DS3 Interface

DS3 Interface

Syntax Description

Keywords

Examples

Related Commands

DS3 Interface

This section sets configuration parameters for an internal DSU on the specified WAN interface. DS3 digital transmission has a data capacity of 44.736 Mbps (referred to as Data Speed 3 or DS3).

configure DS3 Interface WAN slot:port

WAN slot:port

Ports are numbered starting with 0, so for a module with one port, the port is 0.

For theVPN 5008 chassis, slot 0 is the far left slot.

For the VPN 5002 chassis, slot 0 is the top slot.

WAN slot:port	Ports are numbered starting with 0, so for a module with one port, the port is 0. For theVPN 5008 chassis, slot 0 is the far left slot. For the VPN 5002 chassis, slot 0 is the top slot.

Keywords

After entering the configure command for the section, enter one or more of the following keywords.

LineBuildOut = {Short | Long}

The LineBuildOut keyword should be set based on the distance between the device and the DS3 terminal located in your building.

Cable lengths from 0 - 100 feet require that LineBuildOut be set to Short.

Cable lengths from 101 - 900 feet require that LineBuildOut be set to Long.

Clocking = {Internal | External}

The Clocking keyword configures whether the DSU will use its own internal clock or obtain the clock from the network to use for the DSU's DS3 transmit signal towards the network.

In Internal mode, an internal clock is used. The default is Internal mode.

In External mode, the clock derived from the DS3 receive signal is used.

Verify this setting with your ISP.

DS3SubRate = {3_158 | 6_316 | 9_474 | 12_632 | 15_790 | 18_948 | 22_106 | 25_264 | 28_422 | 31_580 | 34_738 | 37_896 | 41_054 | 44_210}

The DS3SubRate keyword specifies the data rate for the CSU/DSU. This can be used to set the throughput to match the bandwidth provided by your NSP (Network Service Provider). The values are specified in megabits per second, using an underscore ( _ ) as the decimal point (e.g., 3_158 is 3.158 Mbps). Both ends of the DS3 connection must have the same rate specified. Unless the remote end is a Larscom CSU/DSU (or equivalent) or another Cisco Systems DS3 interface, the default setting of 44_210 must be used.

InvertData = {On | Off}

The InvertData keyword allows the user to invert data. Data inversion can be used to meet pulse density requirements. Always set to Off unless otherwise instructed by your ISP. If a DSU at one end of a DS3 line inverts its data, then the DSU at the other end must do the same.

CRC = {16bit | 32bit}

The CRC keyword configures whether the DSU will use a 16-bit or 32-bit frame check sequence. Both ends of a DS3 connection must use the same CRC (Cyclical Redundancy Check) setting. The default is 16bit.

LineBuildOut = {Short \| Long}	The LineBuildOut keyword should be set based on the distance between the device and the DS3 terminal located in your building. Cable lengths from 0 - 100 feet require that LineBuildOut be set to Short. Cable lengths from 101 - 900 feet require that LineBuildOut be set to Long.
Clocking = {Internal \| External}	The Clocking keyword configures whether the DSU will use its own internal clock or obtain the clock from the network to use for the DSU's DS3 transmit signal towards the network. In Internal mode, an internal clock is used. The default is Internal mode. In External mode, the clock derived from the DS3 receive signal is used. Verify this setting with your ISP.
DS3SubRate = {3_158 \| 6_316 \| 9_474 \| 12_632 \| 15_790 \| 18_948 \| 22_106 \| 25_264 \| 28_422 \| 31_580 \| 34_738 \| 37_896 \| 41_054 \| 44_210}	The DS3SubRate keyword specifies the data rate for the CSU/DSU. This can be used to set the throughput to match the bandwidth provided by your NSP (Network Service Provider). The values are specified in megabits per second, using an underscore ( _ ) as the decimal point (e.g., 3_158 is 3.158 Mbps). Both ends of the DS3 connection must have the same rate specified. Unless the remote end is a Larscom CSU/DSU (or equivalent) or another Cisco Systems DS3 interface, the default setting of 44_210 must be used.
InvertData = {On \| Off}	The InvertData keyword allows the user to invert data. Data inversion can be used to meet pulse density requirements. Always set to Off unless otherwise instructed by your ISP. If a DSU at one end of a DS3 line inverts its data, then the DSU at the other end must do the same.
CRC = {16bit \| 32bit}	The CRC keyword configures whether the DSU will use a 16-bit or 32-bit frame check sequence. Both ends of a DS3 connection must use the same CRC (Cyclical Redundancy Check) setting. The default is 16bit.

Examples

[ DS3 Interface Wan 0:0 ]
LineBuildOut             = Long
CRC                      = 16bit

Related Commands

Command Description

configure Link Config

Configures the interface parameters for a WAN port

set wan ds3

Sets DS3 port hardware parameters

show wan

Shows WAN port information

Command	Description
configure Link Config	Configures the interface parameters for a WAN port
set wan ds3	Sets DS3 port hardware parameters
show wan	Shows WAN port information

Table of Contents

DS3 Interface

Syntax Description

Keywords

Examples

Related Commands