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TN1654

The TN1654 DS1 converter circuit pack is a replacement for the TN574 DS1 converter circuit pack in R7r or later systems. The TN1654 converter complex installs in place of the conventional fiber and supports from 1 to 4 T1 or E1 facilities, providing a total of 92 T1 channels (or 120 E1 channels) in each direction between the PPN and the EPN. This capacity is enough for an EPN to easily support several hundred stations.

R7r or later architecture provides for EPNs that are remotely located from the PPN. EPNs within 5 miles (8 km) of the PPN may be coupled using multimode fiber optic cable or within 22 miles (35.4 km) using single-mode fiber optic cable. When the distance between the PPN and the EPN exceeds 5 miles (8 km) (multimode), or 22 miles (35.4 km), single-mode, or private right-of-way is not available, connect using a DS1 converter complex. A DS1 converter complex consists of a pair, 1 at each end, of DS1 converter circuit packs and the associated T1/E1 facilities.

A new set of Y-cables is required by the TN1654 to connect to a TN570B Expansion Interface circuit pack for system communication.


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