[Asterisk-biz] tandem locations

[alex at pilosoft.com]

On Tue, 5 Apr 2005 asterisk at slkgroups.com wrote:

> i am trying to determine where the ILEC has there 'central switches' -
> the ones that 'talk' to all/most of the other switches in a LATA. i was
> offered a deal on PRI circuits - but i need to get a piece of real
> estate near the 'tandem'.
> 
> Alex (in his 8:48P email) described quite nicely. what i am hoping to
> find- since i assune it exists- is a listing of ILEC tandems, and their
> physical address. i have found two places to locate the switches, but
> neither differentiate between a 'common' switch and a tandem.  i have a
> switch 3200 ft away, butr i doubt it is a tandem.
> 
> thanks again all- i hope that i have clarified this a bit.
> 
> Alex- any chance we can talk??
It depends why do you need to know (i.e. what kinda tandem you are looking
to connect to, and for what purposes). Do you need to connect to PSAPs? If
yes, you need E911 tandem, if you looking to interconnect with ILEC to
exchange local voice traffic, you need access tandem, etc. For whichever
purpose, there is a different contact point with your ILEC that would be
able to give you the information necessary. I *believe* your state PUC 
will also have the list of access tandems in a given LATA (ones that you 
must interconnect if you are going facilities-based route), since they 
have a role in a rollout of each new access tandem.

LERG has a lot of relevant information. It is not free. There's 
www.telcodata.us which has a lot of useful information extracted out of 
LERG. They provide 'subtending tandem' info for certain LATAs, but don't 
appear to do this for LATA 132.