The present invention is directed to N-methyl tetrahydroquinoline compounds of formula which are M1 receptor positive allosteric modulators and that are useful in the treatment of diseases in which the M1 receptor is involved, such as Alzheimer’s disease, schizophrenia, pain or sleep disorders. The method includes checking at least one of data and parameters to be transmitted between the network subscribers, for compatibility. The local commit can be done by the LLR manager in an atomic manner. The new SMT is placed in a separate memory location accessible to the network processors, rather then overwriting the existing SMT. The notch has a triangle cross-section and has a steeper first bottom face and a second bottom face which is more remote from the driving portion than the first bottom face.