MedMan
New member
Re: To MedMan
I am glad you found the survey I did for CA useful. I can't reproduce it here, I'm afraid, as I gathered the information from CA members for the use of CA members.
A couple of thoughts on your other comments:
[ QUOTE ]
How about Centrino wireless networking and SSB SailMail. The latter is very feasible using Pactor III, which can now approach speeds of 14.5K baud.
[/ QUOTE ]
As I understand it, Centrino is nothing more than built-in WiFi - it is not a different technology. I make a brief mention of SSB but as I only have an SSB receiver it is something that I confess I know very little about. I understand that for many folk setting off across oceans, SSB is an essential piece of kit, but for those of us who confine ourselves to the Med it is of questionable value. I have met one or two who have it installed but now that texting can be used to keep in touch with friends somewhere up the coast I would find it very hard to justify the initial cost of the equipment.
[ QUOTE ]
If I do have to send data (very rare) I use Bluetooth connection which though it's far slower than WiFi is more than fast enough for the 9600 baud rate of 2.5GPRS. I've a cheap PCMCIA Bluetooth card slots into the laptop.
[/ QUOTE ]
I'm not sure what you are using your bluetooth for - I guess to connect your laptop to your mobile. As you say, it is more than fast enough to use with GPRS as it is the latter that is the limiting factor in the overall connection. Other readers may find the following list of bandwith figures interesting. In all cases it is the slowest part of the overall connection that determines the speed at which data can be transmitted. Thus, unless you have some other use for it, there is nothing to be gained by using a 802.11g connection rather than 802.11b as it is highly unlikely that the Marina's Internet connection, having been shared amongst all the yachties on line, will be giving you anything even approaching the speed of 802.11b.
Mobile Phone dial-up access 9,600 bits per second
V34 Modem 28,800
GPRS (2.5G) up to 40,000
V90 Modem 56,600
ISDN 128,000
Broadband 512,000
High-speed Broadband 1,000,000
Bluetooth 1,000,000
Low-speed USB (keyboards & mice) 1,500,000
802.11b Min 2,500,000
Max in real world 4,500,000
PCMCIA Interface Min 3,900,000
Ethernet 10,000,000
802.11b Theoretical 11,000,000
USB 1.1 12,000,000
802.11g Theoretical 54,000,000
Fast Ethernet 100,000,000
PCMCIA Interface Max 132,000,000
USB 2.0 480,000,000
I am glad you found the survey I did for CA useful. I can't reproduce it here, I'm afraid, as I gathered the information from CA members for the use of CA members.
A couple of thoughts on your other comments:
[ QUOTE ]
How about Centrino wireless networking and SSB SailMail. The latter is very feasible using Pactor III, which can now approach speeds of 14.5K baud.
[/ QUOTE ]
As I understand it, Centrino is nothing more than built-in WiFi - it is not a different technology. I make a brief mention of SSB but as I only have an SSB receiver it is something that I confess I know very little about. I understand that for many folk setting off across oceans, SSB is an essential piece of kit, but for those of us who confine ourselves to the Med it is of questionable value. I have met one or two who have it installed but now that texting can be used to keep in touch with friends somewhere up the coast I would find it very hard to justify the initial cost of the equipment.
[ QUOTE ]
If I do have to send data (very rare) I use Bluetooth connection which though it's far slower than WiFi is more than fast enough for the 9600 baud rate of 2.5GPRS. I've a cheap PCMCIA Bluetooth card slots into the laptop.
[/ QUOTE ]
I'm not sure what you are using your bluetooth for - I guess to connect your laptop to your mobile. As you say, it is more than fast enough to use with GPRS as it is the latter that is the limiting factor in the overall connection. Other readers may find the following list of bandwith figures interesting. In all cases it is the slowest part of the overall connection that determines the speed at which data can be transmitted. Thus, unless you have some other use for it, there is nothing to be gained by using a 802.11g connection rather than 802.11b as it is highly unlikely that the Marina's Internet connection, having been shared amongst all the yachties on line, will be giving you anything even approaching the speed of 802.11b.
Mobile Phone dial-up access 9,600 bits per second
V34 Modem 28,800
GPRS (2.5G) up to 40,000
V90 Modem 56,600
ISDN 128,000
Broadband 512,000
High-speed Broadband 1,000,000
Bluetooth 1,000,000
Low-speed USB (keyboards & mice) 1,500,000
802.11b Min 2,500,000
Max in real world 4,500,000
PCMCIA Interface Min 3,900,000
Ethernet 10,000,000
802.11b Theoretical 11,000,000
USB 1.1 12,000,000
802.11g Theoretical 54,000,000
Fast Ethernet 100,000,000
PCMCIA Interface Max 132,000,000
USB 2.0 480,000,000