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.

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). Figure 12-2 illustrates this relationship.

Peripheral Component Interconnect

Excel's open architecture, proprietary, 1.3 Gbps fiber optic network using a packet-based protocol.

A digital communications link - voice, data, and video at a 2.048 Mbps rate; 30B/2D or 31B/1D (ISDN); non-North American version of T1.

Digital communications link - voice, data, and video at a 1.544 Mbps rate (24 64 Kbps channels)

Range of channels provided by T1 or E1 transmission service. A physical span is a group of channels taking up a single physical wire. A logical span is a group of channels taking up less than a single logical wire, or carried over more than one physical wire.

H.100 Bus	EXNET Connect XMIT		EXNET Connect XMIT		Voice Resources XMIT		Voice Resources XMIT
Timeslots	E1 Span	E1 Channel	T1 Span	T1 Channel	E1 Span	E1 Channel	T1 Span	T1 Channel
0	0	0	0	0	RCV	RCV	RCV	RCV
:	:	:	:	:	RCV	RCV	RCV	RCV
3	0	3	0	3	RCV	RCV	RCV	RCV
:	:	:	:	:	RCV	RCV	RCV	RCV
:	:	:	:	:	RCV	RCV	RCV	RCV
31	0	31	1	7	RCV	RCV	RCV	RCV
32	1	0	1	8	RCV	RCV	RCV	RCV
:	:	:	:	:	RCV	RCV	RCV	RCV
63	1	31	2	:	RCV	RCV	RCV	RCV
:	:	:	:	:	RCV	RCV	RCV	RCV
2046	63	30	Not used	Not used	RCV	RCV	Not used	Not used
2047	63	31	Not used	Not used	RCV	RCV	Not used	Not used
2048	RCV	RCV	RCV	RCV	0	0	0	0
:	:	:	:	:	:	:	:	:
2079	RCV	RCV	RCV	RCV	0	31	1	7
:	:	:	:	:	:	:	:	:
2082	RCV	RCV	RCV	RCV	1	3	1	11
:	:	:	:	:	:	:	:	:
2111	RCV	RCV	RCV	RCV	2	0	2	16
:	RCV	RCV	RCV	RCV	:	:	:	:
4095	RCV	RCV	Not used	Not used	63	31	Not used	Not used

T1 Logical Spans
Channels 0-23 = Span 0, Channels 24-47 = Span 1, etc.
E1 Logical Spans
Channels 0-31 = Span 0, Channels 32-63 = Span 1, etc.