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© Tieline Research Pty. Ltd. 2020
Genie Distribution WNET Manual v3
downloaded from the network locally (i.e. audio data is being sent by the remote codec).
Conversely, the Send LQ reading represents the audio data being sent by the local codec (i.e.
being downloaded by the remote codec). To ensure a stable connection, try to maintain a
reliable reading of 80 or higher for both the
Send and Return LQ reading.
Important Note:
· The Return link quality reading is the same as the Local ( L ) setting displayed on a
G3 codec.
· The Send link quality reading is the same as the Remote ( R ) setting displayed on a
G3 codec.
Diagnosing Port Blocking via the Studio Codec LQ
If the studio codec Return LQ reading is 01 then incoming audio from the remote codec is being
blocked by a firewall at either point A or B in the following diagram. If the studio codec Send LQ
reading is 01 then outgoing audio from the studio is being blocked by a firewall at either point C
or D in the following diagram.
Diagnosing Port Blocking via the Remote Codec LQ
If you attach your Tieline codec at the remote site to a LAN with access to the internet you can
often dial and connect to the studio without any problem. It is less likely that a firewall will block
outgoing TCP and UDP ports. However, if there is a firewall at the remote site it may block
incoming data packets from the studio.
The principle is the same at the remote codec for diagnosing blocked ports. If the remote codec
Return LQ reading is 01 then incoming audio from the studio codec is being blocked by a
firewall at either point C or D in the preceding diagram. If the remote codec Send LQ reading is
01 then the outgoing audio from the remote codec is being blocked by a firewall at either point A
or B in the preceding diagram.
Troubleshooting TCP Port Blocking
Error messages on the codec screen can help to diagnose TCP port blocking.
1. "Connection Refused" usually means that the firewall is configured correctly but the
codec is not using the expected port. For example, the firewall is set up to forward via
port 9002 but codec is 'listening' to port 10,000. “Connection Refused” is not normally
shown if the firewall is not configured correctly because a firewall will by design silently
drop any forwarding requests to ports that it doesn’t have open (see next point). Note:
"Connection Refused" will also be displayed if the Commander G3 or i-Mix G3 codec
you are calling is already connected.
2. “Connection Timeout” can mean one of two things:
· The firewall is not configured correctly and the attempted codec connection is being
silently dropped, e.g. a remote codec is dialing to port 9002 but the studio firewall
port forwarding is not configured.
· The UDP port is not port forwarded correctly. Tieline codecs send test data during
connection establishment to make sure that the audio path is configured correctly;
if this process fails then it will also result in a “Connection Timeout”.