Application Configurations E
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Multipoint Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overview
This appendix shows examples of typical
Point-to-Point Applications
Model 3550 and Model 3551 DSUs provide both
When a V.32 DBM is installed, the DSU provides full backup capability when operating at speeds of 14.4 kbps or below. Backup can be automatic, or it can be initiated manually from the DSU's control panel or a 6700 Series NMS.
External dial backup units (DBUs), like 3800 Series modems, can also be used for backup when the External Backup (ExtBU) configuration option is enabled (refer to Chapter 5).
Figure E-1 shows a point-to-point configuration using both a carrier-mounted Model 3551 DSU and a standalone Model 3550 DSU configured as controls. These units have the PTPC configuration. The standalone DSU shows both a DBM and a TDM/Flex installed; the carrier-mounted DSUs are equipped with DBMs.
On the tributary side of the configurations a
Model 3550 DSU is paired with a 3800 Series modem for backup. Other tributaries, each equipped with a DBM and TDM/Flex, are shown; one is paired with a carrier- mounted DSU, and the other is paired with another standalone DSU.
Refer to your 6700 Series NMS documentation before connecting the NMS to the circuit.
December 1996 |
