User's Manual

Application Note 16 – version 1.1

page 3

plication Note

3 Installation

3.1 Mounting the Chassis

1) Mount the TurboMAX chassis as you would any other interWAVE chassis, either in an equipment

rack, on a wall, or on a table, as described in the WAVEXpress BTS Installation and Commissioning

Guide.

3.2 Verifying and Configuring the E1 or T1 Card

2) When your TurboMAX is equipped with an E1 Trunk card, verify that the trunk impedance is set

correctly on the eight-position DIP switch on the edge of the E1 card. For 75 Ohm coaxial cable,

DIP switches 1, 2, 3, 5, 6, and 7 must be set to ON, and DIP switches 4 and 8 must be set to OFF, as

indicated on the DIP switch housing. For 120 Ohm twisted pair, all the DIP switches must be set to

ON.

If you have set the E1 Trunk card for 75 Ohm coaxial cable, you may also need to ground the E1

coaxial cable shields. Note that only one side of the coaxial cables should be grounded to avoid

ground loops. To ground the Port 0 Transmit shield, place a jumper across P9 pins 1 and 2. To

ground the Port 0 Receive shield, place a jumper across P8 pins 1 and 2. To ground the Port 1

Transmit shield, place a jumper across P10 pins 1 and 2. To ground the Port 1 Receive shield, place

a jumper across P11 pins 1 and 2.

3) When your TurboMAX is equipped with a T1 Trunk card, configure the trunk for the cable distance

to the DSX1 T1 demarcation point using the eight-position DIP switch on the edge of the T1 card.

For Port 0, use DIP switch pins 1 – 4, and for Port 1, use DIP switch pins 4 – 8.

For Port 0, when the TurboMAX is connected directly to another WAVEXpress chassis or if it is

connected to a T1 DSX1 demarcation point at 0-133ft (0-40m), set DIP switch 1 to OFF, and set

DIP switches 2, 3, and 4 to ON, as indicated on the DIP switch housing. When the TurboMAX is

connected to a T1 DSX1 demarcation point at 133-266ft (40-80m), set DIP switches 1 and 2 to OFF,

and set DIP switches 3 and 4 to ON. When the TurboMAX is connected to a T1 DSX1 demarcation

point at 266-399ft (80-120m), set DIP switches 1 and 3 to OFF, and set DIP switches 2 and 4 to ON.

When the TurboMAX is connected to a T1 DSX1 demarcation point at 399-533ft (120-160m), set

DIP switches 1, 2, and 3 to OFF, and set DIP switch 4 to ON. When the TurboMAX is connected to

a T1 DSX1 demarcation point at 533-655ft (160-200m), set DIP switches 1 and 4 to OFF, and set

DIP switches 2 and 3 to ON.

For Port 1, when the TurboMAX is connected directly to another WAVEXpress chassis or if it is

connected to a T1 DSX1 demarcation point at 0-133ft (0-40m), set DIP switch 5 to OFF, and set

DIP switches 6, 7, and 8 to ON, as indicated on the DIP switch housing. When the TurboMAX is

connected to a T1 DSX1 demarcation point at 133-266ft (40-80m), set DIP switches 5 and 6 to OFF,

and set DIP switches 7 and 8 to ON. When the TurboMAX is connected to a T1 DSX1 demarcation

point at 266-399ft (80-120m), set DIP switches 5 and 7 to OFF, and set DIP switches 6 and 8 to ON.

When the TurboMAX is connected to a T1 DSX1 demarcation point at 399-533ft (120-160m), set

DIP switches 5, 6, and 7 to OFF, and set DIP switch 8 to ON. When the TurboMAX is connected to

a T1 DSX1 demarcation point at 533-655ft (160-200m), set DIP switches 5 and 8 to OFF, and set

DIP switches 6 and 7 to ON.