| Bandwidth Equivalencies
|
| Pipe |
Speed |
Number of DSOs |
Equivalent to |
European Equivalent |
| DSO |
64 Kbps |
1 |
DSO |
64 kbps |
| DS1 |
1.544 Mbps |
24 |
24 DSO |
none (E1=2.048, 32 DSOs) |
| DS3 |
44.736 Mbps |
672 |
28 DS1 |
E3 |
| OC3 |
155.52 Mbps |
2,016 |
3 DS3 |
STM1 |
| OC12 |
622.08 Mbps |
8,064 |
4 OC3 |
STM-4 |
| OC48 |
2.488 Gbps |
32,256 |
4 OC12 |
STM-16 |
| OC192 |
9.953 Gbps |
129,024 |
4 OC48 |
STM-64 |
| OC768 |
39.813 Gbps |
516,096 |
4 OC192 |
|
|
|
| Converged Network
| A single network capable of carrying a mixture of voice (telephone), video (production and training),
and application data.
|
|
| IP Telephony
| A LAN (Local Area Network) based PBX implementing toll-grade voice quality. This is part of
a converged network solution. [see VoIP]
|
|
| MBps
| Mega byte per second
|
|
| mbps
| mega bits per second
|
| OC-XXX (Optical Carrier)
|
| OC-1:
| 51.85 Mbps
|
| OC-3:
| 155.52 Mbps
|
| OC-12:
| 622.08 Mbps
|
| OC-24:
| 1.244 Gbps
|
| OC-48:
| 2.488 Gbps
|
| OC-192:
| 9.952 Gbps
|
|
|
| POTS
| Plain Old Telephone system
|
|
| PRI
| Primary Rate Interchange. Digital telephone services using a T1 line split into 23 voice
or B (bearer) channels,
and 1 signalling or D channel. Also known as Channel Associated Signalling (CAS).
|
|
| PSTN
| Public Switched Telephone Network, also known as your local telephone company.
|
|
| SDH
| Synchronous Digital Hierarchy. International high-speed baseband digital transport
standard specifying
incrementally increasing data stream rates for movement across digital optical links. U.S.
version is called Sonet.
|
|
| SONET
| Synchronous Optical Network. North American high-speed baseband digital transport standard
specifying incrementally increasing data stream rates for movement across digital optical
links.
|
|
| STM-1
| Synchronous Transfer Mode at 155 Mbit/s
|
|
| STM4
| Synchronous Transfer Mode at 622 Mbit/s
|
|
| T1
| A digital link with a carrying capacity of 24 64 kbps channels totalling 1.544 mbps. Each
channel is called a DS0. A T1 is also called a DS1. For telephone services, signalling is
commaonly
referred to as Common Channel Signalling (CCS).
|
|
| T3
| A digital link with a carrying capacity of 45 mbps. A T3, also called a DS3, contains 28
T1 circuits.
|
|
| TDM
| Time Division Multiplexing. Commonly associated with T1 signalling where multiple channels
are assigned
specific slots based upon timing intervals.
|
|
| VoIP
| Voice over IP. A WAN (Wide Area Network) or internet based solution for bypassing telephone company
long distance services. [see IP Telephony]
|