That Iwatsu VS is a nice little system. We just reclaimed 2 - one customer shut down, another went to a hosted system fortunately installed by us. I recently added a 2 cordless phones to the 2 analog ports on a VS. As JBean said the codes 101, 102 etc, can access the individual CO lines - as well as take them off hold. The analog lines can transfer the standard way, preceding the target ext. with a hookflash. When first starting to work on them the COs 10, 11 etc. threw me as JBean mentioned. The small Siemens system also accommodated BRIs.

I wish we also sold Avayas.