Thanks - we'll add this information. The per-minute charges are fixed for a given number type for inbound calls. They're cheapest for landline numbers (e.g. ju

Thanks - we'll add this information. The per-minute charges are fixed for a given number type for inbound calls. They're cheapest for landline numbers (e.g. just under EUR 0.01 per minute for a UK landline), very slightly more expensive for mobile numbers, and quite a lot more expensive for toll-free numbers (since you're paying the cost for the caller). For outbound calls, it depends where you're calling. There are volume discounts available. We guarantee one simultaneous channel per phone number for Basic accounts. For Pro accounts ($10/month) we guarantee an additional 8 simultaneous channels which can be used across any of the phone numbers as demand requires. Those are guarantees and our system will often allow bursting above them if capacity allows. For Business accounts (negotiated minimum spend) we can negotiate any number of simultaneous channels. Pro & Business accounts have SIP support, both registration and directing inbound calls to a SIP URI.