DCB AVA-E, Руководство пользователя

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Parity Considerations
AVA-Es transfer all character bits whether it is 7 data bits plus parity or 8 data bits plus none, even or odd
parity (7,N,1 is not supported). All 7 bit plus parity data should use the 8N1 setting. When 8E1 or 8O1 is
enabled, parity is tested on the incoming data port characters, and the character is discarded if the parity is
incorrect.
Voice Bandwidth Requirements
The following chart shows the bandwidth required for each voice rate setting. The maximum sustained data
bandwidth is the network rate minus voice bandwidth.
Voice Rate
(bps)
Bandwidth Required
(bps)
Minimum Network
Rate (bps)
2250 4375 4800
2400 4375 4800
3600 5875 9600
4800 7375 9600
6400 9375 9600
8000 11375 19200
9600 13375 19200
ADPCM
(32K)
45500 57600
PCM (64K) 84500 115200
Voice Settings
Select the proper voice channel settings for your application based on the following chart. The voice
interface is selected by the CV command and/or internal jumper settings.
Equipment Voice Interface
Local Remote Local Remote
Analog Phone
1
Analog Phone
1
FXS
2
FXS
Analog PBX Ext. Analog Phone FXO
3
FXS
Analog PBX Ext. Key System FXO FXS
Key System Analog Phone FXS FXS
Key System Key System FXS FXS
Analog Phone Line Analog Phone FXO FXS
PBX 4-wire tie line PBX 4-wire tie line E&M E&M
PTT Microphone Speaker MIC-PTT E&M 4
1 – Digital or “feature” phones of the type used by some PBX systems are not supported.
2 – To set the FXS/FXO port for FXS, set the jumper on J6 to the left.
3 – To set the FXS/FXO port for FXO, set the jumper on J6 to the right.
4 – Set internal jumper J4 to position 2,3 to route audio output to rear panel audio connector.
FXS – In this mode, the AVA-E provides DC voltage and current (talk battery) for a local telephone
instrument. By monitoring the presence or absence of current to the telephone instrument, the AVA-E detects
whether the phone, or telephone equivalent, is idle (on hook) or busy (off hook). This information is then
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