363-206-295
Technical Specifications
10-18 Issue 1 December 1997
NOTE:
When using universal optical buildout attenuators for OLIUs equipped with
Universal Optical Connectors (for example, 22G-U and 22D-U), the buildout
must have the same type fiber on both sides, that is, single-mode to single-
mode or multimode to multimode. The buildout must also match the mode
of the fiber. Therefore, when a single-mode jumper is used, the buildout
would be on the transmit side (OUT) of the OLIU and when a multimode
jumper is used, the buildout would be on the receive side (IN) of the OLIU.
When using in-line attenuators for non-U OLIUs, place the attenuator in the
bay frame PANDUIT. Make sure that the mode type of the attenuator
matches the mode of the fiber to ensure proper attenuation.
Table 10-10 details the maximum link budgets for each pairing of OC-3 rate OLIUs
when operating on single-mode (SM) fiber. These numbers give the maximum
attenuation acceptable for proper operation of each transmitter/receiver pair. The
link must have no more than this much attenuation either from fiber loss, splice
loss, connector loss, external attenuators or a combination of these or the link will
not operate properly. The maximum link budgets for SM fiber were calculated
using the following margins:
■ Optical Path Penalty (dB) 1.0
■ Connector Loss (dB) 1.5
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