We are currently looking at connecting two Asterisk servers across a Metro Ethernet. This leads to a couple of questions I haven't been able to find answers to elsewhere.
The first involves bit error rates and cabling. I would expect that TDMoE, by virtue of being timing sensitive would also be very sensitive to bit error rates (i.e. I don't see how missing data could be retransmitted). Is this a correct assumption? Data seems pretty sparse. Should I be basing cabling considerations around BER for the links between the two servers? Should I be asking BER-related questions to the Metro Ethernet provider?
Or is the protocol capable of handling reasonable loss?
I don't have a lot of experience with TDMoE but thinking through this, my concern is that lost ethernet frames would lead to lost PRI frames which might lead to dropped calls and PRI's going into alarm states.