Section 39: Troubleshooting Tips
T
ieline
Page 345
T E C H N O L O G Y
39.3.
GSM Troubleshooting
VERY IMPORTANT WARNING:
GSM plug-in modules cannot be used in TLR300B
COMMANDER
G
3
rack unit
codecs. If you must connect using GSM with aTLR300B
COMMANDER
G
3
rack
unit codec, we suggest you use a GSM cell-phone attached to the RS232 port on
the rear panel of the codec. Alternatively, you could try a GSM phone or a 3G
cell-phone in GSM mode with a
T
ieline
USB module.
Following are some troubleshooting tips if you are having trouble with your GSM
connection:
1.
Use the balanced inputs and outputs where possible to minimize the
likelihood of cell-phone interference.
2.
Attach the male to female antenna adaptor to your GSM module. This
adapter is provided with the antenna kit when you purchase a GSM
module from
T
ieline
. If you don’t use the adapter, connections could be
unreliable and audio problems may be introduced.
3.
If you are dialing from the landline connected codec, check that you are
dialing the special GSM data number and not the standard GSM voice
number. You may have to purchase this data number from your telco.
Most telco’s have a data number that is separate to the standard voice
number. You can get the data number by calling your telco and
requesting it.
4.
If you are having problems with dialing from the landline side, but you are
successful dialing from your cell-phone to the landline connected codec, it
could be that your GSM data number has been set up in ‘Transparent’
mode. Ring up your telco and change over to ‘Non-transparent’ mode
(Related topic: GSM Transparent and Non-transparent Data Modes).
5.
If you encounter audio drop-outs try increasing the pre-buffer second
setting. If you adjust this while you are connected, the settings will only
take effect when you next try to connect. In other words, you must hang
up and redial the connection.
39.4.
3G Troubleshooting
Consult the “IP and 3G Streaming Reference Manual” for detailed
troubleshooting and connection information.
39.5.
IP Troubleshooting
Please check our website regularly for updates to the IP knowledge base at
www.tieline.com/IP . Consult the “IP and 3G Streaming Reference Manual” for
detailed troubleshooting and connection information.