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3.3.9 STLS2 (Not for U.S.) and STLS4

Introduction

The STLS4 board for OfficeCom and OfficePoint has four S0 ports that can be operated either as external trunk interfaces in TE (terminal equipment) mode or as interfaces to internal S0 busses in NT (network terminator) mode (with cross-connected RX TX lines).

The STLS2 is an underequipped variant with two S0 ports. It is not currently supported in the U.S.

Interfaces

 
The STLS2 or STLS4 does not supply terminals with power; power must be supplied locally using an optiset E local power supply or a bus power supply unit.  

Figure 3-39 STLS2 (Not for U.S.) and STLS4 Interfaces (S30817-Q924-Bxxx/Axxx)

Interface Assignments (for U.S. Only)

Table 3-43 STLS4 Module Interface Assignments (for U.S. Only)

Pin 
Port 
Assignment 
 
Pin 
Port 
Assignment 
Signal transmit 
 
Signal transmit 
Signal receive 
Signal receive 
Signal receive 
Signal receive 
Signal transmit 
Signal transmit 
Signal transmit 
Signal transmit 
Signal receive 
Signal receive 
Signal receive 
Signal receive 
Signal transmit 
Signal transmit 

Note: The STLS4 Module serves the trunk side in Europe, so the transmit and receive signals must be reversed before the first device on the S0 bus. In contrast, the optiset E ISDN adapter uses a straight-through connection because it is always a station-only device. See Figure 3-41 on page 3-112 for details.

The ISDN terminals must have their own local power supply. Refer to Section 9.6.1 for information on setting up an S0 bus.

The system assigns the MSN only after the S0 port is configured on the Euro-bus (not for U.S.) and can be read out via the administration
(Assistant T: code 20 4 3 S0 bus MSN).

Connecting ISDN Terminals to OfficeCom and OfficePoint

S0 Bus With RJ45 (MW8) Jack

Connecting S01 to S04:

Connect the provided, silver-satin connector cord to each port on the STLS4 Module. Connect the other end to a surface-mounted RJ45X jack, reversing the transmit and receive wires as shown in Figure 3-41 on page 3-112.
Contact is always established using the center pins of RJ jacks. Figure 3-40 shows the pin assignments for jacks of different sizes.
The ISDN terminals must have their own local power supply. Refer to Section 9.6.1 for information on setting up an S0 bus.
Plug the ISDN terminal (connecting cord) into the RJ45 jack. Connecting an ISDN S0 telephone requires a local power supply (e.g. manufactured by Sedlbauer); see Figure 9-9 on page 9-25.

Pin Assignment of RJXX Jacks

Figure 3-40 RJXX Jack Pin Assignment

S0 Bus Wiring From STLS4 Port or optiset E ISDN adapter

Figure 3-41 S0 Bus Wiring From STLS4 Port or optiset E ISDN adapter

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