Mr Justice Kearns was also told that all "virtual chat/mess age exchange services" are to carry warnings, at callers' contact, that anyone who sends a message which is "grossly offensive or of an indecent or obscene character" will be guilty of an offence and that all callers must be over 18.
Virtual chat services enable two or more callers to exchange separate recorded messages between each other while connected to the service.
Mc Bain, from Balham, south London, has pleaded guilty to 10 charges relating to the distribution of indecent images while Buckley, of Goole, East Yorkshire, has admitted a single charge of conspiring to distribute images with him.
The court heard they met through another similar channel on the dark web before they decided to set up their own version.
Other lines are being investigated, the court heard.
Two services were deemed to be in breach of the code of practice but were considered less serious and they gave undertakings.
The simplest approach to avoid this problem is to continue to use the Facebook app but not use the in-app browser.
The terms for tightening access to sex chat lines were put forward at the resumed hearing of the action brought by a company director, his partner and her two children to prevent the Eircom Phone Book including sex chat lines.It invited people to take part anonymously in child pornography chat groups.Wilson said the network was run for “self-gratification,” not for money.Four "sex chat" phone lines and another providing access to porn sites have been closed down during the past week, the High Court was told yesterday.The closures have been carried out by the regulator with responsibility for premium rate phone services.Mitigating, Dominic Thomas said Mc Bain was an alcoholic who was "glad" to be arrested to "sort himself out".