User's Manual

10271450001 Revision D Installing indoor hub equipment 6–29Hub installation
The OC3c–ATM SSI, shown in figure 6-18, provides an OC3c
physical interface and provides ATM cell queuing and
multiplexing for over–the–air transmission.
Figure 6-18 OC3c–ATM SSI
OC3c SSI
OK
STATUS
hb090
LEDs indicate
SSI status
ALARM
Tx Rx
Dual SC connector
OK
ALARM
The maximum cable length for an OC3c–ATM SSI is 1,000 feet
(305 meters).
The DS3–transparent SSI, shown in figure 6-19, provides a direct
point–to–point link between the HT and RT.
Figure 6-19 DS3–transparent SSI
Tx
ALARM
OK
Rx
TRNSP SSI3DS
T0006023
BNC Rx connector
BNC Tx connector
LEDs indicate status of each link
OK
STATUS
LEDs indicate
SSI status
ALARM
The maximum cable length for a DS3–transparent SSI is 450 feet
(137.2 meters).
Look at the hub network schematic or other configuration
document to determine:
How many SSIs to install
What type(s) of SSIs to install
Which SSI to install in each IDU chassis slot
Important:
Install the OC3c–ATM SSI in chassis slot 3 only.
Install the DS3–TDM SSI in slot 5 only.
OC3c–ATM
DS3–transparent
SSI physical
configuration