I have a T1 terminated on an Adtran Netvanta 3200. This circuit is flapping regularly - I count 20+ loss of frame events in the last hour. The ISP tells me that the LEC/telco is testing clean up to ...

The author is chief engineer of Minnesota Public Radio. Legacy T1 circuits have long provided radio broadcasters with a reliable way to contribute and distribute program audio. The telecom industry’s ...

Back in the old days, the only realistic way to connect multiple remote sites was by T1 or T3 delivered either point-to-point or via Frame Relay. These were either slow and expensive or fast and ...

(click thumbnail)When shopping for audio transmission equipment, the choices and selections can be pleasing and daunting all at once. We at NPR had such a selection to make recently. We needed ...

We have some antiquated equipment where I work and some of it is starting to reflect that. This is the second time that errors were accumulating on a circuit, but not impeding data flow. The errors ...