Regs: i get all sorts of strange CLI's coming through but not, as far as i know, DIDs. when i get SIP trunk to SIP trunk calls (e.g. orcon to callplus, callplus to callplus, where both ends on sip trunks) i seem to get whatever the remote party sets on their system for CLIs

maverick:

Regs: i get all sorts of strange CLI's coming through but not, as far as i know, DIDs. when i get SIP trunk to SIP trunk calls (e.g. orcon to callplus, callplus to callplus, where both ends on sip trunks) i seem to get whatever the remote party sets on their system for CLIs

Not good really, as an industry we should be trying to maintain CLI credability especailly around SIP, emergency services rely on this, but I'm afraid number of SIP providers do not and so we see more and more of this as it pretty esay it seems to offer VOIP calls but getting the finer points correct ...not so easy ...... pretty disappointing from a professional standpoint

Regs:

maverick:

Regs: i get all sorts of strange CLI's coming through but not, as far as i know, DIDs. when i get SIP trunk to SIP trunk calls (e.g. orcon to callplus, callplus to callplus, where both ends on sip trunks) i seem to get whatever the remote party sets on their system for CLIs

Not good really, as an industry we should be trying to maintain CLI credability especailly around SIP, emergency services rely on this, but I'm afraid number of SIP providers do not and so we see more and more of this as it pretty esay it seems to offer VOIP calls but getting the finer points correct ...not so easy ...... pretty disappointing from a professional standpoint

first of all there is a difference between DID and CLI.  The DID is something that is controlled by your own telco - it is the direct inward dialled number.  This should only ever be presenting a number that terminates on your endpoint.  if this is coming through with strange numbers then something is wrong at your telco.

secondly the CLI - with the CLI there can be two components: display name and sip number.  if both are passed then most sip software will choose to show the display name instead of the sip address.  I don't see any problem in passing on the display name portion as has been presented to the telco, but the sip address portion should only ever pass valid addresses.

with respect to the sip addresses, how do you 'validate' them?  given that SIP can extend to the internet and a sip party could be reached by email rather than number, do you allow only valid PSTN number plus anything with an @ and a valid TLD?

as for emergency servcies, the SIP number alone is of limited use as it is not necessarily physically tied to a physical location - especially in interconnected office situations where calls are tunked from head office.  The US has its E911 for providing location servcies and re-rerouting emergency calls and some VoIP systems are built to work with these.  Without regulation requiring sip trunks to be configured this way, i don't see this as a solution, more an option that many people probbably won't implement for lack of knowledge or lack of compatibility.

Regs: i get all sorts of strange CLI's coming through but not, as far as i know, DIDs. when i get SIP trunk to SIP trunk calls (e.g. orcon to callplus, callplus to callplus, where both ends on sip trunks) i seem to get whatever the remote party sets on their system for CLIs

Maverick:
Yep pretty sure I am up to play with DID and CLI differences but you see I was referring to CLI or ANI not DNIS or DID,

Kraven: I have call notification emails turned on for my VFX line at home and received 'Call Notify 107' earlier.

I'm guessing this is another case of another irresponisble operator passing bogus information across to WxC? Unless 107 is a valid CID?

Phil you're welcome to PM me if you want further information.

freitasm: On this note, Phil I have been receiving some email notifications and the strange thing is the email lists my own landline number as the calling party?

freitasm: On this note, Phil I have been receiving some email notifications and the strange thing is the email lists my own landline number as the calling party?