Bandwith by Service or Type

Service or Type Bandwidth Approx time to transmit 680MB (CDROM) for data systems
Telephone Modem 9600 bps 9.6 Kbps 148 hours, 8 mins
Telephone Modem 56k 56 Kbps 24 hours, 41 mins
ISDN BR-1 (single channel) 64 Kbps 22 hours, 13 min
ISDN BR-2 (dual channel) 128 Kbps 11 hrs, 6min
DSL (basic) 384 Kbps / 128 Kbps 3 hrs, 56min / 11 hrs, 48min
Cable (basic) 768 Kbps / 256 Kbps 2 hrs / 5 hrs 54 mins
Dolby Digital Audio 448 Kbps
CD Audio (44.1 Khz) 1.4 Mbps
DAT Audio (48 Khz) 1.5 Mbps
MPEG-1 video 1.5 Mbps
T1 1.544 Mbps 1 hr
DSL (plus) 1.5 Mbps / 128 Kbps 1 hr / 11 hrs, 48min
Cable (plus) 1.5 Mbps / 768 Kbps 1 hr / 2hrs
DSL (bus) 3 Mbps / 384 Kbps 30 min / 3 hrs 56 min
MPEG-2 DVD quality video 6 Mbps
DVD media max bandwidth 10 Mbps
Ethernet (classic) 10 Mbps 9 mins
802.11b WiFi 11 Mbps 8 mins 15 secs
USB 12 Mbps
MPEG-2 HDTV quality video 19.3 Mbps
DV video 25 Mbps
DV stream (DV+DA+timecode) 29 Mbps
DV stream over IP 35 Mbps
SCSI-1 40 Mbps
T3 44.736 Mbps 2 min
OC-1 51.840 Mbps 1 min, 44 sec
802.11a/g WiFi 54 Mbps 1 min, 40 sec
M-JPEG video broadcast quality 72 Mbps
SCSI-2 80 Mbps
100 base-T Ethernet 100 Mbps 1 min, 7 sec
FDDI 100 Mbps 1 min, 7 sec
FireWire/IEEE 1394 100 Mbps
OC-3 155.520 Mbps 34.97 sec
SCSI-2 Fast and Wide 160 Mbps
ITU-R BT.601-4 (uncompressed NTSC video) 168 Mbps
FireWire/IEEE 1394 400 Mbps
OC-12 622.08 Mbps 8.74 sec
HDTV (1125 lines, 60 Hz, 16:9, uncompressed) 952 Mbps
Fiber Channel 1.06 Gbps
Gigabit Ethernet 1.25 Gbps 5 sec
OC-48 2.488 Gbps 2.18 sec
Firewire/IEEE 1394b 3.2 Gbps
OC-192 9.6 Gbps .54sec
OC-1768 38.4 Gbps really fast

Note: Various services support differing distances of communications. This chart only examines optimal bandwidth possible in the communications link using a specific technology.

ISDN = Integrated Services Digital Network (Symetrical)

ISDN is a set of CCITT/ITU standards for digital transmission over ordinary telephone copper wire as well as over other media. There are two levels of service: the Basic Rate Interface (BRI), intended for the home and small enterprise, and the Primary Rate Interface (PRI), for larger users. Both rates include a number of B-channels and a D-channels. Each B-channel carries data, voice, and other services. Each D-channel carries control and signaling information.

DSL = Digital Subscriber Line (Asymmetrical Connection (Recv/Xmit))

DSL refers to different variations of DSL, such as ADSL, HDSL, and RADSL. Assuming your home or small business is close enough to a telephone company central office (around 18,000 feet) that offers DSL service, you may be able to receive data at rates up to 6.1 megabits (millions of bits) per second (of a theoretical 8.448 megabits per second). Typically, individual connections will provide from 1.544 Mbps to 512 Kbps downstream and about 128 Kbps upstream.

CableModem (Asymmetrical Connection (Recv/Xmit))

A cable modem is a device that enables you to hook up your PC to a local cable TV line and receive data at about 1.5 Mbps. The actual bandwidth for Internet service over a cable TV line is up to 27 Mbps on the download path to the subscriber with about 2.5 Mbps of bandwidth for interactive responses in the other direction. However, since the local provider may not be connected to the Internet on a line faster than a T-carrier system at 1.5 Mpbs, a more likely data rate will be close to 1.5 Mpbs.

T1 (Sync)

The T1 (or T-1) carrier is the most commonly used digital line in the United States, Canada, and Japan. In these countries, it carries 24 pulse code modulation (PCM) signals using time-division multiplexing (TDM) at an overall rate of 1.544 million bits per second (Mbps). T1 lines use copper wire and span distances within and between major metropolitan areas. A T1 Outstate System has been developed for longer distances between cities.

OC-1 = Optical Carrier (Sync)

The Synchronous Optical Network (SONET) includes a set of signal rate multiples for transmitting digital signals on optical fiber. The base rate (OC-1) is 51.84 Mbps. Asynchronous transfer mode (ATM) makes use of some of the Optical Carrier levels.