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Chapter 5

CG 6000C Switching

5.1 Introduction

5.2 CG 6000C Switch Model

: 5.2.1 CG 6000C Switching Diagrams
: 5.2.2 Lucent T8105 Switch Blocking

5.3 T1 Trunk Channels and Local Timeslots

: 5.3.1 T1 Channels/Timeslots for Channel Associated Signaling
: 5.3.2 T1 Channels/Timeslots for Common Channel Signaling
: 5.3.3 T1 Channels and Timeslots for RAW Mode

5.4 E1 Trunk Channels and Timeslots

: 5.4.1 E1 Signaling for Channel Associated Signaling
: 5.4.2 E1 Signaling/Timeslots for Common Channel Signaling
: 5.4.3 E1 Channels and Timeslots for RAW Mode

5.5 Default Connections for Standalone Board

5.1 Introduction

This chapter: · Describes the CG 6000C switch model. · Describes how trunk channels interface with H.110 timeslots on CG 6000C boards. · Describes how trunk channels are automatically routed to DSP resources if switching is not enabled. Explains how you can change this default routing by enabling switching.

5.2 CG 6000C Switch Model

In the CG 6000C switch model, specific streams are used in the following way: Local Streams Trunk voice Trunk 1: Streams 0 and 1, timeslots 0..23 (or 29) Trunk 2: Streams 4 and 5, timeslots 0..23 (or 29) Trunk 3: Streams 8 and 9, timeslots 0..23 (or 29) Trunk 4: Streams 12 and 13, timeslots 0..23 (or 29) (With CG 6000C boards configured as T1s, timeslots 0..23 are present. With CG 6000C boards configured as E1s, timeslots 0..29 are present.) Trunk signaling Trunk 1: Streams 2 and 3 Trunk 2: Streams 6 and 7 Trunk 3: Streams10 and 11 Trunk 4: Streams 14 and 15 The timeslots used for the signaling information depend on the board type (T1 or E1) and the board configuration (Trunk[x].TrunkMode). For more information, refer to Section 5.3. DSP voice Streams 16 and 17, timeslots 0..127 DSP signaling Streams 18 and 19, timeslots 0..127 HDLC controllers Trunk 1: Streams 20 and 21, timeslot 0 Trunk 2: Streams 22 and 23, timeslot 0 Trunk 3: Streams 24 and 25, timeslot 0 Trunk 4: Streams 26 and 27, timeslot 0 A switch connection must be made to connect the appropriate signaling stream to the HDLC controller.

Local Streams
Trunk voice	Trunk 1: Streams 0 and 1, timeslots 0..23 (or 29) Trunk 2: Streams 4 and 5, timeslots 0..23 (or 29) Trunk 3: Streams 8 and 9, timeslots 0..23 (or 29) Trunk 4: Streams 12 and 13, timeslots 0..23 (or 29) (With CG 6000C boards configured as T1s, timeslots 0..23 are present. With CG 6000C boards configured as E1s, timeslots 0..29 are present.)
Trunk signaling	Trunk 1: Streams 2 and 3 Trunk 2: Streams 6 and 7 Trunk 3: Streams10 and 11 Trunk 4: Streams 14 and 15 The timeslots used for the signaling information depend on the board type (T1 or E1) and the board configuration (`Trunk[x].TrunkMode`). For more information, refer to Section 5.3.
DSP voice	Streams 16 and 17, timeslots 0..127
DSP signaling	Streams 18 and 19, timeslots 0..127
HDLC controllers	Trunk 1: Streams 20 and 21, timeslot 0 Trunk 2: Streams 22 and 23, timeslot 0 Trunk 3: Streams 24 and 25, timeslot 0 Trunk 4: Streams 26 and 27, timeslot 0 A switch connection must be made to connect the appropriate signaling stream to the HDLC controller.

5.2.1 CG 6000C Switching Diagrams

The following diagrams show CG 6000C switching in CAS, RAW, and PRI modes. Figure 24 shows the CG 6000C switch model in CAS mode. Figure 24. CG 6000C Switch Model: CAS Mode
Figure 26 shows the CG 6000C switch model in RAW mode. Figure 25. CG 6000C Switch Model: RAW Mode
Figure 25 shows the CG 6000C switch model in PRI mode. Figure 26. CG 6000C Switch Model: PRI Mode

5.2.2 Lucent T8105 Switch Blocking

The CG 6000C board switching is implemented by the Lucent T8105 chip (HMIC). The Lucent T8105 chip can perform local bus to local bus switching in full non-blocking way.
The number of H.110 connections are limited to a maximum of 256 full duplex or 512 simplex (or half duplex) connections, in any combination, from either: H.110 bus to the local bus H.110 bus to H.110 bus

5.3 T1 Trunk Channels and Local Timeslots

CG 6000C boards configured as T1 boards place the voice and signaling information from the T1 trunk in timeslots in local streams. The actual timeslots used depend upon how you have configured the CG 6000C board.
The following sections describe how voice and signaling information is mapped to specific streams and timeslots based on the CG 6000C board's NetworkInterface.T1E1[x].SignalingType setting.
For more information about the NetworkInterface.T1E1[x].SignalingType keyword, refer to Chapter 6.

5.3.1 T1 Channels/Timeslots for Channel Associated Signaling

If NetworkInterface.T1E1[x].SignalingType = CAS (its default setting), information is routed to accommodate a T1 channel associated signaling configuration, where: Voice information is transmitted in each channel on the T1 trunk. Signaling information is transmitted in each channel using robbed-bit signaling.
On the local bus, this information is presented as follows: Voice information from each channel is placed in a corresponding timeslot on the local bus in the following streams: - Trunk 1 - stream 0 and stream 1 - Trunk 2 - stream 4 and stream 5 - Trunk 3 - stream 8 and stream 9 - Trunk 4 - stream 12 and stream 13 Signaling information from each channel is placed in a corresponding timeslot on the local bus in the following streams: - Trunk 1 - stream 2 and stream 3 - Trunk 2 - stream 6 and stream 7 - Trunk 3 - stream 10 and stream 11 - Trunk 4 - stream 14 and stream 15 Figure 27. Connecting T1 Timeslots (CAS Mode)

5.3.2 T1 Channels/Timeslots for Common Channel Signaling

If NetworkInterface.T1E1[x].SignalingType = PRI, signaling information is routed to accommodate the T1 ISDN common channel signaling configuration, where: Voice information is transmitted in the first 23 channels. Signaling information is transmitted in the last channel (the D channel).
CG 6000C boards configured as T1s route this information as follows: Each voice channel on the T1 trunk is placed in a corresponding timeslot on the local bus in the following streams: Trunk 1 - stream 0 and stream 1 Trunk 2 - stream 4 and stream 5 Trunk 3 - stream 8 and stream 9 Trunk 4 - stream 12 and stream 13
On CG 6000C boards (unlike AG boards) the framer signaling is hardwired to the HDLCs when the board runs in PRI mode. Any attempts in the PRI mode to switch framer signaling to the HDLCs will fail. Refer to Figure 26 for the PRI switch model. Note: The CG 6000C board does not allow signaling streams to be connected to the CT bus.

5.3.3 T1 Channels and Timeslots for RAW Mode

If NetworkInterface.T1E1[x].SignalingType = RAW, information is routed to accommodate a configuration where no D channel is present on the T1 trunk (refer to Appendix C): Voice information is transmitted in all 24 channels. No signaling information is transmitted. It is assumed that another T1 trunk is carrying a D channel containing all signaling for all trunks.
CG 6000C boards configured as T1s route this information as follows (refer to Figure 28): Each voice channel on the T1 trunk is placed in a corresponding timeslot on the local bus in the following streams: Trunk 1 - stream 0 and stream 1 Trunk 2 - stream 4 and stream 5 Trunk 3 - stream 8 and stream 9 Trunk 4 - stream 12 and stream 13 Any signaling information is ignored. Figure 28. Connecting T1 Timeslots (RAW Mode)

5.4 E1 Trunk Channels and Timeslots

With CG 6000C boards configured as E1s, NetworkInterface.T1E1[x].SignalingType affects only the way signaling information is routed. Regardless of the NetworkInterface.T1E1[x].SignalingType setting, the CG 6000C board routes the voice information as follows: E1 timeslots 1 through 15 are assigned to the local bus timeslots 0..14 and E1 timeslots 17 through 31 are assigned to the local bus timeslots 15..29 in the following streams: Trunk 1 - stream 0 and stream 1 Trunk 2 - stream 4 and stream 5 Trunk 3 - stream 8 and stream 9 Trunk 4 - stream 12 and stream 13
Figure 29 illustrates how voice channel data is assigned to timeslots: Figure 29. Connecting E1 B Channels to Timeslots

5.4.1 E1 Signaling for Channel Associated Signaling

If NetworkInterface.T1E1[x].SignalingType = CAS (the default setting), signaling information is routed to accommodate an E1 channel associated signaling configuration, where E1 channel 16 carries signaling information for all other channels. The signaling information is broken out and placed on the corresponding signaling stream for that trunk. The signaling information is in the following streams: Trunk 1 - stream 2 and stream 3 Trunk 2 - stream 6 and stream 7 Trunk 3 - stream 10 and stream 11 Trunk 4 - stream 14 and stream 15
The signaling information is placed in the same timeslot number as the voice information for that channel.
Figure 30 illustrates how signaling data is distributed (although the streams are shown here, they cannot be switched to the CT bus): Figure 30. Breaking Out Signaling Information From E1 Stream 16 (CAS Mode)

5.4.2 E1 Signaling/Timeslots for Common Channel Signaling

If NetworkInterface.T1E1[x].SignalingType = PRI, signaling information is routed differently to accommodate an ISDN common channel signaling configuration, where CCS signaling packets are transmitted in channel 16 instead of CAS bits. All signaling information from channel 16 is placed directly into timeslot 0.
On CG 6000C boards (unlike AG boards) framer signaling is hardwired to the HDLCs. Any attempts to switch framer signaling to the HDLCs will fail. Refer to Figure 26 for the PRI switch model. Note: The CG 6000C board does not allow signaling streams to be connected to the CT bus.

5.4.3 E1 Channels and Timeslots for RAW Mode

If NetworkInterface.T1E1[x].SignalingType is set to RAW: Voice information is transmitted in all 31 channels No signaling information is transmitted. It is assumed that another E1 trunk is carrying a D channel containing all signaling for all trunks.
CG 6000C boards configured as E1 route this information as follows (refer to Figure 31): Each voice channel on the trunk is placed in a corresponding timeslot on the local bus in the following streams: Trunk 1 - stream 0 and stream 1 Trunk 2 - stream 4 and stream 5 Trunk 3 - stream 8 and stream 9 Trunk 4 - stream 12 and stream 13 Any signaling information is ignored. Figure 31. Connecting E1 Timeslots (RAW Mode)

5.5 Default Connections for Standalone Board

If a board is configured for standalone operation (Clocking.HBus.ClockMode = STANDALONE), the DSPs and trunks are connected as shown in the following table.
The exact settings for CG 6000C boards configured as T1 depend upon the setting of NetworkInterface.T1E1[x].SignalingType, as shown in this table: Signaling Type Default Routing for CG 6000C Boards Configured as T1 Boards CAS Full duplex connection between trunk voice information and DSP resources: Trunk 1: 0:0..23 => 17:0..23, 16:0..23 => 1:0..23 Trunk 2: 4:0..23 => 17:24..47, 16:24..47 => 5:0..23 Trunk 3: 8:0..23 => 17:48..71, 16:48..71 => 9:0..23 Trunk 4: 12:0..23 => 17:72..95, 16:72..95 => 13:0..23 Full duplex connection between trunk signaling information and DSP resources: Trunk 1: 2:0..23 => 19:0..23, 18:0..23 => 3:0..23 Trunk 2: 6:0..23 => 19:24..47, 18:24..47 => 7:0..23 Trunk 3: 10:0..23 => 19:48..71, 18:48..71 => 11:0..23 Trunk 4: 14:0..23 => 19:72..95, 18:72..95 => 15:0..23 PRI Full duplex connection between trunk voice information and DSP resources: Trunk 1: 0:0..22 => 17:0..22, 16:0..22 => 1:0..22 Trunk 2: 4:0..22 => 17:24..46, 16:24..46 => 5:0..22 Trunk 3: 8:0..22 => 17:48..70, 16:48..70 => 9:0..22 Trunk 4: 12:0..22 => 17:72..94, 16:72..94 => 13:0..22 Note: Timeslots 23, 47, 71, and 95 are unused on streams 16 and 17. On CG 6000C boards (unlike AG boards) the framer signaling is hardwired to the HDLCs. Any attempt to switch framer signaling to the HDLCs will fail. Refer to Figure 26 for the PRI switch model. Note: The CG 6000C board does not allow signaling streams to be connected to the CT bus. Therefore, streams 20 to 27 are not valid. RAW Full duplex connection between trunk voice information and DSP resources: Trunk 1: 0:0..23 => 17:0..23, 16:0..23 => 1:0..23 Trunk 2: 4:0..23 => 17:24..47, 16:24..47 => 5:0..23 Trunk 3: 8:0..23 => 17:48..71, 16:48..71 => 9:0..23 Trunk 4: 12:0..23 => 17:72..95, 16:72..95 => 13:0..23
If a board is configured for standalone operation (Clocking.HBus.ClockMode = STANDALONE), the DSPs and trunks are connected as shown in the following table.The exact settings for CG 6000C boards configured as E1 depend upon the setting of NetworkInterface.T1E1[x].SignalingType, as shown in this table: Signaling Type Default Routing for CG 6000C Boards Configured as E1 Boards CAS Full duplex connection between the trunk voice information and the DSP resources: Trunk 1: 0:0..29 => 17:0..29, 16:0..29 => 1:0..29 Trunk 2: 4:0..29 => 17:30..59, 16:30..59 => 5:0..29 Trunk 3: 8:0..29 => 17:60..89, 16:60..89 => 9:0..29 Trunk 4: 12:0..29 => 17:90..119, 16:90..119 => 13:0..29 Full duplex connection between trunk signaling information and the DSP resources: Trunk 1: 2:0..29 => 19:0..29, 18:0..29 => 3:0..29 Trunk 2: 6:0..29 => 19:30..59, 18:30..59 => 7:0..29 Trunk 3: 10:0..29 => 19:60..89, 18:60..89 =>11:0..29 Trunk 4: 14:0..29 => 19:90..119, 18:90..119 => 15:0..29 PRI Full duplex connection between the trunk voice information and the DSP resources: Trunk 1: 0:0..29 => 17:0..29, 16:0..29 => 1:0..29 Trunk 2: 4:0..29 => 17:30..59, 16:30..59 => 5:0..29 Trunk 3: 8:0..29 => 17:60..89, 16:60..89 => 9:0..29 Trunk 4: 12:0..29 => 17:90..119, 16:90..119 => 13:0..29 On CG 6000C boards (unlike AG boards) the framer signaling is hardwired to the HDLCs. Any attempt to switch framer signaling to the HDLCs will fail. Refer to Figure 26 for the PRI switch model. Note: The CG 6000C board does not allow signaling streams to be connected to the CT bus. Therefore, streams 20 to 27 are not valid. RAW Full duplex connection between trunk voice information and DSP resources: Trunk 1: 0:0..30 => 17:0..30, 16:0..30 => 1:0..30 Trunk 2: 4:0..30 => 17:31..61, 16:31..61 => 5:0..30 Trunk 3: 8:0..30 => 17:62..92, 16:62..92 => 9:0..30 Trunk 4: 12:0..30 => 17:93..123, 16:93..123 => 13:0..30

Signaling Type	Default Routing for CG 6000C Boards Configured as T1 Boards
CAS	Full duplex connection between trunk voice information and DSP resources: Trunk 1: 0:0..23 => 17:0..23, 16:0..23 => 1:0..23 Trunk 2: 4:0..23 => 17:24..47, 16:24..47 => 5:0..23 Trunk 3: 8:0..23 => 17:48..71, 16:48..71 => 9:0..23 Trunk 4: 12:0..23 => 17:72..95, 16:72..95 => 13:0..23 Full duplex connection between trunk signaling information and DSP resources: Trunk 1: 2:0..23 => 19:0..23, 18:0..23 => 3:0..23 Trunk 2: 6:0..23 => 19:24..47, 18:24..47 => 7:0..23 Trunk 3: 10:0..23 => 19:48..71, 18:48..71 => 11:0..23 Trunk 4: 14:0..23 => 19:72..95, 18:72..95 => 15:0..23
PRI	Full duplex connection between trunk voice information and DSP resources: Trunk 1: 0:0..22 => 17:0..22, 16:0..22 => 1:0..22 Trunk 2: 4:0..22 => 17:24..46, 16:24..46 => 5:0..22 Trunk 3: 8:0..22 => 17:48..70, 16:48..70 => 9:0..22 Trunk 4: 12:0..22 => 17:72..94, 16:72..94 => 13:0..22 Note: Timeslots 23, 47, 71, and 95 are unused on streams 16 and 17. On CG 6000C boards (unlike AG boards) the framer signaling is hardwired to the HDLCs. Any attempt to switch framer signaling to the HDLCs will fail. Refer to Figure 26 for the PRI switch model. Note: The CG 6000C board does not allow signaling streams to be connected to the CT bus. Therefore, streams 20 to 27 are not valid.
RAW	Full duplex connection between trunk voice information and DSP resources: Trunk 1: 0:0..23 => 17:0..23, 16:0..23 => 1:0..23 Trunk 2: 4:0..23 => 17:24..47, 16:24..47 => 5:0..23 Trunk 3: 8:0..23 => 17:48..71, 16:48..71 => 9:0..23 Trunk 4: 12:0..23 => 17:72..95, 16:72..95 => 13:0..23

Signaling Type	Default Routing for CG 6000C Boards Configured as E1 Boards
CAS	Full duplex connection between the trunk voice information and the DSP resources: Trunk 1: 0:0..29 => 17:0..29, 16:0..29 => 1:0..29 Trunk 2: 4:0..29 => 17:30..59, 16:30..59 => 5:0..29 Trunk 3: 8:0..29 => 17:60..89, 16:60..89 => 9:0..29 Trunk 4: 12:0..29 => 17:90..119, 16:90..119 => 13:0..29 Full duplex connection between trunk signaling information and the DSP resources: Trunk 1: 2:0..29 => 19:0..29, 18:0..29 => 3:0..29 Trunk 2: 6:0..29 => 19:30..59, 18:30..59 => 7:0..29 Trunk 3: 10:0..29 => 19:60..89, 18:60..89 =>11:0..29 Trunk 4: 14:0..29 => 19:90..119, 18:90..119 => 15:0..29
PRI	Full duplex connection between the trunk voice information and the DSP resources: Trunk 1: 0:0..29 => 17:0..29, 16:0..29 => 1:0..29 Trunk 2: 4:0..29 => 17:30..59, 16:30..59 => 5:0..29 Trunk 3: 8:0..29 => 17:60..89, 16:60..89 => 9:0..29 Trunk 4: 12:0..29 => 17:90..119, 16:90..119 => 13:0..29 On CG 6000C boards (unlike AG boards) the framer signaling is hardwired to the HDLCs. Any attempt to switch framer signaling to the HDLCs will fail. Refer to Figure 26 for the PRI switch model. Note: The CG 6000C board does not allow signaling streams to be connected to the CT bus. Therefore, streams 20 to 27 are not valid.
RAW	Full duplex connection between trunk voice information and DSP resources: Trunk 1: 0:0..30 => 17:0..30, 16:0..30 => 1:0..30 Trunk 2: 4:0..30 => 17:31..61, 16:31..61 => 5:0..30 Trunk 3: 8:0..30 => 17:62..92, 16:62..92 => 9:0..30 Trunk 4: 12:0..30 => 17:93..123, 16:93..123 => 13:0..30

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