TMC recently picked up on a report from Infonetics that reports that Avaya are in a struggle to be top of their field in Enterprise Unified Communications in the US.

The report which covers the first quarter of 2010 states that the acquisition of Nortel by Avaya has allowed them to close on Cisco who currently sit atop the competition in Enterprise VoIP.

Analysts did predict the Nortel deal to be the key event that would put Avaya ahead but issues surrounding the acquisition coupled with Cisco’s strong performance have only enabled Avaya to tie with Cisco at the very most.

The report goes on to point out that Avaya saw a 25% quarterly jump in PBX revenue after absorbing Nortel’s enterprise solutions business, that both Avay and Cisco posted their strongest PBX revenue standings since the end of 2008, and that despite these strong performances, the market overall saw a 4% drop for the quarter.

For more details on the report the TMC article can be found here and the report itself can be downloaded here.