The modes selected by these two menu's are as follows:

NORMAL:96K

The normal IDR overhead is used

1XAUDIO:64K

The overhead is reduced to 64kbps, the 32kbps defined for Audio ESC channel

 

2 is not transmitted. The 32kbps for [FAS + Back Alarms + 8K sync ESC channel],

 

and Audio ESC channel 1 are still transmitted.

NO AUDIO:32K

The overhead is reduced to 32kbps, both 32kbps channels defined for ESC audio

 

are not transmitted. The 32kbps for [FAS + Back Alarms + 8K sync ESC channel]

 

alone is transmitted.

16k Modes

 

96K

Both Audio ESC channels operate in 16kbps ADPCM mode allowing both audio

 

ESC's to fit into 32kbps. The 32kbps for [FAS + Back Alarms + 8K sync ESC

 

channel] is transmitted first, followed by 32kbps defined for Audio ESC 1, now

 

containing both Audio ESCs 1 & 2 using 16kbps ADPCM. These are followed

 

by the 32kbps for Audio ESC channel 2 which is unused and may be defined

 

for use by the Aux port providing either a spare 32kbps for external BER testing,

 

or for the use of the internal BER Tester (in both cases for possible traffic quality

 

monitoring).

64K

Both Audio ESC channels operate in 16kbps ADPCM mode allowing both Audio

 

ESC's to fit into the 32kbps allocated to audio ESC channel 1. The overhead is

 

64kbps comprising 32kbps for [FAS + Back Alarms + 8K sync ESC channel] plus

 

32kbps containing the two 16kbps ADPCM audio channels. The final 32kbps

 

defined for Audio ESC channel 2 is not transmitted.

P300H

P300 Series Modem Installation and Operating Handbook

Page 136

Page 136
Image 136
Paradise P300 specifications NORMAL96K, 1XAUDIO64K, No AUDIO32K, 16k Modes