CANOGA PERKINS 2461 E1 Modem - Manual (Page 16)

EdgeAccess Universal Chassis System
1.3 OLIM Interface Options
There are several options for selecting optical transceivers. These options accommodate the
following needs:
• Differences in the fiber optic cable core size used in the network
• Differences in operating wavelengths
• Differences in transceiver power budget and connector styles
The options available are as follows:
Wavelength Loss Budget Connector Fiber Type
850nm LED 16dBm ST Multimode
1310nm Laser 26dBm ST, FC/PC, SC Single mode
1310nm Laser 17dBm ST, FC/PC, SC Single mode
1550nm Laser 26dBm ST, FC/PC, SC Single mode
1.4 Loss Budget Considerations
The maximum possible distance with either standard or long distance versions is dependent on
the overall power loss of the fiber optic link. This is called the link loss. The launch power of the
transmitter along with the receiver sensitivity, determines the loss budget. To insure normal
operation over a long term, the link loss should be at least 3dB less than the loss budget for the
modem.
Additionally, see the distance guide chart in Figure 7.
Figure 7. Distance guide for the 2461 modem
2461 Modem User Manual 1-6