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)