4RF Aprisa XE User Manual page 127

12. Select the DFXO On Hook Speed.
This option sets the slope of the transition between off-hook and on-hook.
Selection Description
< 500 μs Off-hook to on-hook slope of < 500 μs
3 ms Off-hook to on-hook slope of 3 ms ± 10% that meets ETSI standard
25 ms Off-hook to on-hook slope of 25 ms± 10% used to reduce transient
interference in copper cable
13. Select the DFXO ringer Impedance.
This option sets the DFXO ringing input impedance as seen by a sine wave ringing signal applied to the
DFXO 2 wire port at the frequency of ringing.
Selection Description
> 1 M DFXO input impedance to ringing of > 1 M
> 12 kΩ DFXO input impedance to ringing of > 12 kΩ
14. Select the DFXO ringer Detection Threshold.
This option sets the DFXO ringing detect threshold.
Selection Description
16 Vrms DFXO detects ringing voltages of 16 Vrms or greater (does not
detect ringing below 13 Vrms)
26 Vrms DFXO detects ringing voltages of 26 Vrms or greater (does not
detect ringing below 19 Vrms)
49 Vrms DFXO detects ringing voltages of 49 Vrms or greater (does not
detect ringing below 40 Vrms)
It is recommended that the ringer Detection Threshold be set to 49 Vrms if a DFXO ringer impedance
of > 12 kΩ is selected.
Note: The Signalling Mode is set in the Cross Connections application (see page 171).
Aprisa XE User Manual
Configuring the Traffic Interfaces | 125
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