TX boards control TDM switching using a Time Slot Interchanger (TSI) providing local bus to local bus switching in a full non-blocking way.
All TX boards that provide TDM connectivity offer a large number of concurrent connections. The number of H.100/H.110 connections is limited to a maximum of 128 full duplex or 256 simplex (or half duplex) connections, in any combination, from either:
H.100/H.110 bus to the local bus
H.100/H.110 bus to H.100/H.110 bus
PCI Express and CompactPCI TX boards can maintain additional bus switching connections.
The number of H.110 connections is limited to a maximum of 256 full duplex or 512 simplex (or half duplex) connections, in any combination, from either:
H.100/H.110 bus to the local bus
H.100/H.110 bus to H.110 bus