Adtran - Differences between the first and second generation Adtran Total Access 900 Series Gateways

Modified on Thu, Jan 19, 2017 at 8:53 PM

Differences between the first and second generation Adtran Total Access 900 Series Gateways

Posted: February 21, 2012 in Adtran, VoIP Gateway
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There are many used 1st Gen Adtran Total Access 900 Series Gateways out there at much lower prices than the 2nd Gen.

I was curious if there are major differences between the two units.
After some research I found the following:

Feature	1st Gen	2nd Gen
3 Way Conferences via FXS users	0	3
Max TDM to IP Call	24	30
Max T.38 Sessions	1	4
Echo-tail Length	16 ms	64 ms
Supports MGCP	No	Yes
Flash Memory PRI allowed Note: Look for Units with DUAL DSP if needing (2) PRI	32MB 1 T 0/3 only	64MB 2 T 0/3 T 0/4

Based upon Echo-tail length increased to 64ms and the increased number of T.38 faxes I stick to the the 2ng Gen Gateways.