I would say that "hundreds of CTI ports" is an exaggeration on your part.
The number of CTI ports (IP IVR ports) depends on the length of the conversations (IVR and agent), as well as on the BHCA.
If we plug 1000 into the IPCC Standard Resource calculator without changing any of the other defaults (IVR time = 30s, talk time = 150s, after work time = 60s), it recommends 65 agents, and tells us that we need 16 IVR ports for treatment and 8 IVR ports for queuing - a total of 24 IVR ports.
Creating 24 route points for trans routes for the 24 CTI ports is not such big deal, and it does ensure that there will never be an issue with the trans routes. Although the call is not on the route point for long, under some failure conditions the route point is out of service for the duration of a timer.
Route points are free - and IVR ports are expensive. So why run the risk? The trans route wizard makes it easy to have a bunch of DNIS, so why guess and worry? Max 'em out, I say.
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