displays
Synch Failed or Synchronizing for a long time, you may need to remove the Deskset
from the system and reconnect it. This problem may have been caused by a network
disruption, the Deskset having been part of a different network, or by an AC power failure.
To reconnect a Deskset into the system:
1. Ensure that the Deskset is connected to the same LAN subnet as other system
Gateways and Desksets. Ensure that the PC you will use to access the WebUI is either
on the same subnet as Synapse, or that the PC subnet can communicate with the
Synapse subnet. Devices on the same subnet generally share the first three octets of
their IP addresses. If the subnets are different, contact your installer.
2. If you want to retain the programming for a problem Deskset, back up the Deskset.