Feb 27 2020 11:11 AM
Feb 27 2020 11:11 AM
Feb 27 2020 11:22 AM
It can entirely depend on the organizations involved. Several I've worked with have a lot of analog equipment that they still need to support on premises. Taking these to third party SBC providers isn't always easy compared to hosting your own SBC.
Third party integrations, such as call center, that might have dedicated hardware that the hosting provider won't/cannot connect to.
Number portability, and retaining the control over their number pools.
One of the bigger ones I've seen has been cost. The cost to host the infrastructure and SIP trunks, has been less than having somebody else host it. That doesn't include things like the cost built into the number of users that the provider may charger by as well.
Feb 27 2020 12:23 PM
Feb 27 2020 01:03 PM
Interesting to hear. I suspect that there may not be enough talk or details being provided that might lead to confusion over what is capable. I agree that if you provide SIP, anything you can probably do on-premises can be done with a service provider as well.
A couple I've seen previously only did SIP to specific providers, which would be Teams/Skype, but that'd be it, so you could not get the integrations you'd possibly need for third parties.
I guess the number portability thing comes up because the few folks that I've seen that offer hosted PBX services are not usually the carriers, such as AT&T, BT, etc, so there is hesitation on porting the numbers to somebody else. It becomes an issue between "I'm paying my carrier and they're my numbers" to "I'm paying vendor A, to whom I transferred my numbers, and now they own them under their contract". Granted, most situations like that probably have clauses that say the numbers are still yours, but folks get antsy about losing that control.
Other caveats could be directory lookups for call routing decisions, for example user exists in AD with phone number, then route to MS Teams, otherwise route to old PBX. I'm sure there are ways around that such as VPN, or LDAP servers with firewall restrictions.
It might also be regional, you mentioned UK so the offerings might be different compared to the US where I've been dealing with folks. It would be a curious survey, calling plan vs direct routing vs 3rd party direct routing, and broken down by countries.