Configuring Circuit Lines

A circuit line is the physical line that carries data, voice, Frame Relay, or ATM traffic between a BPX node (or IGX node) and customer premises equipment. Each piece of customer premises equipment is attached to a node through a circuit line.

You must first establish or "up" a card by using the upcd command, before you can "up" and configure a circuit line on that card.

This chapter:

Describes input circuit line formats
Summarizes circuit line card combinations
Explains how to set up lines
Lists circuit line commands

Use the cnfln to configure commands (the cnfcln command is obsolete). The switch software prompts for the parameters appropriate for the card type it detects. For details on each circuit line command, see the Cisco WAN Switching Command Reference. Note: Line commands are the same as "circuit line" commands.

Table 19-1 shows the permissible card combinations for CPE-to-IGX lines.

Table 19-1: Input Line Formats

Type	Country	Electrical Signal Format	Ones Density Enforcement	Multiplexing

J1	Japan	Coded Mark Inversion (CMI)		31 channels @ 64kbps each
E1	Others	Alternate Mark Inversion (AMI)	High density bipolar 3 (HDB3)	31 channels @ 64kbps each 1 E1 line on CDP/CVM, FRP/FRM 8 E1 lines on UFM
T1	USA Canada ASIA	Alternate Mark Inversion (AMI)	Bipolar Zero Substitution (B8ZS)	24 channels @ 64kbps each 1 T1 line on CDP/CVM, FRP/FRM 8 T1 lines on UFM
E3	Europe and others	Physical Layer Convergence Protocol per AT&T publication; ITU I-361 with HEC for E3	HDB3	ITU-T G.804, G.832
T3	USA Canada	Physical Layer Convergence Protocol per AT&T publication TA-TSY-00772 and 000773 for T3	B3ZS+	M13 mode

Table 19-2: Line Card Combinations

Service	Node Type	Front Card	Back Card

ATM	IGX	UXM	BC-UAI BC-UAI BC-UAI-1T1 BC-UAI-1E1 BC-UAI-1OC3
ATM	IGX	ALM/A	BC-UAI-1T3 BC-UAI-1E3
Frame Relay	IGX	UFM-4C, UFM-8C	UFI-8T1-DB15, UFI-8E1-DB15, UFI-8E1-BNC
Frame Relay	IGX	FRP-6, FRP-31/FRM-6, FRM-31	FRI-T1, FRI-E1
Frame Relay	IGX	UFM-C	UFI-8T1-DB15 UFI-8E1-DB15 or UFI-8E1-BNC
High Speed Data	IGX	SDP/HDM	SDI/RS-232 SDI/RS-422
High Speed Data	IGX	SDP/HDM	SDI/RS-232 SDI/RS-422
Voice	IGX	UVM	BC-UVI-2T1EC BC-UVI-2E1EC BC-UVI-2J1EC
Voice	IGX	CDP/CVM	BC-T1 BC-E1 BC-J1

Setting Up a Circuit Line

Frame relay, data, and voice connections require an active line. Before you can execute this procedure, you must first up the card by using upcd.

To establish (or "up") an active line:

Step 1 Make sure the card must be in either the active or standby state

Step 2 Use upln to activate a circuit line in a slot that contains the appropriate circuit line card set.

Step 3 Use cnfln to configure the circuit line.

The upln and cnfln commands establish the general parameters for the line but do not establish specific Frame Relay, data, or voice parameters. Refer to applicable chapters for details on a particular service.

To down a line:

Step 1 Remove all connections on a line by using delcon or delcongrp).

Step 2 Use dnln to down the line. A downed line is inactive, so no signals or statistics are generated.

Flow Diagrams for Line Setup

The command sequences for setting up lines for:

Voice, shown in Figure 19-1
Serial data, shown in Figure 19-2
Frame Relay, shown in Figure 19-3
ATM, shown in Figure 19-4

A yes/no decision branch for "Other Side?" and the vt command in the sequence indicates command sequences on local and far nodes.

"Multiplex" refers to channelized streams.

Figure 19-1: Setting Up Voice Line

Figure 19-2: Setting Up Data Lines

Figure 19-3: Setting Up Frame Relay Lines

Figure 19-4: Setting Up ATM Lines

Line Commands

Table 19-3 Here are the names and descriptions for each line command:

Table 19-3: Line Commands

Name	Description

cnfcassw	Configure CAS switching
cnfln	Configure line (same as cnfcln)
cnfr	Configure resources
dnln	Down line (same as dncln). A downed line is inactive, so no signals or statistics are generated. You must remove all connections on a line (delcon or delcongrp) before you down the line by uising dnln.
dsplncnf	Display line configuration (same as dspclncnf). Displays the configuration of a specified circuit line.
dsplns	Displays the circuit line configuration and alarm status for the node (same as dspclns)
dsptsmap	Display time slot map
prtlns	Prints the circuit line configuration and circuit line alarm status for the node (same as prtclns)
upln	Up line (same as upcln)

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