Login to the VLNC60/61/62.

Result:

The User EXEC prompt [(ALU switching)>] displays.

Enter the Global Config mode:

1. From the User EXEC prompt, enter enable to enter the Privileged EXEC mode.

2. From the Privileged EXEC prompt, enter configure to enter the Global Config mode.

From the Global Config mode, enter interface <interface-number> to enter the Interface T1/E1 Config Mode. The interface-number specifies the specific T1/E1 interface on the VLNC60/61/62.

See Addressable Entities in the Alcatel-Lucent 1850 Transport Service Switch (TSS-5) Command Line Interface Guide for addresses and ranges.

This command changes the context to Interface T1/E1 Config Mode and all subsequent configuration in this mode will be applicable to the T1/E1 interface identified by interface-number.

Example: (ALU Switching) (Config)# interface a-1-1

Specify a description for the T1/E1 interface.

From the Interface Config Mode, enter interface <description> where description is in a range of 1-32 alphanumeric character string.

Example: (ALU Switching) (Interface a-1-1)# RemoteSiteSlot1Port1

From the Interface Config Mode, enter the following commands one at a time:

• signalformat {sf | esf | uf} — (T1 only) Used to set the signal format of the T1 interface. The supported formats are: Super Frame (SF), Extended Super Frame (ESF), and Unframed, (UF). Default is esf for T1 port. uf is not allowed when encapsulation is ppp.

  Example: (ALU Switching) (Interface a-1-1)# signalformat esf.

• signalformat {fas | crc4 | uf} — (E1 only) Used to set the signal format of the E1 interface. The supported formats are: Frame Alignment Signal (FAS),Cyclic Redundancy Check-4 multiframe alignment (CRC4) and Unframed, (UF). Default is crc4 for E1 port. uf is not allowed when encapsulation is ppp.

  Example: (ALU Switching) (Interface a-1-1)# signalformat fas.

• linecode {b8zs | ami} — (T1 only) Sets the linecode value on the T1 interface. These are Alternate Mark Inversion (AMI), and Bipolar 8 Zero Substitution (B8ZS). Default is b8zs for T1 port.

  Example: (ALU Switching) (Interface a-1-1)# linecode b8zs.

• linebuildout {short} {{0-110 | 110-220 | 220-330 | 330-440 | 440-550 | 550-660} — (VLNC60/61/62 [T1 only] only) Specifies the length of the cable in feet that connects to the T1 interface on the other end of the VLNC60/61/62 T1 interface.

  Example: (ALU Switching) (Interface a-1-1)# linebuildout short 110-220.

From the Interface T1/E1 Config Mode, enter encapsulation ppp to configure PPP encapsulation with HDLC framing specified.

Example: (ALU Switching) (Interface a-1-1)# encapsulation ppp

By default, the Protocol Field Compression (pfc) on the interface is enabled. If you want to disable pfc, from the Interface T1/E1 Config Mode, enter no ppp pfc.

To enable pfc, enter ppp pfc.

By default, the Address and Control Field Compression (acfc) on the interface is enabled. If you want to disable acfc, from the Interface T1/E1 Config Mode, enter no ppp acfc.

To enable acfc, enter ppp acfc.

The following are optional commands for ppp configuration.

Refer to the following commands in the Alcatel-Lucent 1850 Transport Service Switch (TSS-5) Command Line Interface Guide for details:

• ppp restart-timer number-of-seconds — specifies the LCP restart-timer which is the general timer used to time out transmissions of LCP Control packets.

  Example: (ALU Switching) (Interface a-1-1)# ppp restart-timer 5

• ppp max-terminate <number of transmissions> — specifies the maximum terminate value which indicates the number of Terminate-Request packets sent without receiving a valid Terminate-Ack.

  Example: (ALU Switching) (Interface a-1-1)# ppp max-terminate 5

• ppp max-configure <number of transmissions> — specifies the maximum configure value which indicates the number of Configure-Request packets sent without receiving a valid Config-Ack, Config-Nak, or Config-Reject.

  Example: (ALU Switching) (Interface a-1-1)# ppp max-configure 5

• ppp max-failure <number of transmissions> — specifies the maximum failure value which indicates the number of Configure-NAK packets sent without receiving a valid Config-Ack.

  Example: (ALU Switching) (Interface a-1-1)# ppp max-failure 5

From the Interface T1/E1 Config Mode, enter assign-multilink-group <group-number> command to specify the multilink interface that this interface is associated with. The group-number is in the range 1-8.

This is a mandatory parameter.

Example: (ALU Switching) (Interface a-1-1)# multilink-group 1

From the Interface T1/E1 Config Mode, enter no ppp shutdown to enable PPP on this link.

When PPP is enabled, if the T1/E1 line is not connected or the link is in an alarm state, the PPP protocol will try to send and retransmit PPP request packets at a default rate of every three (3) seconds. If the physical link does not come up or the alarm does not clear within 30 seconds (default), the PPP link state will transit to a stopped state and will continue to be down even after the T1/E1 link comes up or after the alarm clears.

If this occurs, you must enter no ppp shutdown again to enable PPP after the physical link status is good.

The 30 second default transmit rate is derived from ppp configuration parameters, as follows: (ppp restart-timer [default: 3] X ppp max-configure [default: 10]). You can increase this interval by increasing the values of ppp restart-timer and max-configure (See Step 9).

End of steps