[asterisk-users] Busy (congestion) signal and cell phones
Hello, all! I've noticed a peculiar situation and I am hoping someone can shed some light on it for me. We have an Asterisk (1.4.18 ) box talking to the world via Zaptel on a PRI from a telco (USA). I have an extension that returns busy signal (fast-busy or regular busy) (using US tones). When I call from a landline or from another PBX, I get a busy signal, just like I expect. But when I call from a cell phone, the cell phone terminates the call as soon as connection is established. I've tested several cell phone models from different providers in the US. Same thing happens with calls coming from Gizmo. I manually changed the tones I send back (with Playtones) to mimic Austrian busy tone (picked the first one in the list from indications.conf) . Now, from the cell phone and Gizmo alike, I get busy tones. So, my questions is: why do cell phones and Gizmo both detect busy tones and terminate the call? Is that a standard behavior? Why don't landlines do that? Thank you in advance. Regards, Mark G. ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Busy (congestion) signal and cell phones
On Wed, 16 Apr 2008 08:40:42 -0500, Mark Gimelfarb [EMAIL PROTECTED] wrote: why do cell phones and Gizmo both detect busy tones and terminate the call? Is that a standard behavior? It *is* standard procedure for a cellphone to terminate a call immediately it discovers that the called number is busy. It will then, optionally, initiate its auto-redial function etc. Why don't landlines do that? Because back in the old days there were no intelligent electronics to tell the user that the call failed. A special busy tone had to be generated to inform the user that they should hang the receiver up manually. Some traditions die hard. -- Godwin Stewart - Horwich IT services ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Busy (congestion) signal and cell phones
What country are you in?? Yes, it is common for cell phones to disconnect the call if they receive CONGESTION, but not BUSY. Horwich IT Services (Godwin Stewart) wrote: It *is* standard procedure for a cellphone to terminate a call immediately it discovers that the called number is busy. It will then, optionally, initiate its auto-redial function etc. -- Consulting for Asterisk, Polycom, Sangoma, Digium, Cisco, LAN, WAN, QoS, T-1, PRI, Frame Relay, Linux, and network design. Based near Birmingham, AL. Now accepting clients worldwide. ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
[asterisk-users] Busy (congestion) signal and cell phones
I'm in the US, so I was originally using the US tones. Looks like I'm getting a disconnect with both CONGESTION and BUSY. In fact, I wasn't actually using Congestion() and Busy(), I just did Playtones() for both of those. There is no reason to send PRI messages to cell phones, is there? The way I understand, they do frequency interpretation on the incoming tones, just like analog lines do voltage variations. So, to test that, I Playtones()'ed (Pardon my DialPlan-ish dialect) Austrian busy tones--and the cell phone actually played tones back to me. So, to me that means that cell phones look for frequency sequences that they recognize. Now, here's an interesting observation. If I take an analog phone and take it off hook and then call that number from a cell phone, I do hear a busy tone. Is that because analog equipment doesn't generate the exact tone sequence due to analog limitations? This is in addition to my original question. Regards, Mark. What country are you in?? Yes, it is common for cell phones to disconnect the call if they receive CONGESTION, but not BUSY. Horwich IT Services (Godwin Stewart) wrote: It *is* standard procedure for a cellphone to terminate a call immediately it discovers that the called number is busy. It will then, optionally, initiate its auto-redial function etc. -- Consulting for Asterisk, Polycom, Sangoma, Digium, Cisco, LAN, WAN, QoS, T-1, PRI, Frame Relay, Linux, and network design. Based near Birmingham, AL. Now accepting clients worldwide. ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
