4RF Aprisa XE User Manual - page 127
Configuring the Traffic Interfaces | 125
Aprisa XE User Manual
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
Default
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
Default
> 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)
Default
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).