Manual - AEQ International

4.4.2.1.2.1. ISDN Configuration.Inside this submenu the available options are the following ones:• Prefix Number: Allows you to introduce regional prefix before the number associatedwith the ISDN interface.• Off-Hook L1 Mode: Allows you to select the way of unhooked (manual or automatic) inthe line 1 of the interface ISDN (first B channel).• Off-Hook L1 Number: Allows you to associate a number with the option of automaticunhooked in line 1, only reacting to calls proceeding from the selected number. For therest of calling numbers, the unit behaves as if the manual unhooked option is selected.• Off-Hook L2 Mode: The same for the line 2 (second B channel).• Off-Hook L2 Number: The same for the line 2 (second B channel).4.4.2.1.2.2 ISDN ParametersDetail of ISDN Config. submenuInside this submenu the available options are the following ones:• Interface: Allows you to select interface ISDN S or ISDN U, depending on the ISDNstandard used.The interface U is the one that joins the telephone central office with the subscriber, istwo wires as in the conventional analogical telephony and only connection admits pointto point (only one device connected to the interface).The interface S/T is obtained from the interface U passing it for the TR1 placed in houseof the subscriber, it is 4 wires and connection admits multipoint of up to 7 devices.In USA the companies do not give the TR1, being the user the one that must install it ifwishes it. Normal situation will be that TR1 does not exist and therefore the access is ininterface U. In short, in USA normal will be the access in interface U unless thesubscriber has requested to the company or installed the same TR1 (the TR1 isnormally a little box anchored to the wall with power cord, some luminous indicator, withexternal line of two wires input and RJ-45 output).• Tei Mode: Terminal Equipment Identifier, allowing to select way of work betweenFIXED or DYNAMIC.• Protocol: Allows you to select EUROISDN or National-1.In USA in spite of several incompatible protocols between, thankfully exists a protocolstandardized enough (named National-1) and that is in the habit of being available in allthe plants. For more information, please consult annexe E.AEQ PHOENIX MOBILE45