Section 12: GSM Operation
T
ieline
Page 94
T E C H N O L O G Y
12.7.
Configuring a POTS Landline Codec for GSM Connections
If you are dialing a GSM-connected codec via a POTS landline connection, then
you need configure the POTS-connected codec specifically for this purpose. A
POTS landline-connected codec must be in GSM Landline Mode to receive a
GSM call.
12.7.1.
Recommended Settings
The easiest way to do this is to use the POTS connection wizard. To enable
GSM landline-mode via the wizard, use the
MENU SELECTOR
to select the
POTS connection on the codec
LCD
screen that you are connecting with.
Next press
SOFTKEY 3 Wiz
to use the connection wizard. Select
OK
in the
wizard to proceed and then ensure the following wizard settings are selected:
[Pots Wizard
→
Setup GSM Landline
←
] > [Algorithm
→
Voice G3
←
] >
[GSM Landline Rate
→
9600
←
] > [Pre-buffer Secs
→
0
←
] > [Auto Reconnect
→
Disable
←
].
Please Note:
Initially set the
Pre-Buffer Secs
for GSM connections to
0
and adjust the
setting if required. (Related topics: GSM Pre Buf Seconds and GSM Landline
Pre Buf Seconds).
Use the
Voice G3
algorithm if you are connecting in CSD mode and select
either
Voice G3
or
Music
if you are connecting via HSCSD (depending on
what bit rate you are able to achieve over your connection). Use
Music
for
28,800 bps connections).
Set
Auto Reconnect
to
Enable
if you want a codec to redial a connection if it
drops out. With this enabled a codec can automatically redial until a link is re-
established. See the Auto Reconnect section in this reference manual for
more info.
If you are having trouble connecting, please see the GSM Troubleshooting
section in this reference manual. If you do this and find you are still having
difficulties, contact
T
ieline
Technology to find out more, or to locate your
nearest support and upgrade office. We have support and upgrade offices in
the USA, England, Netherlands, Singapore and Australia.
12.7.2.
GSM Transparent and Non-transparent Data Modes
If you are using a GSM connection, we recommend you ensure that your SIM
card has been set to send data in non-transparent mode. Check this with your
telco when you order your data service. (Some cell-phone networks only
provide non-transparent data capabilities). When transparent mode is used,
the bit error rate could be as high as 1/1000. This will lead to dropouts in
audio.
