RE: (PM) (ANNC) ComOS 3.9b8 available for open beta forPortMaster 3 (fwd)
James Courtier-Dutton (dutton@livingston-ent.co.uk)
Mon, 5 Apr 1999 19:18:38 +0100
> -----Original Message-----
> From: owner-portmaster-users@livingston.com
> [mailto:owner-portmaster-users@livingston.com]On Behalf Of John W Baxter
> Sent: Monday, April 05, 1999 06:45
> To: portmaster-users@livingston.com
> Subject: Re: (PM) (ANNC) ComOS 3.9b8 available for open beta
> forPortMaster 3 (fwd)
>
>
> >Once upon a time jon-lists shaped the electrons to say...
> >>Is this an "automatic" thing if I install 3.9b8? I'd like to get 2 extra
> >
> >No, it is not automatic. You have to have PRIs configured to support
> >NFAS - that's an ordering option with the telco. With the PM-3 they
> >have to be NI-2 switch type with NFAS.
> >
> >-MZ
>
> (above is MZ responding to "jon-lists")
>
> And, you almost certainly should order the second, backup, D channel
> in the NFAS group, if you go that way. [Personally, I would wait at
> least until 3.9 final to consider doing this, since if a beta issue
> develops in 3.9, and you've had the telco make the change, you have
> "problems"...it's not an issue for us right now since we have several
> CT1s and one PRI.]
>
> If you have only one D channel, then a failure in that T1 puts ALL
> the lines in the group down...with the second D channel as backup (in
> another line), you survive that single-line failure.
>
> So...you have one PRI with the working D channel, one with the backup
> D channel, and in the OTHERS you gain one channel per PRI (up to the
> group maximum).
I thinks things are even better than this.
You have the Primary D channel working, You configure the secondary
D-Channel but until it is required, you can receive calls on it. When the
Primary D channel goes down, it will kick the person off who is using the
secondary channel, and use that instead.
I might have read things wrongly, but this sounds pretty cool to me.
>
> I haven't read the details, but this should be like multi-chassis
> multi-link: all the involved PM3s on the same ethernet, so they can
> exchange information (so it's likely you can't tie remotes to locals
> in the same group).
>
> Query: can backhauls and locals participate together? (My guess is
> no, but this is one of millions of issues I'm not qualified to guess
> about.)
>
> --john
> --
> John Baxter jwblist@olympus.net Port Ludlow, WA, USA
> Give a man a fish and you feed him for a day. Teach him to fish,
> and you get rid of him for the weekend.
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