The purpose of the Congestion level information element is to describe the congestion status of the call. It is a single octet information element coded as shown in Figure 4-20 and Table 4-14.
Bits  | 
    ||||||||
8  | 
    7  | 
    6  | 
    5  | 
    4  | 
    3  | 
    2  | 
    1  | 
    Octet  | 
  
Congestion level information element identifier  | 
    ||||||||
1  | 
    0  | 
    1  | 
    1  | 
    Congestion level  | 
    1  | 
  |||
Congestion level information element
Congestion level information element
Congestion level (octet 1)  | 
  |
Bits  | 
  |
4 3 2 1  | 
  |
0 0 0 0  | 
    receiver ready  | 
  
1 1 1 1  | 
    receiver not ready  | 
  
All other values are reserved.  | 
  |