ProntoNetLC User Manual
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The Law is selected automatically, depending on the ISDN protocol selected
– A Law for Euro ISDN and U-Law for all others.
VI.9.3 Restrictions in ISDN communications
As we have already stated, ProntoNetLC can work as a DUAL CODEC over ISDN,
meaning it can operate with two independent lines. However, this is only
possible when two MONO communications are used. The use of Dual, Joint
Stereo or Stereo modes creates certain restrictions on the system that are in
place to avoid conflicting situations.
1. DUAL, JOINT STEREO or STEREO modes are only available on Encoder 1.
2. When Encoder 1 is configured to DUAL, JOINT STEREO or STEREO, Encoder
2 is not available.
3. ProntoNetLC will connect the line but the audio will not be decoded
in the following cases:
a. The line 2 is connected and the Decoder 2 is FRAMED. ProntoNetLC
receives a call in the line 1 and detects that the audio is encoded in DUAL,
JOINT STEREO or STEREO mode at 64 Kbps.
Line 1 will connect but the audio will not be decoded since ProntoNetLC
working as a DUAL CODEC only allows two MONO communications. The
display shows an error code to indicate the situation.
b. ProntoNetLC receives a call in the line 2 and detects that the audio is
encoded in DUAL, JOINT STEREO or STEREO mode at 64 Kbps.
Line 2 will connect but the audio will still not be decoded since these
modes are not allowed on Line 2. The display shows an error code to
indicate the situation.
c. The line 1 is connected and the Decoder 1 is FRAMED in DUAL, JOINT
STEREO or STEREO mode at 64 Kbps. ProntoNetLC receives a call in the
line 2.
Line 2 will connect but the audio will still not be decoded since these
modes are not allowed on Line 2. The display shows “STOP” to indicate
the situation.
L 1
C O N N E C T E D F R A M E D
L 2
C O N N E C T E D S T O P
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