# ADSL Interface Configuration

The ADSL interface uses Asynchronous Transfer Mode (ATM) as its transport layer. The ADSL interface supports multiple virtual permanent virtual circuits (PVCs) on a single physical line.

The G.symmetric high-speed digital subscriber line (SHDSL) interface supports multi-rate, high-speed, symmetrical digital subscriber line technology for data transfer between a single customer premises equipment (CPE) subscriber and a central office (CO). Unlike ADSL, which was designed for delivering more bandwidth downstream than upstream, SHDSL is symmetrical and delivers a bandwidth of 2.3 Mbps in both directions. The G.SHDSL interface supports ATM-over-SHDSL mode only.

The information that you configure for the ADSL or G.SHDSL interface must match the Digital Subscriber Line Access Multiplexer (DSLAM) for your connection.

To add virtual circuits, you create subinterfaces to the ADSL or G.SHDSL interface. You can configure a sub-interface independently of the main interface: you can configure a different multiplexing method, VPI/VCI, and PPP client on the sub-interface. You can also configure a static IP address on a sub-interface, even if the main interface does not have a static IP address. Note that if a sub-interface and the main ADSL interface can use the same VPI/VCI values if one interface is configured for PPPoA and the other for PPPoE and they both use LLC multiplexing.

### To Configure the Main ADSL or G.SHDSL Interface

1. Enter the required information:

Interface Name: This is read-only for the main ADSL or G.SHDSL interface.

Zone Name: The name of the zone to which the interface is bound.

VPI/VCI: The Virtual Path Identifier and Virtual Channel Identifier values assigned by your service provider.

Quality of Service (QoS): Select one of the following (ADSL mini-PIM only):

- Unspecified Bit Rate (UBR): A service that is often used when transmitting data that can tolerate delays.

- Constant Bit Rate (CBR): A service that is often used when transmitting fixed-rate uncompressed video.

- Variable Bit Rate Non-Real-Time (VBR-NRT): A service that is often used when transmitting compressed packetized voice and video data, such as video-conferencing.

Multiplexing Method: The ATM Adaptation Layer 5 (AAL5) multiplexing method. Select one of the following:

- VC: Virtual Circuit carries each protocol over a separate ATM VC.

- LLC: Logical Link Control allows several protocols to be carried on the same ATM VC.

RFC1483 Protocol Mode:

- Bridged: Select to transport data through bridged protocol data units (PDUs) over AAL5 links.

- Routed: Select to transport data through routed protocol data units (PDUs) over AAL5 links.

Operating Mode (ADSL): Select one of the following:

- Auto is the default and specifies that the ADSL interface automatically negotiate the operating mode with the service provider's DSLAM.

- T1.413 supports the American National Standards Institute (ANSI) TI.413 Issue 2 standard.

- GDMT supports the International Telecommunications Union (ITU) G.992.1 standard.

- ETSI supports the ETSI TS 101 388 V1.3.1 standard.

- UR2 supports the G.992.1 Deutsche Telkom UR-2 standard. Used with Annex B mode.

- NON-UR2 supports the G.992.1 non UR-2 standard. Used with Annex B mode.

- GDMTBIS supports the ITU 992.3 standard.

- ADSL2+ supports the ITU 992.5 standard.

Operating Mode (G.SHDSL): Configure the following:

- Annex: Choose Annex-A for North American network implementations, or choose Annex-B for European network implementations.

- Line Rate: Specifies the available line rate, in kilobits per second, to use on the interface, or choose Auto to auto-negotiate the rate.

- Loopback: Specifies the type of loopback testing for the interface, or choose Unset to disable the loopback test. Choose Local to test the G.SHDSL equipment with local network devices. Choose Remote to test the G.SHDSL equipment with a remote network configuration.

- OAM Liveness: Specifies the operation, administration, and maintenance (OAM) F5 loopback thresholds on ATM virtual circuits.For Down, choose the minimum number of consecutive OAM F5 loopback cells lost before declaring that a VC is down. For Up, choose the minimum number of consecutive OAM F5 loopback cells received before declaring that a VC is up. The default value for both Down and Up is 5.

- OAM Period: Specifies the interval, in seconds, at which OAM cells are transmitted on ATM virtual circuits. The range is 1 to 900 seconds. The default value is 0, which disables OAM period.

- SNR Margin: For Current, choose a value from 0 to 10 dB for the signal-to-noise ratio (SNR) margin. For Snext, choose a value from -10 dB to 10 dB for the self-near-crosstalk (SNEXT) (SNR) margin. The default value for both Current and Snext is 0.

Annex-B Mode: (ForAnnex B models only) Select DeutschTelecom if you are connecting the Annex B model of the device to a DeutschTelecomADSL line. Otherwise, select non-DeutschTelecom.

Obtain IP using DHCP: Select this option to enable the device to receive an IP address for the ADSL interface from an Internet Service Provider (ISP).

Bind to PPPoA: Select this option to bind an instance of PPPoA to the interface. Select the PPPoA instance from the drop-down list.

Create new PPPoA instance: You can configure a new instance of PPPoA, which, once saved, gets added to the drop-down list. See PPPoA Configuration.

Connect: Click this button to initiate a PPPoA session, and Disconnect to terminate the session.

Status: (Read-only) The status of a PPPoA session is indicated as either Disabled (currently inactive) or Enabled (currently in progress).

Bind to PPPoE: Select this option to bind an instance of PPPoE to the interface. Select the PPPoE instance from the drop-down list.

Create new PPPoE instance: You can configure a new instance of PPPoE, which, once saved, gets added to the drop-down list. See PPPoE Configuration.

Connect: Click this button to initiate a PPPoE session, and Disconnect to terminate the session.

Status: (Read-only) The status of a PPPoE session is indicated as either Disabled (currently inactive) or Enabled (currently in progress).

As a Member of Multi-link Interface: Select this option to sent the ADSL interface as a member of a multi-link (ML) interface.

Static IP: If your service provider has assigned a unique and fixed IP address for this interface, select this option.

IP Address/Netmask: Enter the IP Address and netmask of the interface.

Manageable: Select this option to enable management of the device using the interface IP address.

Manage IP: The logical IP address through which you can manage the device. You can set a different Manage IP address on each available interface. The Manage IP address must be on the same subnet as the physical IP address.

Management Services:

WebUI: Select this option to enable management through the Web user interface (WebUI).

SNMP: Select this option to enable the use of SNMP. The device supports the SNMPv1 protocol (described in RFC-1157) and all relevant MIB II (Management Information Base II) groups defined in RFC-1213.

Telnet: Select this option to allow management through a terminal emulation program for TCP/IP networks such as the Internet. Telnet is a common way to remotely control a network device.

SSL: Select this option to allow the interface to receive HTTPS traffic for secure management of the device using the WebUI.

SSH: Select this option to enable management using a secure command shell (SCS). You can administer the device from an Ethernet connection or a dial-in modem using SCS (which is SSH-compatible). To do this, you must have an SCS client that is compatible with Version 1.5 of the SSH protocol. These clients are available for Windows 95, Windows 98, Windows NT, Linux, and UNIX. The device communicates with the SCS client through its built-in SCS server, which provides device configuration and management services.

Other Services:

Ping: Select this option to allow the device to respond to ICMP echo requests, or "pings". Ping is a utility that determines whether a specific IP address is accessible or not.

Ident-reset: Services like Mail and FTP send identification requests. If they receive no acknowledgment, they send the request again. While the request is processing, there is no user access. An ident-reset restores access that has been blocked by an unacknowledged identification request.

WebAuth: (Appears only when you enter and save a static IP address and netmask.) Select this option to enable WebAuth authentication through this interface. Enter the IP address of the WebAuth server performing the authentication.

Traffic Bandwidth: The traffic bandwidth in kilobits per second (kbps) that you assign to the interface.

Egress: Bandwidth of traffic leaving the interface.

Ingress: Bandwidth of traffic entering the interface.

2. Click OK to save your changes and return to the Interface List. Click Apply to continue configuring the interface.

### To Configure an ADSL or G.SHDSL Subinterface

1. Enter the required information:

Interface Name: For the ADSL or G.SHDSL sub-interface, you can select the main interface and select the subinterface suffix.

Zone Name: The name of the zone to which the interface is bound.

VPI/VCI: The Virtual Path Identifier and Virtual Channel Identifier values assigned by your service provider.

Multiplexing Method: The ATM Adaptation Layer 5 (AAL5) multiplexing method. Select one of the following:

- VC: Virtual Circuit carries each protocol over a separate ATM VC.

- LLC: Logical Link Control allows several protocols to be carried on the same ATM VC.

RFC1483 Protocol Mode:

- Bridged: Select to transport data through bridged protocol data units (PDUs) over AAL5 links.

- Routed: Select to transport data through routed protocol data units (PDUs) over AAL5 links.

IP Address/Netmask: Enter the IP Address and netmask of the interface.

Manageable: Select this option to enable management of the device using the interface IP address.

Manage IP: The logical IP address through which you can manage the device. You can set a different Manage IP address on each available interface. The Manage IP address must be on the same subnet as the physical IP address.

Service Options

Management Services:

WebUI: Select this option to enable management through the Web user interface (WebUI).

SNMP: Select this option to enable the use of SNMP. The device supports the SNMPv1 protocol (described in RFC-1157) and all relevant MIB II (Management Information Base II) groups defined in RFC-1213.

Telnet: Select this option to allow management through a terminal emulation program for TCP/IP networks such as the Internet. Telnet is a common way to remotely control a network device.

SSL: Select this option to allow the interface to receive HTTPS traffic for secure management of the device using the WebUI.

SSH: Select this option to enable management using a secure command shell (SCS). You can administer the device from an Ethernet connection or a dial-in modem using SCS (which is SSH-compatible). To do this, you must have an SCS client that is compatible with Version 1.5 of the SSH protocol. These clients are available for Windows 95, Windows 98, Windows NT, Linux, and UNIX. The device communicates with the SCS client through its built-in SCS server, which provides device configuration and management services.

Other Services:

Ping: Select this option to allow the device to respond to ICMP echo requests, or "pings". Ping is a utility that determines whether a specific IP address is accessible or not.

Ident-reset: Services like Mail and FTP send identification requests. If they receive no acknowledgment, they send the request again. While the request is processing, there is no user access. An ident-reset restores access that has been blocked by an unacknowledged identification request.

WebAuth: (Appears only when you enter and save a static IP address and netmask.) Select this option to enable WebAuth authentication through this interface. Enter the IP address of the WebAuth server performing the authentication.

2. Click OK to save your changes and return to the Interface List. Click Apply to continue configuring the interface.