There are different kinds of lock down at the Bexar County Jail. A single inmate can be in permanent or extended lock down or a whole unit can be in lock down.
An individual inmate that is in lock down must spend 23 hours of the day in his cell. Because of these restrictions, the inmate is allowed to make his phone calls during the hour he is out of his cell regardless of what time it is. Each call is limited to 15 minutes. At the end of the 15 minutes the call is automatically disconnected.
A whole unit can be placed on lock down. This is usually done for a major infraction that involved several members of the unit. While in lock down the inmates are not allowed to make any phone calls. Once the lock down has been lifted they return to the usual regulations regarding phone calls from a unit.