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A circuit line is the physical line that carries frame relay, data, voice, or ATM traffic between customer equipment and an IPX or IGX node. Each piece of equipment in the illustration above is attached to the node through a circuit line. After a card has been "upped" with the upcd command, a circuit line on that card can be "upped" and configured.
This chapter:
The following table shows the permissible card combinations for IPX and IGX circuit lines.
| Type | Country | Electrical Signal Format | Ones Density Requirement | 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, 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, 8 T1 lines on UFM |
| Service | Node Type | Front Card | Back Card |
|---|---|---|---|
| Frame Relay | IGX | UFM-4C, UFM-8C | UFI-8T1-DB15, UFI-8E1-DB15, UFI-8E1-BNC |
| Frame Relay | IPX/IGX | FRP/FRM | FRI/V.35, FRI/X.21 |
| Frame Relay | IPX/IGX | FRP-6, FRP-31/FRM-6, FRM-31 | FRI-T1, FRI-E1 |
| Frame Relay | IPX/IGX | FRP-2, FRM-2 | FRI-2-X.21 |
| Frame Relay | IGX | UFM-Cor UFM-U | UFI-8T1-DB15 UFI-8E1-DB15 or UFI-8E1-BNC |
| High Speed Data | IPX/IGX | SDP/HDM | SDI/RS-232 SDI/V.35 SDI/RS-422 |
| Low Speed Data | IPX/IGX | LDP | LDI4/RS-232 LDI4/DDS LDI8/RS-232 |
| Voice | IPX/IGX | CDP/CVM | BC-T1 BC-E1 BC-J1 |
Frame relay, data, and voice connections require an active circuit line. Use the commands in the following steps to establish a circuit line and its parameters. The card must be active (upcd) before these commands can execute.
Step 1 Use upcln to activate a circuit line in a slot that contains the appropriate circuit line card set.
Step 2 Use cnfcln to configure the circuit line.
The upcln and cnfcln commands establish the general parameters for the circuit line. They do not establish specific frame relay, data, or voice parameters. Refer to the appropriate chapter for details of setting up a particular service on a circuit line/ line. For example, the Data Connections chapter describes specific commands for data connections, and the Frame Relay Connections chapter describes specific commands for frame relay connections.
The following describes related commands.
The following list shows the full command name and starting page for each command description.
| Mnemonic | Description | Page |
|---|---|---|
| cnfcln | Configure circuit line | 6-5 |
| dncln | Down circuit line | 6-8 |
| dspclncnf | Display circuit line configuration | 6-9 |
| dsplcns | Display circuit lines | 6-11 |
| prtclns | Print circuit lines | 6-13 |
| upcln | Up circuit line | 6-14 |
Configures a circuit line to be compatible with the devices to which it connects. See Table 6-2 for information about the appropriate card types for establishing connections to an IPX, IGX, or BPX.
configure circuit line
cnfcln <(see parameters table)>
cnftrk, dsplncnf
Privilege | 1 |
| Jobs | Yes |
| Log | Yes |
| Node | IPX, IGX |
| Lock | Yes |
cnfcln 14
Configure voice circuit line 14.
alpha TRM YourID:1 IPX 16 8.4 Mar. 23 1996 09:55 PST
CLN 14 Configuration T1/24 CDP slot: 13
Loop clock: --
Line framing: --
coding: --
CRC: --
recv impedance: --
E1 signalling: --
encoding: --
T1 signalling: --
cable type: --
length: --
56KBS Bit Pos: --
pct fast modem: --
Last Command: cnfcln 14
Next Command:
cnfcln 7 n 2
Configure a frame relay T1 line for the following options: no loop clock and a receive impedance of 75 ohms.
alpha TRM YourID:1 IPX 16 8.4 Mar. 23 1996 09:55 PST
CLN 14 Configuration T1/24 FRPslot: 13
Loop clock: --
Line framing: ESF
coding: ZCS
CRC: --
recv impedance: --
E1 signalling: --
encoding: --
T1 signalling: --
cable type: ABAH
length: 0-133 ft.
56KBS Bit Pos: --
pct fast modem: --
Last Command: cnfcln 7 n 2
Next Command:
| Parameter | Description | Default |
|---|---|---|
| slot or slot.line | Specifies the line. If the back card has one circuit line connector and cable, enter the slot number. If the card has more than one physical line, include a line number. | |
| loop clock | Enables the transmit and receive control leads to use the same clock. Format for the parameter is Y or N | N |
| line framing | Configures T1 line framing: D4 or ESF. Note that UFM is ESF only. | D4 (ESF on UFM cards) |
| line coding | Configures T1 and E1 coding: | |
| T1: ZCS
B8ZS AMI | ZCS | |
| E1: HDB3
ZCS | HDB3 | |
| line CRC on | Enables CRC-4 detection for E1 lines. Use either Y or N | N |
| E1 recv impedance | Parameter Impedance Description
1 75 ohm unbalanced 2 75 ohm balanced 3 120 ohm balanced 4 0-133 ft ABAM cable 5 133-266 ft ABAM cable 6 266-399 ft ABAM cable 7 399-533 ft ABAM cable | 1 |
| signalling | E1: Common channel signalling (CCS) or ABCD signalling bits with channel associated signalling (CAS) | CAS |
| T1: ABCD or ABAB (with ESF line framing) or AB (with D4 line framing); CCS is available in timeslot 24 if applicable PBXs need it. | AB | |
| encoding | Alaw mlaw | Alaw |
| cable type/length | Parameter Voice Circuits Frame Relay Circuits
1 0-220 ft. MAT cable CSU Network Interface 2 220-440 ft MAT cable 0-133 ft ABAM cable 3 440-655 ft MAT cable 133-266 ft ABAM cable 4 0-133 ft ABAM cable 266-399 ft ABAM cable 5 133-266 ft ABAM cable 399-533 ft ABAM cable 6 266-399 ft ABAM cable 533-655 ft ABAM cable 7 399-533 ft not used 8 533-655 ft not used | 4 |
| 56kbs bit stuffing | most significant byte (msb) least significant byte (lsb) | msb |
| pct fast modem | Expected ADPCM fast connections (range 0-100). High speed modems preclude the use of ADPCM. Consequently, channel load requirements increase over that required for a voice channel. The pct fast modem parameters specify the expected channel utilization (%) by a high speed modem. | 20 |
Deactivates a circuit line. Before you use dncln, use delcon to remove all connections on the line.
down circuit line
dncln
upcln, dspclns
Privilege | 1-2 |
| Jobs | Yes |
| Log | Yes |
| Node | IPX, IGX |
| Lock | Yes |
dncln 12
Deactivate circuit line 12.
| Parameter | Description |
|---|---|
| slot or slot.line | Specifies the line. If the back card has one circuit line connector and cable, enter the slot number. If the card has more than one physical line, include a line number. |
Displays the configuration of a line. Table 6-6 lists the line configuration information displayed.
| Screen Item | Description | Options |
|---|---|---|
| CLN configuration | Line type and the number of channels. | T1 E1 |
| Loop clock | Specifies whether the receive clock is looped back to the transmit clock. | Y N |
| Line framing | Idnetifies the type of T1 line framing used by the circuit line. | DS4 ESF |
| Line coding | Identifies the line coding used by the circuit line. | E1: HDB3, AMI T1: ZCS, B8ZS, AMI |
| CRC | Specifies the CRC checking on E1 lines | Y N |
| recv impedance | Nominal impedance for the receive line. | 75 ohms balanced or unbalanced
120 ohms balanced |
| E1 signalling | Identifies the signalling type used for E1. | CCS or ABCD with CAS |
| encoding | Specifies the voice encoding scheme | mlaw Alaw |
| T1 signalling | Identifies the signalling type used for T1 | ABCD or ABAB (with ESF line framing) or AB (with D4 line framing); CCS is available in timeslot 24 if applicable PBXs need it. |
| Cable type | Specifies the T1 or E1 cable type (used for equalization) | MAT ABAM |
| Cable length | Specifies the T1 or E1 cable length in feet to the CSU or digital cross-connect. | 0-220 220-440 440-655
0-133 133-266 |
display circuit line configuration
dspclcnf
cnfcln
Privilege | 1-6 |
| Jobs | No |
| Log | No |
| Node | IPX, IGX |
| Lock | No |
dspclncnf 9
Displays configuration for line 9.
D2.cb1 LAN StrataCom IPX 32 8.4 Jul. 24 1996 11:53 P
CLN 9 Configuration T1/24 FRP slot: 9
Loop clock: No
Line framing: ESF
coding: B8ZS
CRC: --
recv impedance: --
E1 signalling: --
encoding: --
T1 signalling: --
cable type: ABAM
length: 266-399 ft.
56KBS Bit Pos: --
pct fast modem: --
Last Command: dspclncnf 9
Next Command:
MAJOR ALARM
| Parameter | Description | |
|---|---|---|
| slot or slot.line | Specifies the line. If the back card has one circuit line connector and cable, enter the slot number. If the card has more than one physical line, include a line number. |
Displays configuration information for circuit lines. The information includes the line number, the type of circuit line, and the line alarm status. The line type shows whether the line is J1, T1, or E1 and shows the number of configured channels. Line status categories include:
· Clear--Line OK | Alarm Information Signal |
| · Loss of Signal | Remote Out of Frame (for T1) |
| · Out of Frame (for T1) | Remote Out of Packet Frame |
| · Major--Local CGA (RED) | Minor--Remote CGA (YEL) |
| · Minor--Bad clock source | Loss of Multiframe (for E1) |
display circuit lines
dspclns
dncln, dsptrks, upcln
Privilege | 1-6 |
| Jobs | No |
| Log | No |
| Node | IPX, IGX |
| Lock | No |
dspclns
Displays circuit lines for node.
gamma TRM YourID:1 IPX 16 8.4 Mar. 15 1996 18:08 CST
CLN Type Current Line Alarm Status
14 T1/24 Clear - Line OK
15 T1/24 Clear - Line OK
Last Command: dspclns
Next Command:
Prints the current circuit line configuration for the IPX or IGX node. This command uses the same syntax, and prints the same information as is displayed using the dspclns command. See the dspclns command for syntax and output information.
print circuit line configuration
prtclns
dspclns
Privilege | 1-6 |
| Jobs | Yes |
| Log | No |
| Node | IPX, IGX |
| Lock | Yes |
prtclns
Prints circuit line for the node.
Activates a circuit line on an IPX or IGX. A circuit line consists of a cable for transmitting data and the interface circuitry for the line. The cable can be a coaxial wire, fiber optic, or a twisted pair. See Table 6-2 for information on card combinations.
The upcln command makes the line visible and usable to the network. You must execute upcln at both ends of the line. Executing upcln at only one end of the circuit line eventually causes an alarm. Once both ends of the line are active, you can configure the line's signal characteristics for the data you intend for the circuit line. See cnfcln for information on defining these characteristics.
up circuit line
upcln
cnfcln, dspclns, dncln
Privilege | 1 |
| Jobs | Yes |
| Log | Yes |
| Node | IPX, IGX |
| Lock | Yes |
upcln 5
Activate circuit line 5.
| Parameter | Description |
|---|---|
| slot or slot.line | Specifies the line. If the back card has one line, enter the slot number. If the card has more than one physical line, specify a line number. |
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