[AusNOG] FYI: Telstra carrier interconnects are full

Michael Junek michael at juneks.com.au
Mon Mar 23 15:28:18 EST 2020

AAPT certainly were running SS7 over various SDH technologies when I was last working on their call centre platform a few years back.

From: AusNOG <ausnog-bounces at lists.ausnog.net> on behalf of Mark Delany <g2x at juliet.emu.st>
Sent: Monday, 23 March 2020 15:20
To: ausnog at lists.ausnog.net
Subject: Re: [AusNOG] FYI: Telstra carrier interconnects are full

> Yes. With Telstra, it's an EXTRAORDINARLY big deal. You still have to
> use specific hardware, and SS7 signaling over ISDN

Oh. My bad. I was basing my assumptions on how I've seen voice delivered in the US. Even
big ol' bad boy and recalcitrant Telco, AT&T provides SIP over a PNI. At my $DayJob we
have a 10G PNI to them. Easily provisioned and managed as just-another-IP-network.

I was also under the impression, tho I could be wrong, that voice interconnects in the US
are increasingly over private IP networks with SIP. I assumed Australia was doing the
same. You are clearly saying "not so".

But ISDN? I still have nightmares over Telstra-variant LAPD state-machines from the dark
ages. I thought all that stuff was archaeological by now. Next thing you'll be telling me
is that Telstra still carry voice over an ATM transport or some archaic plesiochronous

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