DS1 is the primary digital telephone standard used in the United States, Canada and Japan and is able to transmit up to 24 multiplexed voice and data calls over telephone lines. E-carrier is used in place of T-carrier outside the United States, Canada, Japan, and South Korea.

DS1 is a digital signal level that is part of a standardized hierarchy or building blocks of digital services for TDM (Time Division Multiplexing) digital lines. A DS1 is a DS1 regardless of whether it is delivered on a T1 line, a microwave relay, a T3 line or a fiber optic carrier.

DS-1 is a communications protocol for multiplexing the bitstreams of up to 24 telephone calls, along with two special bits: a framing bit (for frame synchronization) and a maintenance-signaling bit. T1's maximum data transmission rate is 1.544 megabits per second.

DS1 is an aggregate of 24 DS0 streams while E1 carrier combines 32 or 33 such "clear" channels. While the original T-Carrier DS1 channel did not affect audio, the in-band signalling shared the LSB (least sig. bit) of the voice so it restricted the data to 7bit or 56kbps channels.

2007年8月8日 · e1是2m速率，是中国和欧洲采用的数字通信标准的最基本速率，是30路数字电话速率复用的结果。 t1是1.544m速率，是日本和美国采用的数字通信标准的最基本速率，是24路数字电话速率复用的结果。 ds1是1.544m

When someone says they are running T1, they may be saying several different things: The may mean that they have a network that is passing data at 1.544 Mbps; they may mean that they have a network that conforms to the T1 electrical interface specification (DSX-1), or that they have a network that passes data that conforms to one of the several ...

Digital signal 1 or DS1, also known as T1, sometimes "DS-1" is and are actually the same thing: They are a T-carrier signaling scheme devised by Bell Labs. DS1 is a widely used standard in telecommunications in North America and Japan to transmit voice and data between devices.

受控滑移是数字信号电平 1 (DS1) 帧的有效载荷比特的复制或删除。 当同步接收终端和接收信号之间的计时存在偏差时，可执行受控滑移。 受控滑移不会导致帧频率失调缺陷。 过多的零 (EXZ) 错误事件. AMI 编码信号的 EXZ 错误事件表现为连续出现 15 个以上的零。 对于二进制 8 零替换 (B8ZS) 编码信号，当检测到超过七个连续的零时将出错。 线路编码违规 (LCV) 错误事件. LCV 表现为双极违例错误事件或过多的零错误事件。 路径编码违规 (PCV) 错误事件. PCV 错误事件 …

T1-DS1 is a PCM-based framing and signaling standard for digital voice and data transmission widely used in telecommunications in North America, South Korea and Japan (E1 is the preferred scheme instead of T1 in the rest of the world). Technically, DS1 (Digital Signal 1) is the logical bit pattern (frame format) used over a physical T1 line ...

A DS1 – digital signal, level 1 – is a channel that carries data at 1.544 Mbps. It may be channelized, as in T1 or an unchannelized serial data stream, as in Frame Relay. A DS1 that is channelized into 24 digital voice/data channels, each channel at 64 kbps (called a DS0 – digital signal, level 0), is known as a T1 carrier I.