Nortel Networks i2021 Series Line and Power Connections i2021 Teleset, Switch Settings, TR Switch

i2021 ISDN Teleset

Fig. 2: Line and Power Jacks

Line and Power Connections – i2021 Teleset

The i2021 Teleset must be connected to the line through an NT1 device. This device presents the 2-wire U interface to the line, and the 4-wire S/T interface to the Teleset. The Teleset is powered over the phone line. This method conforms to a standard using one of two different powering methods: PS1or PS2. Powering method PS2 is preferred. Check with your equipment provider or system administrator for guidance in setting the PS1/PS2 switch. Your equipment provider should also be asked about using or disabling the Teleset terminating resistors (TR).

SWITCH SETTINGS:

nPOWER SWITCH

The PS1/PS2 power switch is located on the bottom of the i2021.

nTR SWITCH

When the i2021 Teleset is connected to the NT1 it acts as Terminal Equipment (TE). Terminal Equipment is any (ISDN) device that terminates directly on the ISDN line without a Terminal Adaptor.

If your Teleset is the last, or only, piece of TE on the ISDN line, set the TR to ON, otherwise it is set to OFF. This is determined by the local equipment provider’s policy. It is suggested that you check with the ISDN provider or your system administrator. Most companies allow up to eight TE units in the loop.

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