New service request. Block non-caller-id calls - Page 2

jonifen · 30-04-2005, 00:04

Quote:

Originally Posted by Raistlin

Good idea, but that only blocks calls where the caller has witheld their number.

Many of these calls simply don't have the number forwarded, which is a totally different kettle of fish.

When we have it enabled on our phones, my mate cant phone us from his work (he works in a hospital) and I cant phone home from my work (I work at Woolies). Both places dont withhold the number, but rather "the number is not available". I've never received a call that I couldnt get the number for by dialling 1471.

If it helps, I'm in an ex-CWC area and I use *227# to enable it and #227# to disable it.

Chrysalis · 01-05-2005, 00:23

Well what makes a number simply not be available?

They must be witholding it some other way.

bob_builder · 03-05-2005, 10:52

Quote:

Originally Posted by Chrysalis

Well what makes a number simply not be available?

They must be witholding it some other way.

A lot of old private exchanges (before CLID) do not pass on any number. So if you route you call via one of them you get a "number unavailable" message and not a "number withheld" message.

Chrysalis · 04-05-2005, 00:09

Interesting yeah thats a problem, when you say private you mean it would only affect special types of customer?

bob_builder · 04-05-2005, 10:38

Quote:

Originally Posted by Chrysalis

Interesting yeah thats a problem, when you say private you mean it would only affect special types of customer?

Private exchanges (the type you have in a company connecting all the extensions together and to the outside world) as opposed to a public exchange (the type a home customer is connected to with NTL or BT).

Modern private exchanges will normally issue the direct dial number of the extension calling out or a "presentation number" (usually the main reception or switchboard number).

Stuart · 04-05-2005, 10:55

Quote:

Originally Posted by bob_builder

Quote:

Originally Posted by Chrysalis

Interesting yeah thats a problem, when you say private you mean it would only affect special types of customer?

Private exchanges (the type you have in a company connecting all the extensions together and to the outside world) as opposed to a public exchange (the type a home customer is connected to with NTL or BT).

Modern private exchanges will normally issue the direct dial number of the extension calling out or a "presentation number" (usually the main reception or switchboard number).

Also known as PABX's I believe?

Chrysalis · 04-05-2005, 20:48

Hmm isnt this illegal to not have the calling number traceable?

bob_builder · 05-05-2005, 11:25

Quote:

Originally Posted by Chrysalis

Hmm isnt this illegal to not have the calling number traceable?

It is still traceable using the old-fashioned methods before CLID existed, it just does not present a number as CLID data.

In fact, relying on CLID data to "trace" a call is not enough. The data can be faked or scrambled anywhere along the chain. In fact, there are legal charging services in the US that will do this for you.