Yes, SPAN source and destination ports are in same physical switch.
My explanation may not have been enough ...
MS on right side is mirroring original packets to left using SPAN.
MS on left side connects the server and MS on right side with the same VLAN.
server ---- MS(L2 transfer) ---- MS(SPAN-src/dest) ---- phone
In this situation, can SPANed data reach to server ?
Or is it discarded by MS on left side ?
* I think this is an improper use of MS, but I would like to know if it is technically possible.