Chapter 13: Cheaper and better communication

============================================ Packet data services and data transportation services like Tymnet Outdial, Infonet, Internet, and PC Pursuit may help keep costs down. About reducing the cost of using mailing lists. Many users access online services by calling them directly. A lot pay extra for long distance calls to other cities and countries, even when this means inferior transmission quality (like when noise characters degrade the data). Others investigate other routings for their data. One option is the packet data networks. Most countries have Public Data Networks (PDNs) operated by local telecommunications authorities. These services are often cheaper than direct calls for some applications, but more expensive for others. Before using a packet data network, you'll need to establish a "Network User Identification" (NUI) with the PDN carrier. You must also know the Network User Address (NUA) of the hosts that you want to access. In Scandinavia, the local PDNs are called Datapak. They can be accessed by direct local calls or through leased lines. To personal users, direct calls are least expensive. A leased line may be cost efficient when the daily volume is high, like in a company. When you communicate with online services through a PDN, the latter will split your data and bundle it in standard envelopes or 'packets'. Each packet is marked with a code and sent out into the data stream. Based on this code, the packet is routed from computer center to computer center until it reaches its final destination. There, the information will be reassembled into its original form before being handed over to a user or online service. It is almost like traveling by train. The price per packet or traveler is lower than what it costs to rent the whole train for your trip. National telecommunications monopolies were the first to offer packet data services. Their rates were moderately lower than for long distance calls, but it was hard to find the relationship between real costs and prices. This is still the situation in many countries. Throughout the world, efforts to privatize nationwide phone networks continue. In many countries, this has given us some interesting competitors offering attractive rates for similar services. Their rates differ considerably from country to country, as does the quality of transmissions. The advantage of using packet data also varies considerably, by application and by country. The best routing for retrieval of online news may be impossibly expensive for chats or complex online jobs. We can offer no hard rules of thumb, except this: Compare rates regularly! What is cheapest? ----------------- Some networks charge by the hour, while others charge by volume (number of characters transferred per minute). When volume is low, your best bet is to use network services with a low price per minute and high prices for volume. When volume is high, you may be better off using those charging by the minute. To estimate costs reliably, you'll need statistics. Since your usage probably differs from what others do, start accumulating experience data now. Like this: On services only charging for connect time ------------------------------------------ Capture trip information to a log file. Register the following information: * number of minutes connected * modem speed * number of characters transmitted. Some communication programs can do this automatically for you. On services charging for time and volume ---------------------------------------- Log the following information: * number of minutes connected * modem speed * number of segments or packets (measurements of volume) You need this to estimate the average volume of data transferred by minute. Here are some general experiences and hints: Long streams of data without stops are cheaper through services that only charge by the minute. Retrieving software is a typical high volume application. Trips that include navigation from conference to conference, with a little bit of up- and downloading here and there, make the average transfer speed fall dramatically. It's like driving through a big city at 150 kilometers per hour. Red lights will reduce the average speed considerably. The actual transferred volume of text per minute will differ from place to place (geographically), and often also from call to call. It depends on factors like: * How fast you can enter commands and how much time you spend staring at the display before pressing keys, * How long it takes for an online service to react to your commands. For example, the response time on CompuServe at 04:00 GMT on a Friday morning (it is evening in the U.S.) is much worse than at 10:30 GMT on a Sunday morning. Then, most users are asleep. * The load on your packet data network while you use the service (or the amount of noise and retransmission, when calling direct), * The type of modem you are using (speed, level of MNP), * The number of commands you (or your scripts) have to enter during your online visit. An increase in the number of commands, reduces the average transfer speed. * The amount of transfer overhead for color and screen handling (like, VT-100 codes) that is transferred with your text. * Your use of menus and help texts while online, or whether you come as "expert" with a minimum of prompts. It's impossible to calculate the practical effects of these items. You will just have to bear them in mind when estimating typical jobs, measuring speeds, calculating costs, and comparing networks. Finding the optimal network for our needs, will take time, but is well worth the effort. I think the figures may surprise you. The network services in this chapter will often give you better quality transfers than a direct call. On the other hand, calling direct may give more characters transferred per minute. The average speed tends to drop dramatically when using a packet data service. Using national packet data services ----------------------------------- Most commercial online services can be reached through national PDNs, but you may have problems finding the correct NUA (Network User Address) to get there. Few PDNs have a directory of available "electronic telephone numbers" for you to consult. The Norwegian PDN, Datapak, used to be my only alternative for access to foreign online services, and I thought that the cost was acceptable. Not so anymore. My applications require that data be pumped back and forth at maximum speed. On network services charging by a combination of volume and time, 80 percent of my costs are typically for volume, while 20 percent is for connect time. When I log out after a successful visit to CompuServe through Datapak, the two services give me similar reports: Thank you for using CompuServe! Off at 10:11 EST 24-Nov-87 Connect time = 0:15 CLR PAD (00) 00:00:14:55 537 75 The last line comes from Datapak. It tells that I have received 537 segments and sent 75. The "Segment" is Datapak's volume measure. A segment contains up to sixty-four characters and/or carriage returns. The price is calculated accordingly. At today's prices, Datapak is still my cheapest alternative calling CompuServe for chats. I use Datapak when connecting to TWICS in Tokyo, as the only alternative today is direct calls at a prohibitive cost. Once i-Com (see below) starts offering outdial to Japan, I expect this service to be substantially cheaper. The slower your modem speed, the more attractive is Datapak compared with direct calls. To get access to a national PDN, you must have a user identification and a password. (Getting temporary access to PDN services while traveling abroad is often hard and expensive.) | Note: If you have access to a national PDN, but need | | information about PDNs in other countries, try Hostess, the | | Global Network Service's information service from British | | Telecom in England. The NUA is 02342 1920101013 (02342 is | | the Data Network Identifier Code section of the address.) | | Username or password is not required to use this service. | Outdial through PC Pursuit -------------------------- Sprintnet (formerly GTE Telenet) lets American users call bulletin boards in North America at lower rates through their PC Pursuit service. They pay a modest subscription to call a local number for access to PC Pursuit. Once connected, they can enter an electronic phone-number to connect to a so-called 'outdial modem' in another city. Once connected to the outdial modem, they can give it dialing commands and have it call any local number. This way, they can use PC Pursuit to call an online service in the area, or the private modem of a friend. We call PC Pursuit an Outdial service. Such services normally offer lower rates for access to remote bulletin boards than what it costs to call by long distance. Besides, they reduce the chances for noise on the line. Outdial through i-Com --------------------- i-Com offers outdial to North American online services by reselling capacity from Tymnet's network (owned by British Telecommunications PLC). In the United States, Galaxy Telecomm Corp. offers a similar service under the name Starlink. Outdial to numbers in Japan and Europe is planned. i-Com markets its services to users in Europe and Japan, and have local access in Brussels, Paris, Lyon, Milano, the Hague, Eindhoven, Zurich, Geneva, London, Belfast, Birmingham, Bristol, Cambridge, Edinburgh, Leeds, Frankfurt, Cologne, Munich, Madrid, Stockholm, Copenhagen, and more. The basic fee for access to the service is US$25.00 per hour (1992). You don't pay volume charges. The monthly subscription fee is US$8.00. You can pay using VISA or MasterCard/Eurocard. In Norway, I have used i-Com to connect to The Well in San Francisco, MetaNet in Virginia, EXEC-PC in Wisconsin, and SciLink in Toronto, Canada. At the time, i-Com was cheaper than direct calls and Datapak for access to these services. While an ID on your local PDN is only valid in your area or country, your i-Com ID can be used all over the world including several cities in North America. Once your plane has landed in Milano, you can dial the local i-Com node to connect to your favorite service. i-Com also has a bulletin board (US$13.00/hour). These are some of its services: * Search a database to find BBS numbers in a given area of interest, or to locate outdial numbers in a given city or area code. * Conferences about how to use North American bulletin boards. * Retrieval of shareware and public domain software. * Online shopping of American goods at American prices. Cheaper access to CompuServe ---------------------------- Wherever CompuServe has local access points, you'll be better off using these. You do not have to sign any special agreements. Your CompuServe ID is all you need. Payment for using these services will appear on your CompuServe bill. CompuServe has special deals with a list of network services, like InfoNet Europe (formerly Computer Sciences Corp.), Istel, FALNET, FENICS, CompuPass, LATA Networks, Tymnet/Sprintnet. Enter the command GO LOG on CompuServe to get access information, and GO RATES for rates. I have been using CompuPass from Japan, CompuServe's own network in the United States, Istel, InfoNet, and PDN services in Europe. When at home, I usually use CompuServe's 9600 bps node in Stockholm, Sweden. It is even cheaper than calling Oslo for a 2400 bps node for most of my jobs. There is no surcharge when accessing at non-prime time, and US$7.70 per hour during prime time (weekdays 08:00 to 19:00 local time). In addition, I pay long distance rates to call the node. CompuServe has no extra charges for volume. | Whenever CompuServe opens a new node in your vicinity, or | | upgrades the modem speed on one of their nodes, look at the | | effects on your total costs. | | | | Use software for automatic access and navigation (like TAPCIS,| | OzCIS, or ATO). They give higher volume per minute and make | | your accesses even more cost efficient. | Before leaving for a business trip, visit CompuServe to find local access numbers in your destination cities. The list of countries includes Australia, Belgium, Canada, Denmark, Finland, France, Germany, Hong Kong, Italy, Japan, Mexico, Holland, South Africa, Spain, Sweden, Switzerland, and England. You can also access CompuServe through i-Com and other outdial services. CompuServe has exchange of electronic mail with Internet. You can also access the service by telnet to hermes.merit.edu (binary transfers are impossible, though). IXI - a European alternative to PDN ----------------------------------- IXI is an X.25 data network for European academic, industrial and governmental research centers. It is sponsored by the EEC under the ESRIN project, and is operated by the Dutch PTT. IXI interconnects national research networks, many national public data networks and several specialized international networks. It works like a national PDN service, but uses its own Network User Addresses. Echo, STN, DIMDI, Data-Star and other database vendors can be accessed through IXI. The service is not available to most users having email access through the Internet. Using DASnet to cross network boundaries ---------------------------------------- DA Systems forwards electronic mail and files (also binary files) across mailbox system boundaries for customers. They can send your mail to several large in-house systems, information networks, and over 60 commercial mailbox systems in 30 countries. These are some systems on their list: ABA/net, Alternex (Brazil), ATT Mail, BIX, BITNET, CESAC (Italy), CIGnet, ComNet (Switzerland), CONNECT, Dialcom, Deutsche Mailbox, Dialcom, Envoy 100, EIES, EasyLink, Euromail (Germany), FredsNaetet (Sweden), Galaxy, GeoNet (hosts in Germany, England, U.S.A.), GreenNet, INET, INFOTAP (Luxembourg), Mailbox Benelux, MCI Mail, MercanMail (Asia), MBK Mediabox (Germany), MetaNet, Nicarao (Nicaragua), NWI, OTC PeaceNet/EcoNet, Pegasus (Australia), PINET, Portal, PsychNet, San Francisco/Moscow Teleport, Telexphone (France), TeleRede (Portugal), Telehaus Nordhorn (Germany), Telemail, TEXTEL (the Caribbean), TWICS (Japan), UNISON, UUCP, Web (Canada), The WELL, Internet. This list may suggest lack of connectivity between networks that do indeed have connections. For example, Internet email may easily be sent to ATT Mail, Alternex, BIX, BITNET, FredsNaetet, GeoNet, GreenNet, and many others on this list. Connectivity changes constantly. Check to see if you really need it, as this service is far from free. DASnet also lets you send email as telex, fax and by ordinary mail. They charge you by the number of characters transferred, and the destination address. (Contact Anna B. Lange, DA Systems, Inc., U.S.A. Tel.: +1-408-559-7434, or write her at [email protected]). FidoNet - grassroots playground ------------------------------- FidoNet is an amateur network consisting of tens of thousands of bulletin boards all over the world. The network is "loosely coupled," meaning that most of the participating boards are not always connected. They call each others at regular intervals to exchange mail, often in the middle of the night when the rates are low. Most FidoNet boards have conferences, and allow you to send mail to users of other systems. NetMail is a term often used for private FidoNet email. EchoMail is used about its international conferences. The selection of echomail conferences on a given FidoNet board can be as unique as the rest of the system. RelayNet -------- is another global network of bulletin boards. It offers exchange of email between systems. Messages and conference items entered on one system will automatically be copied to other participating boards. Your costs for "talking" with others in other parts of the world are very small. Other grassroots networks ------------------------- It doesn't take much to set up a bulletin board service, and it is as easy to connect BBS systems to each other in a dial-up network for regular exchanges of email, files and conferences. All over the world, grassroots networks keep popping up with names like ILINK, AmNet, Suedd MB-Verbund, Starmail, MagicNet, A- NET, MausNet, Zerberus-Netz, SMBX-NET, BASA-NETZ, you name it. Many boards offer access to more than one grassroots network, as well as to the Internet. Thus, the ability to send global email is extended to new users every day. Other services -------------- The PDN Connect-USA competes with Starlink in North America. (Connect-USA Communications, Inc., 2625 Pennsylvania NE Suite 225, Albuquerque, New Mexico. 505-881-6988 (voice), 505-881-2756 (FAX), 505-881-6964 (BBS). ) Global Access is a similar service reselling time on the Sprintnet network in North America. Reducing the cost of using mailing lists ---------------------------------------- The problem of subscribing to mailing lists is that all discussion items come to you in individual messages. Each message comes with its own mailer header, and this information is generally completely useless. (Read "Returned mail" in Chapter 7 for details.) Newer versions of the BITNET LISTSERV software provide commands that solve this problem: SET DIGEST ---------------------- This command is sent to a LISTSERV to make all daily messages come to you in one, single message. Example: Say you've joined [email protected], which usually has a large number of messages each day. Send the following command to the LISTSERV: SET KIDCAFE DIGEST It will typically reduce the number of lines received from this mailing list by around 50 percent. SET INDEX --------------------- This command is sent to a LISTSERV to get a daily list of messages, like in this example from KIDCAFE: Index Date Size Poster and subject ----- ---- ---- ------------------ 22839 06/22 26 From: David Chalmers Subject: Conor Dublin Ireland Based on this list, you can use the LISTSERV's search commands to retrieve individual messages of interest. These commands are similar to those used for searching in chapter 7. For more about searching mailing lists' message bases, send a message to [email protected] with the following command in the text of your mail: GET KIDLINK TIPS Some LISTSERVs offers simplified search commands and macros to make retrieval of individual messages simpler.