Zultys ZIP2, User Manual

Page: 49 / 98

7. Using the Phone
41
7.3.1.1 ZIP2 to SIP Phone Calls or ZIP2 to ISDN Calls
When you call another SIP phone, the ringback that you hear is generated by your phone. This
tone is determined by the country setting that you selected when you provisioned the phone.
1
If you are making a call to the PSTN, the SIP to PSTN gateway normally opens the
communication path so that you hear the sound coming from the network. Therefore, if you are
calling a different country you will hear the ringback tone from that country. This tone may be
different from that used in your country.
7.3.1.2 ZIP2 to CAS Calls
If you are connected to the PSTN using CAS circuits, your SIP to PSTN gateway may not know
the status of the connection. It may open the speech path even though there is no ringback.
The phone behaves as if the call has been established as described in section 7.5 on page 43.
Because the speech path is open, you may hear busy tone.
7.3.2 Far End Busy
If the person you are calling is busy, the phone either plays the busy tone for your country or the
busy tone that is generated by the phone network at the far end. This depends whether your
server has indication that the called party is busy or not.
7.3.3 Network Busy
If the network is busy, the phone either plays the fast busy tone (congestion tone) for your
country or the fast busy tone that is generated by the phone network at the far end. This depends
whether your server can detect whether or not the network is busy. The phone maintains this
state until you go on hook.
7.3.4 Dialling an Invalid Destination
When you dial an invalid number, the phone plays the fast busy tone (congestion tone). The
phone maintains this state until you go on hook.
7.4 Receiving a Call
7.4.1 LED Indication of Ringing
When the phone receives an incoming call, the red LED above the keypad will flash red during
the audible portion of the ring and turn off during the silent portion of the ring.
1. See section 9.4.8 on page 122 for details on how you select the country setting.