# Working Time Nodelist Flag (FSC-0062)

`CM` (Continuous/Crash Mail) flag indicates that the node is available at any time of day and night. This means that working time of the node is 00:00-24:00.

Availability flag for non-CM nodes indicating the hours during which the node is available in addition to ZMH (see chapter Calling a Node only within its Working Time for ZMH definitions). This must be in accordance with the recommendations in FSC-0062 and the reference table reproduced below. This flag appears in the Nodelist entry as Txy, where x is a symbol for the opening time and y is a symbol for the closing time. All Txy flags must be specified after U, which is an attribute of extended Nodelist flag.

ATTENTION : All times must be UTC (Universal Time Coordinated)!

    A
| 0:00 |  |
    F
| 5:00 |  |
    K
| 10:00 |  |
    P
| 15:00 |  |
    U
| 20:00
    a
| 0:30 |  |
    f
| 5:30 |  |
    k
| 10:30 |  |
    p
| 15:30 |  |
    u
| 20:30
    B
| 1:00 |  |
    G
| 6:00 |  |
    L
| 11:00 |  |
    Q
| 16:00 |  |
    V
| 21:00
    b
| 1:30 |  |
    g
| 6:30 |  |
    l
| 11:30 |  |
    q
| 16:30 |  |
    v
| 21:30
    C
| 2:00 |  |
    H
| 7:00 |  |
    M
| 12:00 |  |
    R
| 17:00 |  |
    W
| 22:00
    c
| 2:30 |  |
    h
| 7:30 |  |
    m
| 12:30 |  |
    r
| 17:30 |  |
    w
| 22:30
    D
| 3:00 |  |
    I
| 8:00 |  |
    N
| 13:00 |  |
    S
| 18:00 |  |
    X
| 23:00
    d
| 3:30 |  |
    i
| 8:30 |  |
    n
| 13:30 |  |
    s
| 18:30 |  |
    x
| 23:30
    E
| 4:00 |  |
    J
| 9:00 |  |
    O
| 14:00 |  |
    T
| 19:00 |  |  |
    e
| 4:30 |  |
    j
| 9:30 |  |
    o
| 14:30 |  |
    t
| 19:30 |  |  |

Argus is using this flag for polling a node in its working time.

Argus allows the combing of working time intervals by using several `Txy` flags. For example, `TCh, TSW` means that node is available 2:00-6:30 and 18:00-22:00 UTC.

Argus also supports `TxyL` extension - it is the same as `Txy`, but indicating that the time is local, not UTC. For example, `TCSL` means 2:00-18:00 local time.

`CM` flag is equivalent to `U,TAA`.