[MTP3] Change Over procedure for 2M TDM links

Hi

      I am not sure whether I can send queries regarding MTP3 in this WG. If
I am wrong pls suggest the group from which I can get the below MTP3 query
clarified.

 

My Query:

      Can MTP2 be run on 1.5/2M links ?

 

      In Q.703 it is explained that for the ChangeOver procedures of 2M
links extended sequence number may be used for FSN/BSN transporting. It is
also mentioned that the extended sequence numbers should be of 12 bits in
this case. 

      In the Note(6) page no 82, it refers to Q.2210(MTP3B) specification. 

      

      Does this mean that for 2M MTP2 links XCO/XCA should be exchanged?

 

      But as per this Q.2210 the XCO/XCA use a 24 bit sequence number. But
above in Q.703 only 12 bits is suggested for 2M links. How to use this
XCO/XCA for 2M links ? Can we use least significant 12 bits of the XCO FSN
parameter to convey the 12 bit sequence number ?

 

      Pls help me understand this point.

 

Thanks & Regards

Santhanakrishnan

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