Slashdot Mirror
Cell Phones Companies Fight Number Portability
andy1307 writes "The Washington Post is reporting that wireless companies are opposing mobile number portability. According to the law as it is being written, customers would be able to transfer wired phone numbers to a wireless service. Not surprisingly, Verizon is the wireless company opposing the law."
We've had it for years, its been handy to take my number between networks without problems, but the whole cost of cross network charges is a pain. You used to know which network someone was on by their prefix, now you haven't got a clue, and its almost worth asking "what network are you on" when you first call someone, just to keep call charges down.
Number portability and virtual networks is the key to a healthy and competitive cell market. I live in Norway, where we have two networks (Telenor (former state monopoly) and Netcom). These companies have the GSM infrastructure and rents out air time to virtual operators such as Chess, Sense, Carrot and You. Combine the vitual networks with law-mandatory number portability and you've got some good competition going on. The prices have gone down a bit after the portability was introduced. When there was only Telenor and Netcom, you had an effective oligopoly.
here in Canada, and I think one of the main issues here we're (as in slashdot) ignoring is the simple less sinister one: cost.
Number portability, atleast for us, is a major expensive pain in the @ss.
We are planning on moving towards number portabilty, because we feel it's ultimately good for everyone involved - new cutomers that move into our area can keep old numbers etc. etc. We also get a happier customer out of the deal, if he/she can choose us over another competitor simply because they can keep their phone number - we feel that will offset the cost of churn.
The problem is, billing systems need to be updated, massive changes in the switching equipment need to be maintained AND - we need cooperation from other Telco's. In Canada as well, there's the legal issues of satisfying the government, (CRTC), so unfourtunately everything moves at a snail's pace.
I'm not sure about other companies in the US, but I don't think it's a typical problem of the "huge corporations trying to screw the customers" in this case, which is often trumpeted by the majority of slashdotters. Basically a major rework of the phone system needs to be done throughot North America to make this work properly, and sadly this is going to take some time.
A lot of people are complaining about the fact that in the United States, we only give out blocks of 10,000 numbers. That simply isn't true anymore. Most people don't realize this, but last November, all non-GSM (more on U.S. GSM in a sec) U.S. Cell companies 'split' their phone numbers into two identical numbers... one called the MDN (Mobile Directory Number, or Mobile Dialable Number), and the MIN (Mobile Identification Number). The MDN is what you actually dial when you call your friend on their cell phone, and the MIN is (sort of) what the call routes on (actually, it routes on a different number called the Local Routing Number or LRN, which is associated with the MIN, but I digress...).
Anyway, when the numbers got split, it because possible to dole out phone numbers in smaller blocks... if someone needs a block of 1000 numbers and it's in the same cost center (think long distance charges) as someone else who needs 1000 numbers, they can share the same block of 10000 MDNs and use different MINs with different LRNs. This whole process is called 'Number Pooling'.
All of this also allows for WNP. So essentially, the software is already doing all of the 'hard stuff' today... we've been using two phone numbers since last November. On Nov 24th 2003, you will be able to port your MDN. Your MIN will change. So your dialable number might go from Verizon to Cingular, but your MIN will change from a Verizon MIN to a Cingular MIN. You and your friends don't notice any difference... think of your dialable number like a pointer to a MIN.
Confused? See why Verizon doesn't want to do this? I think WNP is a good thing, but I barely understand this stuff, and I helped write the damned software that's supposed to do all this... imagine training hundreds of customer care staff on how this stuff works.
GSM in the U.S. is a little less scary 'cuz it was designed from the ground-up to route on a separate number from the dialable number (they call the diable number the MSISDN... forget what it stands for off the top of my head... it's pronounced 'Mizz-din'.) GSM routes (again, sort of) on the IMSI, which is programmed into the SIM card. It's kinda sorta like combining the ESN (serial number on the phone) and the LRN from the TDMA/CDMA world into one number.