Configuring ports

The txcfg.txt port command defines a full-duplex connection between the TX board communication controller and a remote SS7 connection over either the H.100/H.110 bus or over one of the boards T1/E1 trunks. Port numbers are specified in the MTP configuration file as Tn where n is the port number.

The port command abstracts the TX boards internal local stream mapping scheme. Define dedicated TDM connections with this command. The connect command is an alternative to the port command to define a pair of half-duplex connections. However, because the connect command does not abstract the TX boards local stream mapping, use the port command for all SS7 TDM connection definitions.

This topic presents:

• Local stream mapping scheme

• Port command

• Connect command

• Examples

Local stream mapping scheme

Each TX board provides a number of SS7 resources (communication controllers) used to terminate SS7 links. For the TX boards, these SS7 resources are addressed on local streams 72 and 73.

Use the txcfg.txt port command to define TDM connections to SS7 resources. A port command for a standard speed link creates two half-duplex TDM connections between the communication controller and either a T1/E1 channel or an H.100/H.110 channel. The timeslot used to connect to the communication controller is always port number - 1. The timeslot used when defining a T1 port is in the range of 0 through 23. The timeslot used when defining an E1 port is in the range of 1 through 31.

The following table presents the local stream mapping scheme:

Port command

The port statement syntax is:

port portnum bus outstream slot speed

where portnum is the port number to define (1 through the maximum number links supported [TX board type specific] or * for HSL) and bus is one of the following values:

where outstream is interpreted based on the value of bus:

where slot is interpreted based on the value of bus:

where speed is one of the following values (not used for HSL):

Connect command

Use the txcfg.txt connect command to define a half-duplex connection between any two TDM endpoints so that TDM timeslots not in use by SS7 links can be switched to other devices. To properly use the connect command, it is important to understand the TX board's local stream mapping scheme.

Note: For connections that terminate SS7 links, use the port command since it abstracts all knowledge of the TX board's internal switching model.

The connect statement syntax is:

connect inbus instream inslot outbus outstream outslot

where inbus specifies the input source and is one of the following values:

where instream is the inbound stream number: 0 through 31 (Hbus); 0 through n (local).

where inslot is the inbound timeslot: 0 through 127 (Hbus); 0 through 31 (local).

where outbus is one of the following values:

where outstream is the outbound stream number: 0 through 31 (Hbus); 0 through n (local).

where outslot is the outbound timeslot: 0 through 127 (Hbus); 0 through 31 (local).

Examples

This section presents the following port configuration examples:

• T1 example

• H.100/H.110 example

• Example mapping of all non-signaling T1 channels (trunk 1) to H.100/H.110

• Example mapping of all non-signaling T1 channels (trunk 2) to trunk 3

• Example mapping of all non-signaling E1 channels (trunk 1) to H.100/H.110

• Example mapping of all non-signaling E1 channels (trunk 2) to trunk 3

T1 example

This command:

port 5 t1 2 7

creates the following TDM connections:

• Local stream 72 timeslot 4 transmitting to local stream 4 timeslot 7

• Local stream 4 timeslot 7 transmitting to local stream 72 timeslot 4

This command creates a full-duplex connection used by the MTP link defined as T5.

Local stream 72 connects to and from the SS7 communication controller with timeslot 4 (port number 5 - 1).

Local stream 4 connects to T1 trunk 2 with timeslot 7 mapping to T1 channel 7.

The same stream numbers are used for input and output connections when the stream is a local stream.

H.100/H.110 example

This command:

port 9 h100 2 7

creates the following TDM connections:

• Local stream 72 timeslot 8 transmitting to H.100 stream 2 timeslot 7

• H.100 stream 3 timeslot 7 transmitting to local stream 72 timeslot 8

This command creates a full-duplex connection used by the MTP link defined as T9.

Local stream 72 connects to and from the SS7 communication controller with timeslot 8 (port number 9 - 1).

H.100 stream 2 is specified as the output stream. This is an even stream number, so the corresponding input stream number is 2 + 1 = 3.

The same stream numbers are used for input and output connections for the local stream (connecting to the communication controller), while different streams are used to connect over the H.100 bus.

Example mapping of all non-signaling T1 channels (trunk 1) to H.100/H.110

This example shows the port and connect commands required to fully access the channels on T1 trunk 1.

The example creates a single SS7 port on T1 channel 0 (trunk 1) and maps all other channels of trunk 1 to the H.100/H.110 bus (transmitting to stream 30 and receiving from stream 31).

Example mapping of all non-signaling T1 channels (trunk 2) to trunk 3

This example shows the port and connect commands required to fully access the channels on T1 trunk 2.

The example creates a single SS7 port on T1 channel 23 (trunk 2) and maps all other channels of trunk 2 to trunk 3.

Example mapping of all non-signaling E1 channels (trunk 1) to H.100/H.110

This example shows the port and connect commands required to fully access the channels on E1 trunk 1.

The example creates a single SS7 port on E1 channel 1 (trunk 1) and maps all other channels of trunk 1 to the H.100/H.110 bus (transmitting to stream 30 and receiving from stream 31).

Example mapping of all non-signaling E1 channels (trunk 2) to trunk 3

This example shows the port and connect commands required to fully access the channels on E1 trunk 2.

The example creates a single SS7 port on E1 channel 31 (trunk 2) and maps all other channels of trunk 2 to trunk 3.