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BRI to Brazil

I have just setup an office in Rio which dials in to our new york office. Brazil uses European standard isdn basic-net3 on a cisco. From NY I cannot dial into Rio, and Rio only dials into NY successfully 1 out of 4 times. Our set up in Buenos Aires works perfectly and also uses the European standard.

When I debug q931 it shows Bearer Capability i = 0x9090A3 which is voice.

The local telco say it works ok with their NT1 (they can call it and it rings).

With the Cisco 1604 integrated NT1 (purchased in the US) you get a fast tone. But it does get thougg to the US.

Is it possible that the NT1 is different?

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