Voice gateway

[pablosorella]

I need to sizing a voice gateway for an IP telefony provider. He has an Ip PBX asterisk in G729 codec and want to comunicatte with PSTN with 4 E1 in G711 codec. The gateway would have to make trascoding of 120 channels.

I think in an Cisco2800 solution but I found the DSP problem with this solution.

I need aid to make the gateway sizing since never I had one of this size.

Thank you very much

[Jaime Valencia]

you can play with the dsp calculator to find a suitable ISR for this, most probably you will need at least a 3725 or 3745 for the 2 E1s and the 120 transcoding sessions

HTH

java

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[pablosorella]

I played with the DSP calculator and I am not sure about the Cisco3800 configuration is the best option.

Has Cisco another gateway option?, or is the 3800 the best option?

Thank you

[Jaime Valencia]

please read carefully my previous post, i never mentioned 3800 series

HTH

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[pablosorella]

I have seen your previous post, but 3700 series is EOS.

[Jaime Valencia]

sorry, was not aware of that. unfortunately any lower platform cannot support what you need for the E1s and the transcoding sessions

HTH

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[CHRIS CHARLEBOIS]

Why do you need so many transcoding sessions?

It might make more sense to split this between a couple 2800 series then to back up the Brinks truck for a 3800 series.