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GeneralRe: Summer of discovery. More (preliminary) neat stuff to keep an eye on Pin
jmaida6-Aug-23 19:34
jmaida6-Aug-23 19:34 
GeneralRe: Summer of discovery. More (preliminary) neat stuff to keep an eye on Pin
RickZeeland6-Aug-23 20:56
mveRickZeeland6-Aug-23 20:56 
GeneralRe: Summer of discovery. More (preliminary) neat stuff to keep an eye on Pin
BernardIE53177-Aug-23 3:41
BernardIE53177-Aug-23 3:41 
GeneralRe: Summer of discovery. More (preliminary) neat stuff to keep an eye on Pin
Richard Andrew x647-Aug-23 7:48
professionalRichard Andrew x647-Aug-23 7:48 
GeneralRe: Summer of discovery. More (preliminary) neat stuff to keep an eye on Pin
BernardIE53177-Aug-23 8:01
BernardIE53177-Aug-23 8:01 
GeneralRe: Summer of discovery. More (preliminary) neat stuff to keep an eye on Pin
Richard Andrew x6420-Aug-23 7:48
professionalRichard Andrew x6420-Aug-23 7:48 
Generalworldle 562 1/6 Pin
jmaida6-Aug-23 13:42
jmaida6-Aug-23 13:42 
GeneralMobile (GSM, 4G/5G) subadressing Pin
trønderen6-Aug-23 9:37
trønderen6-Aug-23 9:37 
Any phone experts around?

In ISDN, the subscriber could distribute incoming calls on the subaddress: 2345678#1 could go to his fax machine, 2345678#2 to the PC, 2345678#3 to his teenage daughter's phone, and so on. All ISDN phone. This "routing" was done on subscriber premises, the network wasn't at all, except by carrying a # and numeric subaddress in the destination field. (In private homes, the "routing" was usually as simple as having the different devices set up to answer calls only if their subaddress was included with the number - all the devices listned to the same bus.)

I never saw much use of this. I tested that it worked, but never put it to any use - mostly because 95% of potential callers responded with "Say what??" when I told them that they cold go directly to, say, my daughter's phone by appending #3 to our phone number.

I never studied GSM/smartphone protocols and specifications, so I ask those who did: Do the protocols we use for mobile phones today have a similar subaddress mechanism? If it is defined, but optional: Is is commonly supported?

Usually, a mobile phone doesn't provide a bus connecting various devices, so my suggested use is another: If you have a 'switchboard' owning the subscriber number (2345678), and a large number of internet SIP devices, without traditional phone functionality: The switchboard could maintain a mapping between subaddress and SIP address, and forward incoming calls to the proper SIP address. It would work even if the called party is out of office, but with a SIP device (say, a portable PC with SIP software) in reach of a WiFi network.

The problem with IP telephony is that you can't tell your contacts 'Call me on number so-and-so'. Today, all land lines (in this country, Norway) are really IP phones, the old phone network is completely torn down. They do a phone number to SIP address mapping, but they won't give you access to the SIP protocol. All you get access to is POTS analog interface that can handle a 1930 vintage phone. You can set up your own SIP phone network, but then you have no interworking with neither POTS, ISDN or cellular networks. If we could use subadressing for the devices in the SIP network, you wouldn't need a separate phone subscription and physical interworking device for each SIP device in the network.
GeneralRe: Mobile (GSM, 4G/5G) subadressing Pin
Daniel Pfeffer6-Aug-23 18:42
professionalDaniel Pfeffer6-Aug-23 18:42 
GeneralRe: Mobile (GSM, 4G/5G) subadressing Pin
trønderen7-Aug-23 9:19
trønderen7-Aug-23 9:19 
GeneralWhat's your font? Pin
Gerry Schmitz6-Aug-23 7:27
mveGerry Schmitz6-Aug-23 7:27 
GeneralRe: What's your font? Pin
PIEBALDconsult6-Aug-23 7:30
mvePIEBALDconsult6-Aug-23 7:30 
GeneralRe: What's your font? Pin
Richard Andrew x646-Aug-23 8:07
professionalRichard Andrew x646-Aug-23 8:07 
GeneralRe: What's your font? Pin
Rick York6-Aug-23 8:10
mveRick York6-Aug-23 8:10 
GeneralRe: What's your font? Pin
OriginalGriff6-Aug-23 9:15
mveOriginalGriff6-Aug-23 9:15 
GeneralRe: What's your font? Pin
Richard Andrew x646-Aug-23 9:44
professionalRichard Andrew x646-Aug-23 9:44 
GeneralRe: What's your font? Pin
Andre Oosthuizen6-Aug-23 22:48
mveAndre Oosthuizen6-Aug-23 22:48 
GeneralRe: What's your font? Pin
OriginalGriff7-Aug-23 0:08
mveOriginalGriff7-Aug-23 0:08 
GeneralRe: What's your font? Pin
bryanren7-Aug-23 6:49
bryanren7-Aug-23 6:49 
GeneralRe: What's your font? Pin
Slacker0076-Aug-23 10:07
professionalSlacker0076-Aug-23 10:07 
GeneralRe: What's your font? Pin
pmauriks6-Aug-23 20:51
pmauriks6-Aug-23 20:51 
GeneralRe: What's your font? Pin
Lorenzo Bertolino6-Aug-23 21:53
professionalLorenzo Bertolino6-Aug-23 21:53 
GeneralRe: What's your font? Pin
Mircea Neacsu7-Aug-23 3:36
Mircea Neacsu7-Aug-23 3:36 
GeneralRe: What's your font? Pin
BernardIE53177-Aug-23 3:50
BernardIE53177-Aug-23 3:50 
GeneralRe: What's your font? Pin
Gerry Schmitz7-Aug-23 4:29
mveGerry Schmitz7-Aug-23 4:29 

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