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Configuring the PortMaster 3        11


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:

Configuring General Settings

Use the following general settings to configure the PortMaster 3.

Displaying Line Status

To display the status of a E1 or T1 line, use the following command:

Command> show Line0

Configuring Line Use

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 to which the PortMaster is connected, or by the telephone company network.

To configure a line, use the following command. Table 11-1 explains the line use options.

Command> set Line0 isdn|t1|e1|fractional|inband

Setting Channel Groups

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 11-1 explains the channel group options.

Command> set Line0 group Cgroup|none channels Channel-list

Channel Group Options

Option

Description

Line0

Line0 or Line1.

Cgroup

Group number from 1to 63, or none to unassign channels.

Channel-list

Space separated list of one or more channel numbers, from 1 through 24 for T1, or 1 through 30 for E1. The channel numbers do not have to be contiguous.

Setting the Channel Rate

To set the channel rate to 56Kbps or 64Kbps for a channel group, use the following command. Table 11-2 explains the channel rate options.

Command> set Line0 group Cgroup 56k|64k

Channel Rate Options

Option

Description

Line0

Line0 or Line1.

Cgroup

Defined channel group from 2 to 63.

56k

56Kbps, typically used for D4 framing.

64k

64Kbps, used for framing types other than D4. This is the default.

Setting the Inband Signaling Protocol for T1

To set the inband signaling protocol and the inband call options used with channelized T1, use the following command. Table 11-3 explains the inband signaling protocol options.

Command> set Line0 signaling wink|immediate|fxs

T1 Inband Signaling Protocol Options

Option

Description

Line0

Line0 or Line1.

wink

E & M wink start protocol, an option for use with T1 lines. This is the T1 default.

immediate

E & M immediate start protocol, used with T1 lines.

fxs

Foreign exchange station (FXS) loop start protocol used with T1 lines.

Setting the Inband Signaling Protocol for E1

Although PortMasters do not require dial digits (the calling number and caller ID) when establishing a connection, most Telcos transmit this information by default. You can use the r2gen signalling option if you don't require dial digits, but you must first arrange for the Telco not to transmit these signals.

The PortMaster defaults to r2gen when you set the line to inband (see "Configuring Line Use" on page 11-2).

To accept caller ID and dial digit tones, use the mrf2 option. Because some countries implement different variations of multi-frequency robbed-bit signalling (MFR2), you must specify a profile with the mfr2 option.

To set the inband signaling protocol and the inband call options used with channelized E1, use the following command.

Command> set Line0 signaling mfr2 r2gen|Profile

 Table 11-4 explains the inband signaling protocol options and profiles.
E1 Inband Signaling Protocol Options

Option

Profile

Description

Line0

 

Line0 or Line1.

mfr2

 

Accept caller ID and dial digit tones

 

0

ITU standard, Argentina and Chile. This is the default.

 

1

Mexico.

 

2

Brazil.

 

3

Venezuela.

 

4

Mexico.

r2gen

 

Generic R2, the default; no caller ID and dial digit tones are exchanged.

Configuring ISDN PRI Settings

Use the following settings to configure ISDN PRI on the PortMaster 3.

Setting the ISDN PRI Switch

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.

Command> set isdn-switch ni-2|dms-100|4ess
|att-5ess|net5|vn2|vn3|1tr6|ntt|kdd

 

ISDN Switch Options

ISDN Switch

Description

ni-2

National ISDN-2 (NI-2) compliant. This is the default.

dms-100

Northern Telecom DMS-100 Custom.

4ess

AT&T 4ESS.

att-5ess

AT&T 5ESS.

net5

European ISDN PRI standard.

vn2

France-older switch.

vn3

France-older switch.

1tr6

Germany-older switch.

ntt

Japan.

kdd

Japan.

Setting the Framing Format To set the framing format used for the E1 or T1 line, use the following command. Table 11-6 explains the framing format options.

Command> set Line0 framing esf|d4|crc4|fas

T1 Inband Signaling Protocol Options

Option

Description

Line0

Line0 or Line1.

esf

Extended superframe. This is the default format for T1 lines.

d4

D4 framing, an alternative format for T1 lines.

crc4

Cyclic redundancy check 4. This is the default format for E1 lines.

fas

Frame Alignment Signal, an alternative format for E1 lines.

Setting the Encoding Method

This command sets the encoding method used with T1 and E1 lines. Table 11-7 explains the encoding method options.

Command> set Line0 encoding b8zs|ami|hdb3

Encoding Method Options

Option

Description

Line0

Line0 or Line1.

b8zs

Bipolar 8-zero substitution. This is the default for T1 lines.

ami

Alternate mark inversion.

hdb3

High-density bipolar 3. This is the default for E1 lines.

Setting the Pulse Code Modulation

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.

Command> set Line0 pcm u-law|a-law

Pulse Code Modulation Options

Option

Description

Line0

Line0 or Line1.

u-law

Default method for T1 PRI lines.

a-law

Default method for E1 PRI lines.

Setting the Loopback

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 11-10 explains the loopback options.

Command> set Line0 loopback on|off

Setting the Directory Number

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 11-9 explains the directory number options.

Command> set S0 directory Number

Options

Description

S0

One of the ISDN ports

Number

Access telephone number

Directory Number Options

Using True Digital Modems

Use the following settings to configure the built-in digital modems on the PortMaster 3.

Setting Digital Modems

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 available or unavailable, use the following command. Table 11-10 explains the digital modem options.

Command> set M0 on|off

Digital Modem Options

Option

Description

M0

Any modem number from m0 to m59. Changes to the default setting must be made to individual modems.

on

Make the modem available for use. This is the default.

off

Busy the modem so it is unavailable.

Note ¯ Digital modems do not require any configuration or initialization string.

 

Hot-Swapping Digital Modem Cards

With the lastcall feature, you can hot-swap a modem card without dropping calls. To force an active modem into ADMIN mode as soon as the last active call terminates, use the following command:

Command> set M0 lastcall

When the lastcall feature is set, modem status displayed by the show m0 and show modems commands is ACT(LC).

Setting Digital Modems to Analog Service

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 to analog modem service for the specified location, use the following command. Table 11-11 explains the analog modem options.

Command> set location Locname analog on|off

Analog Modem Options

Option

Description

Locname

Location name that is in the location table.

on

Enables analog modem service on dial-out.

off

Disables analog modem service on dial-out.

Use the following command to display the settings for a particular modem:

Command> show M0

You can display the status for all digital modems. Modem states are as follows:

Using Channelized T1

The PortMaster 3 has an integrated channel service unit/digital service unit (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.

Why Use Channelized T1?

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.

How to Order DS-1 Service from the Telephone Company

The telephone company will ask you the following two questions when you order digital service level 1 (DS-1) service:

You can use either of the following signaling protocols on the PortMaster 3:
ComOS 3.6-and-later releases require one DNIS digit.
Record the line parameters provided by the telephone company.

Configuring the PortMaster 3 for Channelized T1

Follow these steps to configure the PortMaster 3 to use channelized T1 service:

  1. Set the line for inband signaling.

    Command> set Line0 inband

  2. Set the signaling protocol and the line provisioning.

    Command> set Line0 signaling wink|fxs inonly

  3. Set the framing format for the line.

    Command> set Line0 framing esf|d4|crc4|fas

  4. Set the encoding method for the line.

    Command> set Line0 encoding b8zs|ami

  5. Save the configuration changes and reboot.

    Command> save all
    Command> reboot

  6. Use the following command to display the line configuration.

    Command> show Line0

Example Channelized T1 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:

Command> set line1 inband
Command> set line1 signaling wink inonly
Command> set line1 framing esf
Command> set line1 encoding b8zs
Command> save all
Command> reboot

To display the line configuration for line 1, for example, enter the following command:

Command> show line1

----------------------line1 - T1 Inband DS0 ------------------

Status: UP Framing: ESF Encoding: 8ZS PCM: u-law

Signaling: Trunk E&M wink start Options: inbound calls only

Receive Level: +2dB to -7.5dB

Alarms Violations

---------------------------------------------------------------

Blue 0 Bipolar 0

Yellow 1 CRC Errors 0

Receive Carrier Loss 0 Multiframe Sync 0

Loss of Sync 0

Using the T1 Expansion Card

The T1 expansion card is identified as line2 on the PortMaster, and has the same settings as line0 and line1. Valid line types include fractional and T1. All line framing and encoding types are supported. When set to fractional, the card supports only one line group. The first line group found (numerically) is used for the configuration. The fractional line group supports any number of time slots. It also supports 56Kbps channels.

In addition to line2, a new port is added to the list of active ports. In a single-PRI PortMaster 3, the port is identified as W2; in a two-PRI PortMaster 3 it is identified as W48.

If the Stac compression card is present in the PortMaster 3, Stac compression can be enabled for the T1 line.

Although the T1 expansion card is hot-swappable, when you remove the card from the slot you must wait approximately 5 seconds before reinserting it. If you remove the card and reinsert it immediately, the PortMaster locks up and must be restarted.

Clocking

With the T1 expansion card, you can use internal clocking on the line. Use the following command to set clocking:

Command> set line2 clock internal|external

When you specify internal, the built-in 1.544MHz crystal sets timing on the line. This is useful for dry wire configurations, or for back-to-back connections. When you specify external, the built-in DSU/CSU extracts timing from the line.

Configuring the T1 Expansion Card for Fractional T1

The T1 card is identified as line2 in the PortMaster 3. Follow these steps to configure the PortMaster 3 to use fractional T1 service:

  1. Set the line for fractional T1.

    Command> set line2 fractional

  2. Set the channel group for fractional T1.

    Command> set line2 group Cgroup channel Channel-list

  3. Set the channel rate.

    Command> set line2 group Cgroup 56k|64k

    Note ¯ 56Kbps is typically used for D4 framing while 64Kbps, the default, is used for other framing types.

  4. Save the configuration and reboot the PortMaster.

    Command> save all
    Command> reboot

    Note ¯ If you reboot the PortMaster before setting the group and the channel for fractional T1, you lose the line.

Configuring the PortMaster 3 for Full T1

To configure the card for full T1, enter the following commands:

Command> set line2 t1
Command> save all

Troubleshooting the T1 Expansion Card

If the T1 expansion card is not properly installed, the show line2 command displays the following status:

line2 not available

This message indicates that the card is either not present or installed incorrectly. If the card is present, remove it, wait 5 seconds and reinstall it. Refer to your hardware installation guide for instructions.

When you remove the card, the console displays the following message:

Card Service: Stopping wancard in slot 0

When you correctly reinstall the card, the console displays the following message:

Card Service: Starting wancard in slot 0
WANCTL version 0.0
WANCTL: sync_init - found device

Use the show alarms command to determine whether the T1 card is not operating (for example, if the cable is pulled out). The PortMaster does not show an alarm if the card is removed.

Command> show alarms

Alarm Id Age Severity Alarm Message

-------- ------ --------- ------------------

2851352 0 0 T1 line(2) down

Command> show alarm 2851352

---------------- Alarm Details -------------------------

Alarm Id: 2851352 Alarm Message: T1 line(2) down

Age in minutes: 0 Alarm repeated: 1 times

Severity: 0 Reported: SNMP

Using Multichassis PPP

Multichassis PPP allows the use of Multilink PPP across multiple PortMasters in a single telephone hunt group, and on the same Ethernet.

Setting Multichassis PPP

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:

Command> set endpoint Hex
Command> save all
Command> reboot

Note ¯ You must use the save all and reboot commands after issuing the set endpoint command for the endpoint discriminator to take effect.

Displaying Multichassis PPP Addresses

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:

Command> show mcppp

Disconnecting a User from a Virtual Port

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 the following command on the master unit to reset a virtual port:

Command> reset V0

Troubleshooting the PortMaster 3

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-entered on one line:

Command> set debug mdp-status|mdp-events|mcppp-event on|off

 Table 11-12 explains the debug options for the PortMaster 3
Debug Options for the PortMaster 3

Option

Description

mdp-status

Set on to display the status of the digital modems.

mdp-events

Set on to display the progress of the digital modems as they initialize.

mcppp-event

Set on to display all the information related to the Multichassis PPP events.



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