The total business cap includes fixed voice, internet, wireless broadband and mobile services under a single plan and billing arrangement.
It builds on value cap plans launched by Optus SMB back in August 2008.
Total business cap voice plans start from a bundle of up to three services - fixed lines or mobiles - and costs $149 per month. It ranges up to 75 services that can be bundled together for just under $3,000, including five times that in call value.
The data plans start at $79 per month with a 4GB limit shared between two or three devices. Up to 75 services can run on a $1,499 per month plan that includes 65GB of data to be shared among all users.
Providing plans that enable users to be billed once for internet use, no matter how they access it, is somewhat of a ‘holy grail' among users.
Optus said that while the arrangement applied to SMBs, it had "no immediate plans" to extend the offer to consumer broadband users.
"But we're always looking into new opportunities," an Optus spokesperson said.