Pros
The more you screw up, the less you'll have to do...up to a point, of course... Keep a low profile & you should be able to ride out your job till you're surplussed - be cool when dealing with other areas & help them out when you can & you'll be able to move to another group when they cut your job.
Cons
As far as I can tell, it's just a little worse than the other telcom's - benefits SUCK (if you're management, the union seems to be looking out for its people); people who do their job very well end up getting stuck in it because they can't afford to move someone competent into management; "raises" come in just under the rate of inflation - no matter if you excel or not - managers try to keep compensation even across their employees; most job training consists of some web pages you click through just to get your "certification."