So for installations requiring more than 2x T1s what's the recommendation? *Max Clark* Managing Director | Phyber Communications +1 (213) 929 1700 | mclark at phyber.com Visit us at www.phyber.com Hosting | Network | Voice 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 clock.
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.
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