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This chapter describes how to use the command line interface to configure the ISDN Primary Rate Interface (PRI) Line0 and Line1, and the digital modems on the PortMaster 3. The PortMaster 3 can also use many of the commands common to all PortMaster models.
Note ¯ 
After making any configuration changes to a line (Line0 or Line1), you must use the save all and reboot commands for the changes to take effect.
This chapter discusses the following topics:
Use the following general settings to configure the PortMaster 3.
To display the status of a E1 or T1 line on a PortMaster 3, use the following command:
You can use a line as a single E1 or T1 line, as PRI B channels, as fractional E1 or T1 lines divided into channel groups, or for inband signaling for channelized T1.
Note ¯ 
T1 and E1 lines require an external clock signal provided by the device that the PortMaster is connected to, or by the telephone company network.
To configure a line, use the following command. Table 11-1 explains the line use options.
You can divide the channels of a T1 or E1 line into numbered groups after the line type has been set to fractional with the set Line0 fractional command.
To set the channel group for a T1 or E1 line, use the following command. Table 11-2 explains the channel group options.
To set the channel rate to 56Kbps or 64Kbps for a channel group, use the following command. Table 11-3 explains the channel rate options.
Inband signaling is currently supported for incoming calls for T1 lines only.
To set the inband signaling protocol and the inband call options used with channelized T1, use the following command. Table 11-4 explains the inband signaling protocol options.
Use the following settings to configure ISDN PRI on the PortMaster 3.
The switch type information is available from your ISDN PRI service provider. To set the switch type for ISDN connections to the PortMaster ISDN PRI ports, use the following command-entered on one line. Table 11-5 explains the ISDN switch options.
To set the framing format used for the E1 or T1 line, use the following command. Table 11-6 explains the framing format options.
This command sets the encoding method used with T1 and E1 lines. Table 11-7 explains the encoding method options.
You need to set the pulse code modulation only if you are using digital modems and your PRI service provider instructs you to change the setting to something other than the default. This command sets the digital encoding method used for analog signals.
To set the pulse code modulation, use the following command. Table 11-8 explains the pulse code modulation options.
You can test the telephone line of your T1 or E1 ISDN connection by setting the local network loopback.
To set the loopback, use the following command. Table 11-9 explains the loopback options.
Normally, a T1 or E1 line has a single telephone number. However, when the line is set up as ISDN B channels, you can set a telephone number for an individual port. This feature allows you to identify the circuit telephone number associated with a specific ISDN port.
To set a telephone number for an individual port when the line is configured as ISDN B channels, use the following command. Table 11-10 explains the directory number options.
Use the following settings to configure the built-in digital modems on the PortMaster 3.
The digital modems are numbered from m0 to m59, for a maximum of 60 modems. Modem slot 0 is allocated numbers m0 through m9, modem slot 1 is allocated numbers m10 through m19, and so on. Whether 8-port or 10-port modem cards are installed, the allocation of numbers to the modem slots does not change. For example, an 8-modem card installed in modem slot 0 has modems numbered m0 through m7. Modems on an 8-modem card installed in modem slot 1 are numbered m10 through m17.
To make the digital modems on the PortMaster 3 available or unavailable, use the following command. Table 11-11 explains the digital modem options.
Note ¯ 
Digital modems do not require any configuration or initialization string.
When analog modem service is required for dial-out network connections, you can convert the analog service to digital service.
To set the digital modems of a PortMaster 3 to analog modem service for the specified location, use the following command. Table 11-12 explains the analog modem options.
Use the following command to display the settings for a particular modem:
You can display the status for all digital modems connected to a PortMaster 3. Modem states are as follows:
The PortMaster 3 has an integrated CSU/DSU. However, the other end of a T1/E1 connection might require an external clock signal provided by the telephone company, or a CSU/DSU.
Channelized T1 service provides 24 channels of 56Kbps capacity each. An ISDN PRI line provides 23 channels of 64Kbps capacity each-plus one 64Kbps signaling channel. However, channelized T1 is available in many service areas that do not yet provide ISDN PRI. In areas where PRI is available, the cost of channelized T1 may be significantly less than the cost of PRI.
The telephone company will ask you the following two questions when you order digital service level 1 (DS-1) service:
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You can use either of the following signaling protocols on the PortMaster 3:
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ComOS 3.6-and-later releases require one DNIS digit.
Record the line parameters provided by the telephone company.
Follow these steps to configure the PortMaster 3 to use channelized T1 service:
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Set the line for inband signaling:
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Set the signaling protocol and the line provisioning:
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Set the framing format for the line:
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Set the encoding method for the line:
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Save the configuration changes and reboot:
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Use the following command to display the line configuration:
To configure the Line1 port on a PortMaster 3 for inband, channelized T1 for inbound calls using E & M wink start, extended superframe format, and bipolar 8-zero substitution, use the following commands:
To display the line configuration for line 1, use the following command:
Figure 11-1 shows the result of this command.
Example Line Configuration Display for Line 1
Multichassis PPP allows the use of Multilink PPP across multiple PortMasters in a single telephone hunt group, and on the same Ethernet.
To enable Multichassis PPP, set the endpoint discriminator on all PortMaster products sharing a hunt group and Ethernet, with the same 12-digit hexadecimal number. For convenience, you can use the Ethernet MAC address of one PortMaster as the endpoint discriminator for all the PortMasters on that hunt group, but any 12-digit hexadecimal number will serve.
To enable Multichassis PPP, use the following commands:
Note ¯ 
You must use the save all and reboot commands after issuing the set endpoint command for the endpoint discriminator to take effect.
To display the addresses of the neighboring PortMasters in the same Multichassis PPP group, and a list of connections to virtual and physical ports on the PortMaster, use the following command:
To disconnect a user attached to a virtual port, you must reset the port. Because the virtual port has a corresponding physical port on the slave unit, once the virtual port is reset on the master, its corresponding physical port is also reset on the slave.
When using Multichassis PPP, use this command on the master unit to reset a virtual port:
The debug command is useful for troubleshooting the digital modems and Multichassis PPP events. Output is sent to the system console set by the set console command. After completing the debugging process, disable the debug commands by using the correct set debug off command, and reset the console with the reset console command. Debug information is displayed to the console.
To set debug flags used for troubleshooting, use the following command:
Table 11-13 explains the debug options for the PortMaster 3
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