Over 2000.  But it depends on various settings and configurations that can increase or decrease the number of slaves that Sonoma can support.  Consider the following:

1.  If using a Boundary Clock, the Sonoma only interfaces with the network switch Boundary Clock.  In this case the capacity is limited by the Boundary Clock switch.

2.  When using a Transparent Clock, the capacity is limited by the frequency of the delay requests and the sync rate.  Sonoma will be able to provide all the slaves with the Sync Packets and Announce Packets.  But, there will be a limit for processing delay requests issued by the slaves.  Our implementation requires about 10 microseconds to handle a delay request / response.  The delay request is used to calculate the slave-to-master delay.  If your network is static the delay should not change and the Sonoma will announce to the slave to use 32-second delay request interval.

Even though the slaves randomize the delay request packets, the request can come in simultaneously.  What happens if delay requests show up simultaneously?  In this case, the Sonoma will not issue a delay response.  The slave will then randomize the delay request interval and issue the request again.  Some slaves will log a notification that a delay response was not received.