Hello,
This is question on PBX behavior, what is the right thing to do, and how do PBX's generally behave.
If a user on a phone, dials a number, which happens to be configured on the same phone system (for example another tenant), there are two options:
1. The PBX notices this, and directly connects the phone to the DID on that system (breaking separation of tenants) 2. The PBX sends the call out on the SIP trunk, and the provider-routing sends the call back as an incoming call.
What are the pros and cons of each option from the SIP provider point of view? How do PBX's generally behave?
Thanks, Antonio
PS: I reposted, because the original question was apparently not phrased in a clear way.
Hello,
On 07/06/15 05:06, Antonio Gómez Soto wrote:
Hello,
This is question on PBX behavior, what is the right thing to do, and how do PBX's generally behave.
If a user on a phone, dials a number, which happens to be configured on the same phone system (for example another tenant), there are two options:
- The PBX notices this, and directly connects the phone to the DID on that system (breaking separation of tenants)
- The PBX sends the call out on the SIP trunk, and the provider-routing sends the call back as an incoming call.
What are the pros and cons of each option from the SIP provider point of view? How do PBX's generally behave?
Thanks, Antonio
PS: I reposted, because the original question was apparently not phrased in a clear way.
I guess the proper answer is: this is an option of the dialplan of the pbx.
But based on experience so far, the pbx doesn't sent the call out to a provider when the call is to another extension in the same pbx. More, in many cases there is not 1-to-1 relation between pbx extensions and PSTN numbers. Typically a pbx has more extensions than PSTN numbers. PBX extensions are short numbers allocated as needed, while PSTN numbers are bought based on estimation of use, being mappend to some internal pbx extensions.
Cheers, Daniel
Am 07.06.2015 um 05:06 schrieb Antonio Gómez Soto:
Hello,
This is question on PBX behavior, what is the right thing to do, and how do PBX's generally behave.
If a user on a phone, dials a number, which happens to be configured on the same phone system (for example another tenant), there are two options:
- The PBX notices this, and directly connects the phone to the DID on that system (breaking separation of tenants)
- The PBX sends the call out on the SIP trunk, and the provider-routing sends the call back as an incoming call.
What are the pros and cons of each option from the SIP provider point of view? How do PBX's generally behave?
Thanks, Antonio
(a bit late but maybe still interesting) I always keep the call local to my environment, but not local to a single PBX. E.g:
PBX1---\ \ PBX2----GW----- TRUNK ------------- PSTN-Provider / PBX3---/
Calls which are internally to a customer stay on the PBX (as these are not charged usually).
Calls between my customers are always routed to my "Gateway", which decides the routing, e.g. sends the call back to the same PBX or some other PBX (for local DIDs) or to the PSTN termination provider.
This way I always have the same routing and CDRs regardless if the user is on the same PBX or some other. For billing I only use the CDRs generated by the "Gateway" SIP server (I use Asterisk).
In a small setup this may seem a bit complicated. But you soon may have multiple PBX servers (lots of customers, different PBX software versions ....).
regards Klaus
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Antonio Gómez Soto -
Daniel-Constantin Mierla -
Klaus Darilion