Occasionally in voice world you end up configuring PRI connections to devices other than telco gateways. Sometimes these are PRIs between PBXs, fax servers, or other third-party vendor voice gateways for applications. These are typically connections internal to the organization versus a PRI to the outside world. Many times these require you to think just a little bit differently than your standard PRI turn-ups to get to that fabulous MULTIPLE_FRAME_ESTABLISHED goodness.
I’ll offer you a few things to look out for should you find yourself in this type of situation. Keep in mind that no voice installation is ever *standard* so your mileage may vary.
1. T1 crossover cable. It’s a thing. Often times the vendor bringing in their voice gateway will tell you things like “it’s just an RJ45 hand-off” or “just provide us a straight-through cable” but don’t believe the lies. More often than not in cases where you are…
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