112 actually introduced to the irish system pretty flawlessly except for one slight problem:

Voicemail access used to be 121 a lot of ppl managed to dial 112-1 getting put thru to emergency services. Eventually they had to just move voicemail access to 171

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Ireland has a slightly strange set up vis-a-vis public voicemail. It's relatively universally and getting quite sophisticated (ability to recieve SMS and read them back if you've no SMS capable phone, send messages directly to other mailboxes, forward messages etc)

But the weird bit:

Mobile phones have always had associated voicemail numbers which you can dial from anywhere. e.g. if your mobile number is 087 999 9999 your voicemail is 087 5 999 9999

As of this year fixed line phones have something similar (until now the mailboxe nubers were hidden).. prefix the areacode with 03 and you've got the voicemail box associated with that line. E.g. 021 999 9999's mailbox is 03021 999 9999..

You can use call diversion from mobile/fixed line to send all your messages to whichever voicemail service you choose etc..

Dial 171 from any phone (fixed/mobile) and you'll get its mailbox.