Interface Cable Characteristics B-5Interface Cable CharacteristicsWAN Port Connecting Cable – V.11/X.21SupportThe WAN port terminates with a 25-way D-typefemale connector. The port can be configured tosupport V.11 signalling characteristics at data transferrates up to 2.048 Mbps. The WAN port connectingcable is not supplied with the unit. The followingsignalling characteristics should be observed whenpurchasing or fabricating a suitable cable.PinLinks 3Com endpin no.(25-way male)Signal name Client end pinno.(15-way maleD-type connector)2 Transmit Data A (TXDA) 23 Receive Data (RXDA) 47 Signal Ground (ReceiveData)812 Signal Ground13 Indicate B (INDB) 1214 Transmit Data B (TXDB) 915 Indicate A (INDA) 516 Receive Data B (RXDB) 1117 Clock A (CLKA) 619 Clock B (CLKB) 1323 Control B (CTRLB) 1024 Control A (CTRLA) 3Rc.bk : RCAPPB.FRM Page 5 Thursday, July 10, 1997 9:53 AM
