Two of my best.
I work in a call centre, but rarely answer the phones these days as I act as more of an oracle or info sponge due to my vast knowledge of our systems. Here are two of the highlights from my telephonic early days:

First -

A requested callback for a customer finds its way to me one morning.

After checking the contact details I ring the number and glance down at the customers name in preparation of him answering, taking a sip of coffee whilst I wait.

The first name looks foreign and unpronounceable so I immediately check his second name ( I prefer the casual use of first name, thats my style) just as the customer answers the phone..

The customer is greeted by a choked retching sound as I splutter coffee all over my desk.

"sorry about that Mr Manjina." As I try to mop up the spillage with my tie.

"Please, call me Prit for short" he said, referring to the first part of his name.

Second -

A canadian customer calls. As part of the security questions, I am required to ask his address details.

He tells me his post code "V4G 1N4". I take a couple of seconds whilst this sinks in.

After the pause, the customer says, "yes, it DOES spell vagina".

(If you don't believe me, search google maps..)

My advise if you work in a call center - Learn everything. Let the monkeys do the work.
(Haddle The date sponsored by Accurist is, Thu 3 Sep 2009, 21:01, 4 replies)

It's real!
http://maps.google.co.uk/maps?q=V4G+1N4&um=1&ie=UTF-8&split=0&gl=uk&ei=HyigSvDnOYza-QaMsczbDw&sa=X&oi=geocode_result&ct=title&resnum=1
(Pope Jamiroquai III, Thu 3 Sep 2009, 21:34, closed)

I have learned something new today
And will be forever examining post codes from here on out to see if they spell anything.
(louveciennes , Volvospotter, Thu 3 Sep 2009, 21:50, closed)

,
NE1 4ABJ
(Shifty weeeee, Fri 4 Sep 2009, 3:03, closed)

typed into Google Maps
brought up the suggestion:

NE1 4 ABJ near Canada?
(bamboozled Can hear you getting fatter, Fri 4 Sep 2009, 4:32, closed)