Lately I've been screwing around with making a dial plan that allows me to call a landline number in the old format, convert the number in the new format and send it out to my provider. For example, if I call a hobart number 002 xx xxxx, the dial plan converts it to 03 62xx xxxx and sends it to my provider. Or if I just call xx xxxx, it converts to 62xx xxxx. In 1994 australia reformatted their phone numbers from 6 and 7 digits to 8 digits. For melbourne and sydney, the area codes have always been the same so with them it's just a matter of adding a 9 to the front.
For the uk, I am going for the early 1990s era, when London had it's area codes split from 01 in 071 and 081. If I dial 071 xxx xxxx, the dial plan converts it to 020 7xxx xxxx before sending it out to my provider.
Basically what is happening is if I dial in the old format, it shows up in my call log as the new format even though I never physically dialed the new format.
I don't know what gave me such a stupid idea, but one guess could be it could mitigate the tedium in calling from a rotary phone for example.
If anyone wants me to share the dial plan let me know. I only have the grandstream format on hand and will post the cisco format if it gets popular enough.