Full H.100 Mode

There are 4096 timeslots available on the H.100 for transmitting and receiving data. The PCI/H.100 EXNET Connect transmits over a maximum of 64 E1 logical spans (2048 channels) or 80 T1 spans (1920 channels). It internally maps logical span/channels to H.100 timeslots depending on the physical span offsets by the host. Timeslots 0 — 2047 are reserved for PCI/H.100 to transmit to voice processing resources over the H.100 bus. Timeslots 2048 — 4095 are available for the other H.100 bus resources to transmit data.

Also, EXNET Connect logically pairs transmit and receive Timeslots offset by 2048 into full duplex channels. For example, Timeslot 0 (transmit) is paired with Timeslot 2048 (receive) to make up Channel 0, Timeslot 1 is paired with Timeslot 2049 to make up Channel 1, etc. EXNET Connect logically groups channels into spans to establish connections based on span/channel assignments.

Example

The EXNET Connect driven timeslots and the voice resource-driven timeslots have a one-to-one correspondence, offset by 2048. For example, timeslots 0 and 2048 create a logical full duplex channel (span 0, channel 0). H.100 Bus Logical Channel Mapping illustrates this relationship.

Figure 12-2 H.100 Bus Logical Channel Mapping