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3.2.16 SBS, OfficeStart (not for U.S.)

Introduction

The SBS (single board system, S30817-Q905-Cxxx) is the underequipped version of the OfficeOne central board for OfficeStart. The board provides the following features and outputs:

Functions

Signaling unit (SIU)
Real-time clock with vanadium lithium battery (rechargeable)
PCM highway switching and conferencing on conferencing circuit

Ports

2 digital UP0/E subscriber line interfaces
4 analog a/b subscriber line interfaces
1 V.24 port
1 fixed S0 interface for trunk access
1 fixed S0 interface for subscriber lines

SBS interfaces

Figure 3-12 SBS Interfaces in OfficeStart (S30817-Q905-Cxxx)

SBS Contact Assignments

Table 3-12 OfficeStart Contact Assignments

Pin 
Conn. X1 (ab) 
Conn. X2 (UP0/E
 
Conn. X5 (V.24) 
a1 - Port 1 
b1 - Port 1 
 
GND 
b1 - Port 1 
a1 - Port 1 
 
TxD 
a2 - Port 2 
b2 - Port 2 
 
CTS 
b2 - Port 2 
a2 - Port 2 
 
RxD 
a3 - Port 3 
 
 
RTS 
b3 - Port 3 
 
 
VCC 
a4 - Port 4 
 
 
 
b4 - Port 4 
 
 
 
Pin 
Function 
Conn X3 (S0
 
11 
1st S0 trunk 
SX1+ (S0 port 1) 
 
12 
1st S0 trunk 
SR2+ (S0 port 1) 
 
13 
1st S0 trunk 
SR1- (S0 port 1) 
 
14 
1st S0 trunk 
SX2- (S0 port 1) 
 
21 
2nd internal S0 bus 
SX1+ (S0 port 2) 
 
22 
2nd internal S0 bus 
SR2+ (S0 port 2) 
 
23 
2nd internal S0 bus 
SR1- (S0 port 2) 
 
24 
2nd internal S0 bus 
SX2- (S0 port 2) 
 

SBS Contact Assignments for the Music and Announcement Module

Table 3-13 OfficeStart Contact Assignments for the Music and Announcement Module

Pin 
Connector X10 
Connector X11 
Connector X12 
P5V 
GND 
RING4 (a/b port 4 b) 
GND 
GND 
TIP4 (a/b port 4 a) 
EXMD (data line) 
GND 
N.C. 
EXMDIR (frame cycle, 8 kHz) 
GND 
N.C. 
EXMCL (data cycle, 512 kHz) 
P5V 
N.C. 
EXMDET (detect signal) 
P5V 
N.C. 

SBS Numbering Plan

Table 3-14 OfficeStart Numbering Plan

OfficeStart  
Stn. no. 
Int. call no. 
DID no. 
Port numbering system 
Type 
 
SBS 
UP0/E 
11 
11 
11 
UP0/E
 
UP0/E
primary 
12 
12 
12 
UP0/E
 
a/b 
13 
19 
19 
a/b 
 
14 
20 
20 
a/b 
15 
21 
21 
a/b 
16 
22 
22 
a/b 

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