[VoiceOps] Geographic redundancy
abalashov at evaristesys.com
Wed Aug 12 10:13:59 EDT 2009
Jason Vanick wrote:
>>> No, not sure how you got this idea, you think every mid-sized ISP in the
>>> '90s had connections to the service control points? For a CLEC to get a
>>> lot of the O/T benefits SS7 interconnection would be desirable, but not
>> That's true. I was assuming we were talking about telephony here
>> There are a few uses ISPs have for CLEC licenses that have nothing to do
>> with phone. One is rights-of-way for network build-out, pole
>> attachment, etc. Another is getting UNE rates on leased circuits
>> instead of wholesale access rates. That still required interconnection
>> and/or CO colocation for aggregation, but not SS7.
> There were 2 other good reasons to have a clec license, at least in the
> rate-center type latas... (Chicago/Lata 358 comes to mind)...
> 1. was to play the reciprocal comp game with the ILEC... At least one CLEC's
> entire business model was nearly completely based on this early on (Focal Communications)
Ha! Oh, yes, the good ol' reciprocal comp. arbitrage. :-) Some of
them were practically giving away bulk PRIs to ISPs... didn't matter,
it's the reciprocal compensation that counts.
> 2. was to have a folded modem pool where all the rate centers terminated into one
> large modem pool. It was easy to turn up a few ds3s to a few tandem switches to receive
> inbound calls from a large portion of the lata. After you got up and running and found the
> 'hot spots' you'd then turn up end-office trunks to each of those rate centers to take
> advantage of the more favorable termination rates for #1.
Yes, but these require SS7 interconnection. The discussion was about
applications for a CLEC license by an ISP that isn't connected to the
ILEC tandems and, therefore, doesn't take phone calls per se. :-)
> Ah the good 'ol days of the Dial-up isp biz... I remember 20+ Ascend Max TNT's each humming
> along with 16 inbound PRI's of dial-up...
> If I remember correctly tho, in order to connect to the tandems you had to be able to provide
> ss7 services. We got all of our ports out of a DMS500, but I do remember people using something
> from cisco to emulate a switch (SCC maybe?) and back end all the dial traffic into 5800's....
There were lots of switch-lite solutions (signaling gateways) that were
popular during the dialup boom. The Cisco PGW was very popular among
them. All of these could control media gateways via H.248/MEGACO or
MGCP, and the TNTs did H.248. Just very basic SS7 ISUP->media gateway
control was needed to get modem pools going.
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