Brianna Meizer, 28, was arrested by police in June last year, just weeks after detectives from Strike Force Pinnacle conducted a series of raids on homes of people accused of being apart of a large-scale drug supply network operating from Wellington, NSW.

More than 30 people have been charged over the syndicate as part of what NSW Police Commissioner Mick Fuller described as "one of the biggest operations" he had seen in regional NSW.

The operation's police surveillance activities were behind unveiling Meizer's involvement in the network, court documents revealed.

In June 2019, according to court documents, Meizer was contacted by someone called "Tegan" from Mudgee who requested a "full ball" of ice, which police said equated to 3.5 grams of meth.

After this request, Meizer contacted three men - all involved in the syndicate - and in one conversation said she couldn't access the room where the drugs were kept as she didn't have a key.

She then organised the woman to pick up the men and take her to the room to access the drugs.

Court documents revealed the next day, Meizer was contacted again and asked to supply more ice. She told one of the co-accused she was at the TAB, but could go home if required.

Meizer later sent a text saying she "had 3 I gave her half one so she owe me 15 now [sic]", which police said meant 1.75 grams of ice was exchanged for $300.

A few weeks later, court documents said the alleged senior member of the drug syndicate instructed Meizer to supply three grams of ice for $200.

In other phone interceptions, police said Meizer was heard discussing the price of "bupe" strips with other members of the drug syndicate, and ways drugs could be smuggled to her partner in jail.

Meizer pleaded guilty to one count of supplying 8.25 grams of methylamphetamine and one count of participating in a criminal group and contributing to criminal activity, in Dubbo Local Court last Thursday.

The 28-year-old is on bail and the matter will return to court for sentencing on April 27.

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