Tieline i-Mix G3, Основное руководство по эксплуатации, Страница: 71 / 355

Section 8: POTS Operation and Usage Tips
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Page 71
T E C H N O L O G Y
maximum of 28,800bps (depending on modem handshaking). The codec will
then renegotiate the link downwards to the highest possible bit rate where
line quality is greater than 70%.
8.11.4. Dialing from a POTS G3 Module to a POTS G3 Module
When initially connecting to another POTS G3 module, T
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POTS G3
modules will initially attempt to establish a connection at 28,800 bps. The
codec will then renegotiate the link downwards to the highest possible bit rate
where line quality is greater than 70%.
Very Important Renegotiation Note:
After initially connecting, if you attempt to shift the connection bit-rate
upwards locally with a POTS G3 module, the codec will ‘retrain’ upwards, not
renegotiate like the original POTS modules. Retraining takes significantly
longer than renegotiation – up to 30 seconds.
Connection Tip:
If you are connecting a POTS module to a new POTS G3 module, use the
POTS module in the local codec. This will allow you to renegotiate the
connection upwards seamlessly if required, without the delay of retraining.
8.11.5. Dialing from a POTS Module to a POTS or POTS G3 Module
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POTS modules initially attempt to establish a link at 19,200 bps. They
will then renegotiate the link to the highest possible bit rate, either up or
down.
The codec modem can also be set for
Quick Negotiation
in the main codec
POTS menu, which will more quickly negotiate a connection at the codec bit
rate setting within this menu.
Once the connection process has
completed, the main connection
screen will be displayed. The bit-
rate of the connection and the
Line Quality of both codecs will be
displayed.
8.12. Summary:
It is always preferable to obtain a dedicated POTS phone line from the Local
Exchange or Central Office, nothing is better than keeping it simple. The simpler
the installation the less there is to go wrong, and the quicker faults can be
rectified. It is common sense, not rocket science.
If you have any doubt about a line being a digital or analog line, plug your own
normal phone into the line first. If the phone works correctly, the line is a POTS
line. If the phone does not work correctly, something is not quite right and further
investigation is required.
ManDflt MonoPgm
POTS1^ Enter#
[POTS2> 28.8 L91R89]
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