User`s guide

DPH-70 User’s Guide
12
will play a ring-back tone. However, if the Internet access line is busy, the DPH-70 will retry 5
times before giving up.
During the process of making contact, the DPH-70 will play different call-progress tones (such as
progress, ring-back, or error tone) and cause the speaker LED to blink. After establishing contact,
it will play the ring-back tone and turn on the speaker LED. You can listen to call-progress tones
in the one-hand dialing mode, but you must use the handset to talk to the other party.
Warning:
DPH-70 identifies the end of a phone number by ‘#’. Please terminate phone number
entry into DPH-70 by pressing the ‘#’ key. If you don’t press any key for more than 5 sec, DPH-70
identifies it as the end of a phone number.
4.2 Receiving Internet Calls
The DPH-70 must be connected to a VoIP server to receive phone calls. This is called RECEIVE
state. DIAL UP button enables and disables this state and the corresponding Dial-Up LED
indicates whether the DPH-70 is in the receive state. This button is operational even while using
the phone.
When you press the DIAL UP button, DPH-70 connects to the Internet and VoIP (Internet
Telephone) Service Provider. During this connection process, the phone will play the progress
tone and blink the DIAL UP LED. After connecting to the VoIP server, it will turn on the DIAL UP
LED and stop progress tone. It stays connected to the Internet for 15 minutes or until you cancel
it by pressing the DIAL UP button again.
If anything fails during this connection process, the DPH-70 will disconnect the modem, turn off
the Dial-Up LED, play an error message, and then revert to idle state. If the Internet access line is
busy it will retry 4 times before giving up.
Warning: In RECEIVE state, the DPH-70 is continuously connected to the Internet and you will
be charged for Internet access. Do not leave the phone in RECEIVE mode unless you are
expecting an Internet phone call.
4.3 Transferring Internet calls
The SIP signaling protocol in DPH-70 supports a call-transfer feature. This feature is not available
in H.323 signaling protocol.
This feature allows the user to transfer an Internet phone call to another phone connected to the
Internet. As with a conventional phone, you can transfer the call to another party. You flash the
hook switch (that means go on-hook and off-hook quickly), dial the phone number (terminated by
‘#’). The destination number will ring and on hanging up the phone, the call will be transferred to
the other party.
5 PSTN Phone Calls
DPH-70 can make and receive normal PSTN phone calls. When DPH-70 is not connected to the
Internet through the DIAL-UP button (RECEIVE state), it is known to be in idle state. In this state
it works as a normal phone, making and receiving PSTN phone calls. This feature does not need
any configuration.