May 2001System Hardware Manual 2 - 23A6-324000-642-01 – Release 4.0May 20014.2 Cabling Precautions4.2.1 Cable PlacementWhen selecting cables and Main Distribution Frame(MDF), future expansion or assignment changes shouldbe given due consideration. Avoid running cables in thefollowing places:✆ A place exposed to wind or rain.✆ A place near heat radiating equipment or where thequality of station cable covering could be affected bygases and chemicals.✆ An unstable place subject to vibration.✆ Environmental Conditions Temperatures:Operating: 0°C ~ 40°CRecommended Long Term: 10°C ~ 32.2°CHumidity Operating: 10% ~ 90%noncondensingTable 2-4 Cable Connection between an Analogue Interface and a Single LineTelephoneInterfaceEquipment CableMaximum LoopResistance(ohms)Typical Distanceusing Twisted 1-Pair 24AWGAPR-UA ADP Twisted Pair 600 200mSLT(1)-U13 ADP Twisted Pair 600 200mSLI( )-U13 ETU Twisted Pair 950 300mOPX(2)-U13 ETU Twisted Pair 1800 6kmNote 1: Mixing digital and analogue ports though the same 25-pair cableruns is not recommended.Note 2: The Maximum Loop Resistance includes the internal resistanceof the SLT device.Table 2-5 Cabling RequirementsConnected Equipment CableMusic on Hold and Background MusicSources Hi-Fi Shielded Audio CableExternal Amplifier Hi-Fi Shielded Audio Cable
