===== WAN =====

  * **X.21** - (15-pin D), synchronní
  * **V.35** - (34-pin rectangular), synchronní, až 48kbps
  * **EIA/TIA-612/613** - (60-pin D), až 52Mbps
  * **EIA/TIA-439/530** - (36-pin D), až 2Mbps, (RS-422,RS-423, delší vzdálenosti)
  * **EIA/TIA-232** - (25-pin D), 64kbps, (RS-232, ITU-T V.24, krátké vzdálenosti)

|56|56 Kbps|
|64|64 Kbps|
|T1|1.544 Mbps|
|E1|2.048 Mbps|
|E3|34.064 Mbps|
|T3|44.736 Mbps|
|OC-1|51.84 Mbps|
|OC-3|155.54 Mbps|
|OC-9|466.56 Mbps|
|OC-12|622.08 Mbps|
|OC-18|933.12 Mbps|
|OC-24|1244.16 Mbps|
|OC-36|1866.24 Mbps|
|OC-48|2488.32 Mbps|

  * LAPF - Link Access Procedure for Frame Relay
  * HDLC - High-level Data Link Control
  * PPP - Point-to-Point Protocol

  * Time Division Multiplexing (TDM)
  * Statistical-Time Division Multiplexing (STDM)