in other situations it may be necessary to support more than one loop pair at a time for lifeline service to provide higher availability of such services this can be accomplished by providing multiple iad cs as illustrated in fig7 which is described in greater detail later herein again using the iad 212 i as an example it consists of the same components devices as those described in the iad 12 i such as the atu r 30 sib 32 dm 34 pm 1 36 1 pmm 36 m and ps 39 the iad 212 i however includes additional components devices such as a relay control block rcb 214 and the bypass relay k b as described above as discussed above during normal vodsl operating condition the atu c 22 i is connected directly to the atu r 30 and the relay k b is energized so that the telephones ph 1 ph m are connected to the phone modules pm 1 36 1 pmm 36 m as in the conventional system however when a power outage or particular components of iad failure occurs at the customer premise the relay k b is de energized causing the connection from telephone ph m to phone module pmm 36 m to be terminated meanwhile the same telephone ph m is connected directly to the tip and ring wires by bypassing the phone module pmm 36 m sib 32 and atu r 30 simultaneously the atu c 22 i recognizes the bypassing of these components through communication protocols between the atu c 22 i and the atu r 30 and reports this event to the oss with this information the oss recognizes the affected.