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What is DSL?

Digital Subscriber Line (DSL) is technology used for transmitting digital data over existing traditional voice-grade copper telephone cable concurrent with an analog voice signal. The voice signal is carried in lower frequencies while the data is carried in higher frequencies on the same copper twisted pair (local loop). DSL deployment, including subscriber and service provider equipment, is far less costly than installing new, fiber-optic cable along the same path.

DSL technologies have proliferated over recent decades into a family of variations, often summarized as xDSL. Two highly-popular flavors that are widely installed include very-high-bit-rate DSL (VDSL) and single-pair high-speed digital subscriber line (SHDSL), now standardized as G.SHDSL.bis. VDSL modem and G.SHDSL modem functionality today may be embedded a Voice-over-IP gateway, router or enterprise session border controller (eSBC), in which case the device is called an integrated access device (IAD). Recently DSL has been adapted to support Ethernet-in-the-First-Mile (EFM) applications.

Order the Free Integrated Access Device Product and Solutions Guide


Show Me: VDSL & G.SHDSL Modems, Routers & Access Multiplexors

 
 

VDSL2/ADSL2 + Router

OnSite 2201
She may be small, but she packs a punch. The OS2201 supports bridging, static and dynamic routing, IPv4/IPv6, ACLs, TR-069 and a host of firewall/security features. The OS2201 is fully compliant with G.Vector and supports VDSL2 profiles from 8a to 30a.

G.SHDSL.bis EFM IAD

OnSite 3300
Bonding up to 4 twisted-pairs (8-wire), multiple bandwidth options combined with a rich software suite, the OS3300 is the ideal integrated access device (IAD) for service providers, campuses, or military/maritime networks that need high-speed EFM services over existing copper facilities.

VDSL2 DSLAM

ForeFront 3210P
This compact 1.5U device offers a 24-port VDSL2 IP DSLAM with 2 Gigabit Ethernet interfaces and a built-in POTS/ISDN splitter. Compliant with the ITU-T G.993.2 standard it supports a VDSL2 30a profile that features 100 Mbps of symmetric data rate over existing copper facilities.

G.SHDSL.bis EFM DSLAM

ForeFront 3310P
EFM bonding over copper wires multiplies the bandwidth of a single twisted-pair link to provide the end-user with a very high-speed uplink and maintain the same distance of the single pair. The end-userís uplink may be from 5.7 Mbps max with one pair up to 22.8 Mbps max with 4 bonded pairs.
 

Teach Me: DSL Applications

 
Typically a DSL deployment involves a DSL modem or DSL router on the subscriber (end-user) premise and a DSL access multiplexor (DSLAM) on the service-provider or central-office side of the connection. Going beyond Internet connectivity, DSL connections are often useful for campus network architecture and military or maritime environments. A chief characteristic on DSL technology is the engineering trade-off between speed (rate) and distance (reach). Another trade-off is the line-rate capacity of symmetrical (equal upstream and downstream) versus asymmetrical (higher downstream) configurations.

Common DSL Applications



The Benefits of DSL Technology
The chief benefit of DSL is that it leverages existing copper twisted-pair cabling infrastructure. That means you can avoid the expense, hassle and delay of replacing your copper facilities with a new CATx or fiber-optic cabling plant. Further, DSL modems, routers and multiplexer offer flexible configurations that allow you to maximize and optimize the rate and reach of each connection based on the detailed wiring characteristics and noise environment.

DSL Terminology
Short Glossary of Related Acronyms
DSL - Digital Subscriber Line
DSLAM - Digital Subscriber Line Access Multiplexer
ADSL - Asycnhronous Digital Subscriber Line
VDSL - Very-high-bit-rate Digital Subscriber Line
SHDSL - single-pair high-speed digital subscriber line
EFM - Ethernet-in-the-First-Mile
IAD - Integrated Access Device
eSBC - Enterprise Session Border Controller
MTU/MDU - Multi-Tennant Unit / Multi-Dwelling Unit
POTS - Plain Old Telephone Service
ISDN - Integrated Services Digital Network



 

Help Me: DSL Networking Technical Help

 
Patton offers an extensive online library of technical information to help you get your OnSite DSL network up and running in a jiffy. Patton's web-based FAQs, technical notes, and user manuals provide the detailed knowledge you need to install, configure, troubleshoot, and maintain your Patton DSL solution. And these helpful resources are all free on www.patton.com. Patton stands behind our high-quality DSL modems, DSL routers, and DSLAM products-with live email and phone support plus lifetime downloadable software updates absolutely free of charge.
 
 
 
G.SHDSL Converged CPE/IAD Products
SmartNode, SN4990
PRI VoIP IAD | 1 or 4 T1/E1/PRI interface for up to 120 simultaneous phone or fax calls with Fiber, G.SHDSL, X.21, ADSL/VDSL
SmartNode, SN5300
eSBC + Router + IAD | Up to 60 SIP Sessions with optional G.SHDSL
SmartNode, SN5490
eSBC + Router + IAD | Up to 60 SIP Sessions with optional G.SHDSL, ADSL/VDSL, X.21, Fiber
SmartNode, SN5540
eSBC + Router | 2, 4 or 8 analog ports for up to 8 phone or fax calls
SmartNode, SN5550
eSBC + Router | 2FXS/2S0 or 4FXS/4S0 ports for up to 8 phone or fax calls
SmartNode, SN5570
eSBC + Router | 1 or 2 T1/E1/PRI interface for up to 30 simultaneous phone or fax calls
G.SHDSL Modems, Bridges & Routers
OnSite, 3086
G.SHDSL Router-Modem with Serial WAN & Ethernet Interfaces
OnSite, 3088A
G.SHDSL.bis Modem, Bridge CPE
OnSite, 3201
2.3 Mbps, G.SHDSL Router
OnSite, 3241
4.6 Mbps, G.SHDSL Router
OnSite, OS2300
G.SHDSL.bis EFM CPE
OnSite, OS3300
G.SHDSL.bis Wire-Bonding EFM Router
Multi-Port G.SHDSL Products
ForeFront, FF3310P
24 port wire bonding G.SHDSL DSLAM
 
VDSL2/ADSL2+ Converged CPE/IAD Products
SmartNode, SN4990
PRI VoIP IAD | 1 or 4 T1/E1/PRI interface for up to 120 simultaneous phone or fax calls with Fiber, G.SHDSL, X.21, ADSL/VDSL
SmartNode, SN5300
eSBC + Router + IAD | Up to 60 SIP Sessions with optional G.SHDSL
SmartNode, SN5490
eSBC + Router + IAD | Up to 60 SIP Sessions with optional G.SHDSL, ADSL/VDSL, X.21, Fiber
SmartNode, SN5530
eSBC + Router | 2 to 8 BRI ports for up to 16 simultaneous phone or fax calls
SmartNode, SN5540
eSBC + Router | 2, 4 or 8 analog ports for up to 8 phone or fax calls
SmartNode, SN5550
eSBC + Router | 2FXS/2S0 or 4FXS/4S0 ports for up to 8 phone or fax calls
SmartNode, SN5570
eSBC + Router | 1 or 2 T1/E1/PRI interface for up to 30 simultaneous phone or fax calls
VDSL2/ADSL2+ Modems, Bridges & Routers
OnSite, 1069
VDSL2 100-Mbps Bridge
OnSite, OS2201
OnSite VDSL2/ADSL2+ Router (Annex A/L/M or B/J)
Multi-Port VDSL2/ADSL2+ Products
ForeFront, FF3210P
24 port VDSL2 DSLAM
 
 
 
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