# DS1 Subchannel Interfaces

The DS1 Subchannel Interfaces dialog box enables you to configure DSx subchannel interfaces.

## Navigation

1. Right-click on the DSx port, then select Configure > DS1 Subchannel Interfaces from the popup menu.

The following information appears:

> Channel (Channel)

> Index (ifIndex)

> Description (ifDescr)

> Name (ifName)

> Type (ifType)

> Mtu (ifMtu)

> Admin Status (ifAdminStatus)

> Operational Status (ifOperStatus)

> Physical Address (ifPhysAddress)

> Last Change Time (ifLastChange)

## Related Topics

> DS1 Current Statistics

> DS1 Fractional Interfaces

> DS1 Interval Statistics

> DS1 Configuration

> DS1 Total Statistics

### Channel (Channel)

Time slots for a channel group.

### Index (ifIndex)

The unique identifier for an interface.

### Description (ifDescr)

The name of the interface.

### Name (ifName)

The text name for the interface.

### Type (ifType)

The type of the interface.

### Mtu (ifMtu)

Maximum transmission unit. Specifies the size (in octets) of the largest protocol data unit that can be sent to or received by the interface.

### Admin Status (ifAdminStatus)

The administrative status of the interface.

Values are:

up (1) | Operations packets can be passed.
down (2) | When a managed system is initialized, all interfaces starts with ifAdminStatus in this state. Through an explicit management action or according to the configuration information retained by the managed system, ifAdminStatus is then changed to other states.

### Operational Status (ifOperStatus)

The operational status of the interface.

Values are:

up (1) | The packets can be passed.
down (2) |
testing (3) | No packets can be passed.

### Physical Address (ifPhysAddress)

The MAC address of the interface.

### Last Change Time (ifLastChange)

The value of sysUpTime, in hundredths of seconds, when the interface entered its current operating state. (The value is 0 if the current state was entered before the last time the management entity was initialized.)