Administrator’s Guide
Modem Statistics
In the Modem Statistics portion of the Diagnostics section, you can view the SoundStation VTX 1000 modem performance for the last call that made use of a modem connection.
Monitoring Line Quality
TX Bit Rate | 28800 |
RX Bit Rate | 28800 |
SNR | +18 |
Round Trip Delay | 30 |
CRC Errors | 0 |
The statistics provided are:
Tx Bit Rate (Transmit Bit Rate) The achievable rate for sending data over a given phone line with the modem, in bits per second
Monitoring Line Quality
VTX 1000 provides
1. “Line Quality Standby”
This will be displayed if the prior phone call did not use the modem. (i.e. narrow band).
2. “Monitoring Line Quality”
This is displayed during a wideband call.
3. “Narrowband Select on Poor Sync”
This will be displayed if the local
6. “Narrowband Select on CRC Level 3”
This will be displayed if the unit detects a 40% or greater CRC Error Rate consistently at our local receiver for 6 seconds.
7. “Narrowband Select on CRC Level | Guide | |
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4” | Administrator’s | |
This will be displayed if the unit detects | ||
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an 80 % or greater CRC Error Rate |
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consistently at our local receiver for 3 |
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seconds. |
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8. “Wideband Signal Loss Detected” |
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This will be displayed if the remote |
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VTX 1000 shut off wideband. This will |
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also be displayed if the remote side |
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hangs up. |
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SoundStation VTX 1000 Operation Manual
Rx Bit Rate (Receive Bit Rate) The achievable rate for receiving data over a given phone line with the modem, in bits per second
SNR (Signal to Noise Ratio)
A measure, in microvolts, of signal strength relative to background noise as expressed in decibels
Round Trip Delay
The elapsed round trip time for transit of a signal over the analog telephone circuit
CRC Errors
(Cyclical Redundancy Check Errors) The cumulative number of lost data packets, a good measure of the robustness of the data connection
VTX 1000 decided to fall to Narrowband because it believed the modem had lost sync due to detected errors in V.34’s so called superframe bit inversion synchronization pattern.
4.“Narrowband Select on CRC Level 1”
This will be displayed if the unit detects a 15% or greater CRC Error Rate consistently at our local receiver for 60 seconds.
5.“Narrowband Select on CRC Level 2”
This will be displayed if we detect a 20% or greater CRC Error Rate consistently at our local receiver for 6 seconds.
Restore All Defaults
When you select Restore Defaults, you will be prompted to confirm or cancel the complete elimination of all settings and data that have been entered since the phone was first installed.
Important: If you Restore Defaults, all data entered since the phone was first installed, including, but not limited to, all Settings, Audio Setup entries, Administrative Setup passcode and data, etc., is irretrievably lost.
Note: Phone Book entries and Speed Dial numbers are not lost when restoring all defaults.
Press the OK soft key to confirm that you wish to Restore Defaults, or the CANCEL soft key to return to the Diagnostics submenu without restoring defaults.
SoundStation VTX 1000 Operation Manual
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