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New Member

IGX External Clock Source

I am looking for an external clock source for an IGX 8410. Does anyone have experience using a GPS solution? If so, which vendor/product(s) have you used or recommend?

  • Other Network Infrastructure Subjects
New Member

Re: IGX External Clock Source

Products from Larus are excellent. They are used extensively in telcom networks and larger private networks. Of course, good equals relatively expensive. So it depends on what your criteria are.

Here is their web page:

New Member

Re: IGX External Clock Source

Just remember that the IGX uses a balanced RS-422 signal from an external clock. The connector is a DB-15 though, so it is confused often with a T1 input. A T1 input WILL NOT work. Hope this helps!


Mikhail Mooney

WAN CCIE #6692

New Member

Re: IGX External Clock Source

Good to know. Most timing systems such as the Larus products that I mentioned output a BITS (Building Integrated Timing System) clock (this is a bipolar signal very much like a T1), a sine wave (1 MHZ or 5 MHz), or 1 pps (pulse per second). So you may need something like a Versitron CDS-20 in the picture as well. This is actually a clock distribution system that accepts different types of inputs and, in turn, outputs RS-422 timing signals.

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