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Chapter 5

Using MVIP Switching

This chapter: Describes the AG 2000 switch model Describes how signaling modules interface with H.100 timeslots on AG 2000 boards Describes how signaling modules are automatically routed to DSP resources if switching is not enabled Explains how you can change this default routing by enabling switching
Refer to Getting Started With MVIP Switching for more information about switching.

Figure 19 shows the AG 2000 switch model. The specific use of each stream is as follows: H.100 Streams H.100 Bus Streams 0..31, timeslots vary based on clock rate: Streams clocked at 8 MHz: timeslots 0..127 Streams clocked at 4 MHz: timeslots 0..63 Streams clocked at 2 MHz: timeslots 0..31 Local Stream Line Interface Voice In and Out Streams 0 and 1, timeslot 0..7 Line Interface Signaling In and Out Streams 2 and 3, timeslot 0..7 DSP Voice In and Out Streams 4 and 5, timeslot 0..7 DSP Signaling In and Out Streams 6 and 7, timeslot 0..7 Figure 19. AG 2000 Switch Model

H.100 Streams
H.100 Bus	Streams 0..31, timeslots vary based on clock rate: Streams clocked at 8 MHz: timeslots 0..127 Streams clocked at 4 MHz: timeslots 0..63 Streams clocked at 2 MHz: timeslots 0..31

Local Stream
Line Interface Voice In and Out	Streams 0 and 1, timeslot 0..7
Line Interface Signaling In and Out	Streams 2 and 3, timeslot 0..7
DSP Voice In and Out	Streams 4 and 5, timeslot 0..7
DSP Signaling In and Out	Streams 6 and 7, timeslot 0..7

Switching on the AG 2000 board is implemented by the HMIC chip. The HMIC can perform local bus to local bus switching in full non-blocking fashion.
The number of H.100 connections is limited to a maximum of 128 full duplex or 256 simplex (or half-duplex) connections, in any combination, from either: H.100 bus to the local bus, or H.100 bus to H.100 bus
There are no restrictions on local switching. Any local device can be connected to any other local device.

On the AG 2000 boards, each signaling module is hardwired to a specific logical timeslot on the local bus. Each signaling module supports four ports of telephone network connectivity and is permanently connected to two RJ-14 connectors (also called a jack). Each jack is therefore bound to the two corresponding timeslots on the local bus. Figure 20 shows the relationship between signaling modules, timeslots, and jacks for AG 2000 boards: Figure 20. Logical Timeslots, Signaling Modules, and RJ-14 Connectors

If MVIP connectivity is disabled in the AG configuration file (EnableMVIP=NO), the following default local connections are nailed up at board initialization: Switch Connection MVIP-95 Full duplex connection between line interface voice information and DSP resources. local:0:0..7 => local:5:0..7 local:4:0..7 => local:1:0..7 Full duplex connection between line interface signaling information and DSP resources. local:2:0..7 => local:7:0..7 local:6:0..7 => local:3:0..7 Note: When MVIP connectivity is enabled, there are no default switch connections. Control switching using the CT Access Switching service.

Switch Connection	MVIP-95
Full duplex connection between line interface voice information and DSP resources.	local:0:0..7 => local:5:0..7 local:4:0..7 => local:1:0..7
Full duplex connection between line interface signaling information and DSP resources.	local:2:0..7 => local:7:0..7 local:6:0..7 => local:3:0..7

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