Reference10:Interfaces/FXS/Advanced: Difference between revisions
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|valign=top nowrap=true|'''Loop length''' | |valign=top nowrap=true|'''Loop length''' | ||
|Loop length can be set to 'low' for 500ft/155m or 'high' for 5000ft/1550m. | |present on ip28 gateways only<br> | ||
Loop length can be set to 'low' for 500ft/155m or 'high' for 5000ft/1550m. | |||
Checking this topic to 'high' decreases ring-trip threshold by 20% so that off-hook detection becomes more sensitive. | Checking this topic to 'high' decreases ring-trip threshold by 20% so that off-hook detection becomes more sensitive. | ||
|- | |||
|valign=top nowrap=true|'''RingTrip Threshold''' | |||
|present on ip22/24/302/305 gateways only<br> | |||
Ring-Trip threshold can be adjusted using an absolute value in milliamperes. | |||
|- | |||
|valign=top nowrap=true|'''Loop Current''' | |||
|present on ip22/24/302/305 gateways only<br> | |||
Loop current can be adjusted using an absolute value in milliamperes. | |||
|} | |} | ||
Revision as of 17:32, 4 September 2013
The advanced settings of the analogue interfaces can be made here:
Optimization grade: | As per default the TEL ports are optimized for low power consumption (Optimization 'high' and 'mid'). This decreases the usual on-hook supply voltage of 48V down to 24V. Most conventional phones and faxes can deal with this. In case a special phone is connected that cannot deal with this low voltage this dropdown can be modified. 'high' and 'mid' both set 24V on-hook voltage. The off-hook loop current is set to 20mA. 'low' sets 48V on-hook-voltage. |
Ringing Voltage | This topic modifies the ringing voltage used for ringing. Ringing frequency is 25Hz. 'low' sets 65Vpk/45Vrms, 'mid' sets 68Vpk/48Vrms and 'high' sets 70Vpk/49,5Vrms AC. |
Loop length | present on ip28 gateways only Loop length can be set to 'low' for 500ft/155m or 'high' for 5000ft/1550m. Checking this topic to 'high' decreases ring-trip threshold by 20% so that off-hook detection becomes more sensitive. |
RingTrip Threshold | present on ip22/24/302/305 gateways only Ring-Trip threshold can be adjusted using an absolute value in milliamperes. |
Loop Current | present on ip22/24/302/305 gateways only Loop current can be adjusted using an absolute value in milliamperes. |
Note: there is no difference between PoE and PSU powering of the IP2x.
For possible line lengths, see Maximum wire length.