The mapping protocols (internally considered as the 'link type') applied on this circuit. The value ranges from 0 to 2047. For point-to-point DLCI, the value stays zero. Otherwise, the value is a sum. It initially takes the value zero, then, for each type of Protocol, 2 raised to a power is added to the sum. The following table presents respective power and equivalent value for each applicable type: Protocol Power Value IP 0 1 IPX 1 2 Appletalk 2 4 XNS 3 8 VINES 4 16 DECnet 5 32 CLNS 6 64 Bridging 7 128 RSRB 8 256 STUN 9 512 LLC2 10 1024 For example, value 3 means the circuit's mapping protocols include IP and IPX. (3 = 2**1 + 2**0, where 0 corresponds to IP and 1 to IPX.) Value 0 means there is currently no mapping protocol for the circuit. See fsfrMapTable for more mapping information.