[VoiceOps] PRI Gateway Supporting 1 - 3 PRI's
mclark at phyber.com
Tue Dec 10 19:58:21 EST 2013
So for installations requiring more than 2x T1s what's the recommendation?
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On Mon, Dec 9, 2013 at 8:12 PM, Jay Hennigan <jay at west.net> wrote:
> On 12/9/13 4:52 PM, Max Clark wrote:
> > I'm assuming that the Adtran TA900 has a high precision clock. Do they
> > come in 4x PRI configurations?
> It has an internal oscillator for T1 clock, but not of BITS type
> accuracy. You'll get slips if you have a BITS-timed T1 connected with
> the Adtran set to internal clock. Of course you can set it to
> synchronize from line.
> We've never had any problems driving a stand-alone PBX from its internal
> I haven't evaluated the precision of its time-of-day clock. It supports
> NTP so this hasn't been an issue.
> Maximum number of PRIs supported is two on the -e models, even though
> they have four T1 interfaces, only two of them support TDM voice. The
> other two (or all four if you want) can be used for data as PPP, HDLC,
> or frame-relay.
> Jay Hennigan - CCIE #7880 - Network Engineering - jay at impulse.net
> Impulse Internet Service - http://www.impulse.net/
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