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Next we tried Vitts. According to Vitts we were only 10.5K feet from the CO. As others have found out
DSL prequalification distance estimates are all over the place. The only way to get an accurate
measurement is to actually have the service installed. We were concerned the estimate might be too low,
but at least it gave us a chance to get the circuit installed. At worst we would have to settle for a lower
speed. We signed up for HomeReach 530 service. This is standard business SDSL 528kbp/s business
service with a relaxed service level agreement (SLA). SDSL requires a dedicated line. Vitts coordinated the
installation of a new line with Verizon. The service was installed and worked flawlessly until Vitts declared
bankruptcy and shutdown in May 2001 leaving us without high-speed access. Once again we were forced
to use dialup. Several other DSL providers service our area but deteriorating financial conditions made the
future look bleak.
Through DSL Reports I learned of Verizon presidential appeals, +1 888.216.1443. Did not hold out much
chance of ever getting DSL but called anyway. Less then four hours later all three phone lines were
qualified and ranked. I held off ordering for a while. At that time Verizon DSL had a pretty bad reputation
and they were changing acceptable use policy to restrict sending email. But I was getting desperate for
high-speed connectivity. Used DSL Reports to check local Verizon customers, got pretty good feedback
about the overall quality of service.
Ordered Verizon 1500/384 DSL in July 2001 with an activation date of early August. ADSL is different
then SDSL because it coexists with existing phone service. This reduces cost but requires a method of
separating DSL from phone signals. Verizon sends out a self-install kit that consists of special account
activation software, DSL modem and microfilters.
4.3 POTS/DSL Splitter vs Microfilters
ADSL requires a filter to isolate DSL from phone voice signals.
To reduce cost consumer grade DSL service typically use
Microfilters. This allows the customer to self-install DSL
eliminating the expense of a truck roll to dispatch a technician.
Microfilters must be installed on every non-DSL device.
An alternative to the microfilter is a single whole house
POTS/DSL splitter. This allows a single device to serve the entire
house. Splitters are especially valuable if you have a large
number of telephone devices or you are far from the telephone
central office. The splitter has better filter characteristics and
being installed at the NID does a very good job isolating inside
telephone wiring from DSL. A good way to see if a splitter will
improve DSL performance is to connect the DSL modem directly
to the Telco NID. This disconnects inside wiring. If performance
improves use a splitter.
The splitter includes half-ringer test circuit on the phone side of
the splitter. This allows the half-ringer in the NID to be
disconnected, further reducing unnecessary loads on DSL.
A single microfilter can be used to supply the entire house but a
purpose built POTS/DSP splitter has better filtering capabilities.
Advantage of Splitter
Single device for entire house
Better electrical characteristics
Isolates inside wiring from DSL
Isolates half-ringer test circuit from DSL
Works with Alarm installation
Figure 2 DSL Microfilter
Figure 3 POTS/DSL Splitter
- Living with a SOHO Network 1
- 2002 edition 1
- Table of Contents 2
- 1 Overview 5
- 2.1 Dialup 7
- 2.2 DSL 7
- 2.2.1 Impairments 8
- 2.2.1.1 Distance 8
- 2.2.1.3 Load Coils 9
- 2.2.1.4 Bridge Taps 9
- 2.2.1.5 Noise and Crosstalk 9
- 2.2.1.6 Half Ringer 9
- 2.2.1.7 Inside Wiring 10
- 2.2.1.8 Wireless Phones 10
- 2.3 Cable Modem 10
- 3.1 Selecting a Provider 12
- 3.2 Acceptable Use Policy 12
- 3.3 Privacy Policy 12
- 3.4 Thoughts about Dial Up 12
- 4.2 Selecting a Provider 13
- 4.4 Installation 15
- 4.5 Optimization 15
- 4.6 Acceptable Use Policy 16
- 4.7 Privacy Policy 16
- 4.8 Service Level Agreement 16
- 4.9 Thoughts about DSL 16
- 5.1 Structured Wiring 17
- 5.3 Patch Cables 19
- 5.6 Type 66 Terminals 20
- 5.6.1 Type 66 Accessories 20
- 5.7 Type 110 Terminals 21
- 5.8 Special Tools 21
- Purpose 21
- 6.3 POTS/DSL Splitter 24
- 6.4 Modem Access Adapter 24
- 6.5 Putting it all together 25
- 7 LAN -- The Networked Home 26
- 10Mbps 5-4-3 Rule 27
- 100Mbps - Class II hub 27
- 100Mbps - Class I hub 27
- 7.1.5 Preferred Topology 28
- 7.2.1 PhoneLine Networking 28
- 7.2.2 RF Wireless 28
- 7.2.2.1 Wireless Security 29
- 7.3 TCP/IP 29
- 7.4 IP Address 29
- 7.4.2 Subnet 30
- 7.4.3 Port Number 30
- 7.4.4 Private Addresses 30
- 7.4.5 AutoIP 31
- 7.4.6 LocalHost Address 31
- 7.5 Gateway 32
- 7.6 Name Resolution 32
- 7.6.1 Naming Convention 32
- 7.7 Whois 32
- 7.9 Implementation 33
- 8.1 WAN Interface 35
- 8.2 Automatic Fail over 35
- 8.2.1 Using multiple ISPs 36
- 8.3 LAN Address Assignment 36
- 8.3.1 Dynamic 36
- 8.3.2 Pseudo Static 36
- 8.3.3 Static 37
- 8.4.1 Limitations of NAT 37
- 8.5 10/100 Ethernet switch 38
- 8.6 Virtual Private Network 38
- 8.7 Logging 39
- 9.1 PING 39
- 9.2 Trace Route 40
- 9.3 NET 41
- 9.4 NETSTAT 41
- 10 Browsing -- Wild Wild Web 42
- 11.1 Browser based Mail 43
- 11.2 Mail Client 43
- 11.3 Corporate Mail 43
- 11.4 SPAM Mitigation 43
- 12 Fax – E-mail on Paper 45
- 15 Printing – Data to Paper 46
- 16 Scanning -- Paper to Data 47
- 17.3 Private Web Server 48
- 17.4 Local Weather Station 48
- 19 Backup – Oops Protection 49
- 19.2 Off Line Backup 50
- 20.1 Firewall 50
- 20.2 Anti Virus Software 50
- 20.4 Spyware 51
- 20.5 Configuration 51
- 20.6 Social Engineering 51
- @Office 52
- On the road 52
- 21.1 Netswitcher 52
- 23.4 Site Logs 55
- 23.5 Email 55
- 25 Conclusions 56
- Happy networking 56
- Last Page 57
- Intentionally Blank 57
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