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How much do calls cost with dmSwitchboard12?

Summary of dmSwitchboard12 calling charges

Calls pass through up to 3 services to get to their final destination. This note explains where call charges can be incurred.

dmSwitchboard12 Call Flow

Examples from Williams Widgets

Williams Widgets is a fictional company (although don't tell the MD!) used to explain our services.

1) Someone calls Williams Widgets on their UK Geographic phone number and selects Accounts dept. The call is taken by Priya Williams on her WebPhone.

	Call Cost	Notes
dmConnect	0	Customer pays normal UK landline rates
dmSwitchboard12	0	Covered by monthly rental charges
dmCalls12	N/A	dmCalls12 is not needed to connect to WebPhone
Total	0	This call is totally free to Williams Widgets

2) Someone calls Bill Williams on his Personal Extension DDI (a UK geographic number). He takes it at home on his landline phone. The call lasts 3 minutes.

	Call Cost	Notes
dmConnect	0	^{Customer pays normal UK}^{landline rates}
dmSwitchboard12	0	Covered by monthly rental charges
dmCalls12	3.75p	dmCalls12 rate to UK Geographic is 1.25ppm (with a minimum charge of 3p)
Total	3.75p	Obviously would have been cheaper if Bill had a Web or VoIP phone at home.

3) Someone calls Williams Widgets support line (which is an 0844 number). The call goes through to Henry who's off-site and takes it on his mobile. The call lasts 5 minutes.

	Call Cost	Notes
dmConnect	-8.5p	^{Customer pays 5ppm (more if from a mobile) dmConnect on 0844 gives a payout of 1.7ppm. Payouts are calculated at the end of the month and can be credited to WW's dmClub account.}
dmSwitchboard12	0	Covered by monthly rental charges
dmCalls12	40p	dmCalls12 rate to UK Mobile is 8ppm (with a minimum charge of 3p)
Total	31.5p	40p is charged immediately, but 8.5p is credited at the end of the month.

4) Someone calls Bill Williams on his UK Geographic Personal Extension DDI while he's relaxing by the pool in his villa in Spain. He takes the call on his UK mobile, but then goes inside and transfers the call to his WebPhone. The call lasts 45 minutes, of which the first 2 were on the mobile.

	Call Cost	Notes
dmConnect	0	Customer pays normal UK landline rates
dmSwitchboard12	0	Covered by monthly rental charges
dmCalls12	16p	dmCalls12 rate to UK Mobile is 8ppm (with a minimum charge of 3p). His mobile phone company will bill him for roaming charges in addition. The bulk of the call, taken on his WebPhone attracts no charge (this makes Bill very happy)
Total	16p	If the call had not been transferred, this would have been £3.60.

Outbound Call Examples

5) Priya Williams calls a supplier from home using the WebPhone. As it happens, they're not in, but she leaves a message. Total call duration was 45s.

	Call Cost	Notes
dmConnect	N/A	Outbound calls from WebPhones & VoIP phones don't use dmConnect
dmSwitchboard12	0	Covered by monthly rental charges
dmCalls12	3p	dmCalls12 rate to UK landline is 1.25ppm (with a minimum charge of 3p). In this example, the minimum call charge applies.
Total	3p	Note that using BT on standard residential package would have cost 21.1p (and would have had a confusing CallerID).

6) Jane Williams calls Wallaby Widgets (their Australian agent) in Sydney. She's on the train, and calls from her iPhone (using a natty little app to access her Personal Extension via CLI authenticated login and dial-on). Total call duration was 3m30.

	Call Cost	Notes
dmConnect	0	Jane's Personal Extension has a UK Geographic DDI. As it happens, her mobile phone package includes unlimited UK landline calls, so there's no cost to her for this part of the call.
dmSwitchboard12	0	Covered by monthly rental charges
dmCalls12	7p	dmCalls12 rate to Australia is 1.85ppm (with a minimum charge of 3p).
Total	7p	Note that O2's standard rate is £1.03/minute.

7) Ray Smith calls his transport company on their 0800 number from his DECT VoIP phone. The call lasts 5 minutes.

	Call Cost	Notes
dmConnect	N/A	dmConnect is not used by WebPhone or SIP Phones
dmSwitchboard12	0	Covered by monthly rental charges
dmCalls12	0	dmCalls12 rate to UK Freephone is 0ppm (with no minimum charge).
Total	0	One day, mobile phone companies won't charge either!

How we calculate dmCalls12 call costs

There is no connection charge
There is a minimum call charge of 3p (lower than most of the big players).
But there is no charge to call UK freephone numbers, or if the call does not connect.
At the end of the call we calculate the cost using the call length in seconds and the pence per minute rate
(unlike some services we don't round call times up to the minute).
If there is a part of a penny, we round up to the next penny (e.g. 60 seconds call to Vodaphone UK costs 8p, 61 seconds costs 9p)

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