b. Pick up the handset from the base or charger unit (Only if Auto Talk option is activated).
To finish the call, press or place the handset in the base or the charger unit.
Note:
-You can switch off the ringer temporarily by pressing Silent Soft key.
-When you receive a call the Handset will automatically sync up the date and time from the base station.
-Due to the channal limitation, DP715 can support at most 4 simutianous calls at the same time. If using PBX ring group function to ring 5 different accounts for 5 handsets, the 5th handset will not ring. Please use DP715 hunting group function instead.
INTERNAL CALLS
In some cases a user may want to make phone calls between the handsets registered to the same DP715 Base Station when it is used as a standalone unit, without the use of a SIP server. This feature will also be applicable when the DP715 Base Station is used with Hunting Groups and is registered to SIP server only with one master number. In such cases users still will be able to make internal calls by following these steps:
1.Press INT.
2.Internal appears in the display.
3.Select the number of the handset (keys
4.When you have completed your call, press to hang up.
Note:Both Handsets should be registered to the same DP715 Base station.
DIRECT IP CALLS
Direct IP calling allows two parties, that is, a Handset and another VoIP Device, to talk to each other in an ad hoc fashion without a SIP proxy.
Elements necessary to complete a Direct IP Call:
1.Both DP715 and other VoIP Device, have public IP addresses, or
2.Both DP715 and other VoIP Device are on the same LAN using private IP addresses, or
3.Both DP715 and other VoIP Device can be connected through a router using public or private IP addresses (with necessary port forwarding or DMZ).
DP715 supports two ways to make Direct IP Calling:
Using IVR
1.Pick up the Handset and press 
then access the voice menu prompt by dial “***”
2.Dial “47” to access the direct IP call menu
3.Enter the IP address after the dial tone and voice prompt “Direct IP Calling”
Firmware version 1.0.0.23 | DP715/DP710 User Manual | Page 30 of 52 |