Polycom SoundStructure C16 Design Manual page 184

Design Guide for the Polycom SoundStructure C16, C12, C8, and SR12
7 - 4
If two telephony cards are required, install the second telephony card in the
second SoundStructure device as shown in the following figure.
Telephony cards should be inserted into devices starting with the master device
and working down the OBAM link (increasing bus IDs) if more than one telephony
card is required.
Rear Panel OBAM LED Status
Once the devices are linked together, apply power to the SoundStructure
devices. Once the SoundStructure devices have finished booting, the OBAM
status LED's, shown in the following figure, will indicate the status of the
OBAM link.
OBAM In
Status LED
PHONE LINE
LAN C-LINK2 IN OBAM OUT
PHONE LINE
LAN C-LINK2 OBAM
IN OUT
LAN C-LINK2 OBAM
IN OUT
OBAM IR
IN OUT
OBAM Out
Status LED
PIN 2: TXD
PIN 3: RXD
PIN 5: GROUND
PIN 7: CTS
PIN 8: RTS
RS-232
IR 12V
PIN 2: TXD
PIN 3: RXD
PIN 5: GROUND
PIN 7: CTS
PIN 8: RTS
RS-232
IR
12V
PIN 2: TXD
PIN 3: RXD
PIN 5: GROUND
PIN 7: CTS
PIN 8: RTS
RS-232
IR
12V
12V