Sur-Gard System Five, Руководство по эксплуатации

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7.0 SG-DRL5/DRL5E/DRL5-2L PSTN Line Cards
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0x08 Not used
0x10 Not used
0x20 Not used
0x40 Not used
0x80 Not used
The programming of this option shall be displayed as individual options with a text label in the bit mask.|
SG-DRL5 Option 1B9/2B9: Noise/Fax Detection
Default (00)
This option will allow the receiver to perform line condition tests when the call is answered. There are two functions that are performed when a call is
received: Noise Detection, and Fax Detection.
To enable Noise/Fax and Fax Tone detection set the following:
Option bit value Setting
0000 0000 No noise or fax and tone detection
0000 0001 Noise/fax detection enabled
0000 0010 Fax tone detection enabled
0000 0011 Fax /noise and tone detection enabled
Noise/Fax Detection
This will occur during pre-init handshake duration (see Option 105/205) to perform the Fax/Noise test on the line. The DSP will require at least 150ms
to evaluate the line and determine if it is noisy or a fax transmission is occurring. Overall, one cycle of this will require at least 250ms duration. If the
pre-init handshake has not expired, the line card will perform the test again if it did not detect a Fax or Noise report. If a fax or Noise report was detected
the receiver will generate a communication fail fax or a communication fail noise message.
If Noise is detected the receiver will continue to proceed through its programmed handshakes and format detection. If no valid signal is received then the
receiver will log the call as a Communication Fail - Noise detected. If a valid signal is received (for example a SIA event) the signal will be processed as
normal and no fail log will be made.
Fax tone detection
This will occur in the common mode detection for formats. In this check, the line card is looking for the 1170 ON report from the DSP. Once in this
check, the line starts a 600 ms timer to check for the 1170 OFF report. If it sees the OFF report a valid fax tone is detected. If the line card does not
detect any other formats after the last handshake, it will generate a communication fail fax message. To avoid conflicting with other formats the sync bit
for SIA is checked. However, there is no way at the moment to distinguish from the modem II formats. At most the receiver will miss the first bytes of
modem, but once it detects modem, the second round is properly received.
There are four types of Communication Fail messages that can be created:
l
A message is generated if the line card receives an Invalid DNIS.
l
If the line card cycles through all programmed handshakes and no data is received in response.
Two new communication fail messages have been added to the communication fail automation and printer logs. These messages will occur in the event
that the following conditions occur.
l
If a fax signal is detected
l
If a Noise call is generated
Call could not be processed because of bad DNIS
structure or no response by the panel 001002[#0000|NYC0101] 01-002-0000--COMMUNICATION FAIL
Call failed due to detection of fax device on the call 001002[#0000|NYC0102] 01-002-0000--COMMUNICATION FAIL Fax
Call failed due to detection of voice on the call 001002[#0000|NYC0103] 01-002-0000--COMMUNICATION FAIL Noise
SG-DRL5 Option 1BA/2BA: DMP User Length
Default (00)
This option is for the variable length user and zone numbers. The first digit in the option represents the user number and the second digit represents the
zone number. For example, if Option 1BA/2BA is set for 24 then the receiver will output a 2-digit user number and a 4-digit zone number. The default