[CentOS] Asterisk and VOIP was Re: CentOS for non-tech user
rb4centos at gmail.com
Thu Oct 1 00:06:01 UTC 2009
On Wed, Sep 30, 2009 at 5:34 PM, Les Mikesell <lesmikesell at gmail.com> wrote:
> But even with old-school phone switches, your support contract would
> require software updates at regular intervals and unless you had
> redundant hot-failover equipment, that would involve scheduled downtime.
Not with Nortel. Patches were optional -- updates, new features and
additional licenses were sold as separate products. That's in the PBX
(Option) line of switches (almost all of which have been "dual core"
-- redundant -- for about 25 years). In the Key System switches
(Norstar), patches were unavailable, though you could buy keycodes to
enable additional features. If you wanted to update you bought a new
version of the software on a flash medium (if one was available).
Traditional telephone switches are expected to up 24/7 unless you are
doing a major upgrade -- and that's usually scheduled months in
advance. The goal is to achieve the "five 9s" (99.999% up time).
RonB -- Using CentOS 5.3
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