Two chief officers, including a board director, will depart embattled telco Optus amid the fallout from the company's failure to connect hundreds of calls for help.

Optus announced on Thursday chief financial officer and board director Michael Venter and chief information officer Mark Potter would leave the company in March.

The Singaporean-owned telco has recently come under scrutiny after bungling the handling of emergency calls to triple zero.

A firewall update caused an outage, which prevented more than 600 calls from connecting in South Australia, the Northern Territory, Western Australia and some parts of NSW in September.

Optus sent emails notifying the federal communications department about the outage to the wrong email address, leaving authorities in the dark for more than a

See Full Page