Choppy / Broken Transmit and Receive

[BBMS]

My company uses Team Speak for business meetings with 30-40 participants. We have encountered an identical problem in two ways.

1) When client A speaks every other client on the channel receives his transmission choppy broken and he can’t be understood. Even though client A holds his Push To Talk button down the other clients see his transmit light flicker on and off intermittently. Client A can hear all other clients clearly.

2) When client B speaks all other clients can hear him clearly but he receives all other clients in the same choppy, broken manner as client A.

The Team Speak server is running on a P4 1.4GHz computer with 512MB of RAM.

We have tried the following:
-Using different codices. (CLEP, GSM, Speex)
-Ensuring headset speaker works properly
-Recording voice on computer. (Records clearly)
-Reloading / updating soundcard drivers
-Switching between Wave and Direct Sound
-Using Force 8 bit recording
-Changing the Direct Sound Buffer size to Lower latency
-Ensuring input and output devices are set to computers sound card
-All sound notifications are off
-Placing Process Priority on High followed by program restart
-Attempting to communicate with only 2 clients on the server
-Rebooting the server

[Timeless]

Choppy sounds is caused by a worse network connection.
because:
1.
It´s a bad Inet connection which is unstable, or has no up/download reserves.
2.
If you use in a LAN environment:
the critical load is reached

What kind of connection do the server & the clients use?
(up/download capacity)
What´s the packetloss and ping of the "choppy" users?

[BBMS]

The clients and server are resident at several different locations with a satellite link between them with up to 17 Mbps transfer rate.

Why would poor network connection affect upstream butnot downstream traffic? Also why would it not affect any of the other clients using the same satellite?

Latency from the TS server to the problematic client is between 5 and 50 ms with 96% through put.

[Timeless]

Depending on the satellite connection, the upload might be unsufficient.
As far as I know download speed is quite good (as you said 17 MBit), but upload is limited by ISDN or modem speed (56 or 64/128 kbit).
I would suggest a lower codec (speex 12, or GSM) or to use channelbundleing for ISDN users (if possible).

[WalkaboutTigger]

I, too, would suggest reducing the codec. Broken transmission and reception can be caused by a number of factors including:

Packet loss
Latency (Satellite suffer this the most)
Inappropriate MTU for carrier (DSL and Satellite suffer this the most)
Network contention
Router queueing
IP Application QoS incorrectly configured
Electromagnetic Interference at network
Electromagnetic Interference at power (power transients caused by inductive loads typically)
Low SNR
Atmospheric interference
Failing equipment
Incorrectly sized server
Trojans, worms, viruses, malware, spyware stealing bandwidth
Excessive collisions
Excessive nodes in a collision domain
Overloaded switches
Inappropriate design of infrastructure (typically in a cascaded switch environment)
Too many routers or hops between end-points and server

and many other sources. These are the most likely, in my estimate, in your environment.

[BBMS]

The satellite system we are using is a government system and we have full control of it. Both upload and download are 17Mbps. Also other clients use the same satellite and have no problems.

We are currently using Speex 9.3.

Network latency though doesn't explain why only the upstream transmission is affected. Or in the second case why only the downstream transmission is affected.

[Timeless]

Have you read this?:
http://forum.goteamspeak.com/showthread.php?t=24046&highlight=satelite

Has your upload the same capacity as download?

[sydbod]

Hi all,

This type of problem usually occures when the client does not have enough bandwidth available for either upload or download.
It can be caused due to a poor internet connection or it may also be caused by how the client set up his version of Team Speak.

Have the client look into "Settings"->"Options" then select the "bandwidth"tab.
Make sure upload value and download value are set to unlimited. If things now work OK then the client was being artificially limited by these settings.( this is usually the most common cause for the problem described).


Regards sydbod :) :) :)