ny ability of the block is also provided by more uniform use of PL between links. On a link In ISS 4 and 5 are broken into six switchboards – on three on everyone by ISS. So verticals of 1 - 7 MKC4 (form the switchboard of 1 link In, verticals 8 – 13 – the switchboard 2 etc. In exits of switchboards zve-
otvetstviye to modern requirements) in the developed rural network of communication the closed system of numbering (drawing is applied. Thus it should be noted that all stations ATCK-50/200 are modernized, i.e.
kovy is a figure of tens (a field, and in MKC3 – figure of units (a field. At such inclusion of each subscriber line six PL between links will be available And and V. Naprimer intermediate lines 1 – 4 in MKS1 and PL 1, 2 in ISS will be available to the line with number 11
the nent included in 11 it is SCARLET. This call can occupy one of 6 PL between links And and V. Sledovatelno, for a call on 12 will be SCARLET available 5 PL, for a call on 13 is SCARLET – 4 promliniya etc. Thus it is visible that at that is
the lump gradual occupation a promliny call on 17 will not be SCARLET is served because of employment of PL between links And and In, i.e. because of internal blocking. The concept a feather is closely connected with concept of internal blocking -
mine availability. Variable availability – dependence between number of free intermediate lines between links of the switching block and the loading arriving on this block (the more the arriving loading the is less availability). It is possible to tell that variable availability yav-