hi guys with covid 19 my wife now works from home her work is setting up a system which allows her to answer incoming calls to the office they have said to connect a ph to the modum our modum only has one ph line out does optus have dual ph modums one for the home ph and one for the business number
@bradleyfarmiloGoogle search for a SIP phone or SIP adapter and have a read up so you know what you need before speaking with Optus as they will in all probability not be of any help as "the modem only supports one phone" and repeat "the modem ...."
Another thing to search the yescrowd web site for "SIP" and see what other people have done, if anyone has asked before.
All Optus NBN modems have two phone ports (the second one is covered by a removable plug).
Some NBN plans, like the ones listed below, only support one phone line:
You will need to contact Optus directly if you want a second service.