* Posts by Peter Pudaite

1 post • joined 16 Jan 2008

T-Mobile looks to ADSL for mobile backhaul

Peter Pudaite

correction

3GPP R6 standards allow for IP in the network. 3GPP R99 mandates ATM only. R7 onwards I think is IP only. The likely reason they wanted to do ATM encapsulation is that:

a) they didn't want to get rid of their ATM network just yet.

b) their node B/RNC vendor doesn't allow mixed IP/ATM interfaces. (voice over ATM via PDH/SDH, data over IP via xDSL offload)

c) they don't have an IP RAN in place to support a full IP backhaul.

d) they may also be backhauling other stuff like 2G EDGE/GPRS traffic too.

Can anyone at T-mobile confirm?

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