The Telinc TL1016 Equipment Nest packs 16 CSU/DSUs in only 4.375" (2.5U) of rack space, 256 in a standard 70" cabinet. It accommodates any combination of Telinc T-l, E-1 and DDS CSU/DSUs, each con- trolled with SNMP, a VT100 terminal or DIP switches. The nest mounts in 19" or 23" racks and is available with single or dual, load-sharing 115 VAC, 220 VAC and 48 VDC power supplies. The CSU/DSUs are also available in standalone form.

SNMP, VT100 and DIP Switch Control

Telinc CSU/DSUs can be controlled with a local or remote VT100 terminal or individually with switches on each CSU/DSU. SNMP control, with an Ethernet interface, is available as an option. The embedded SNMP agent is MIB II-compliant and supports SNMP gets, sets and traps. With SNMP, the TL1016 presents a single IP address for all sixteen CSUs in the nest.

Optional Redundant Power Supplies and Controllers

The equipment nest power supply and controller are packaged together on a single plug-in module. A second module can he added for maximum reliability. The dual supplies operate in a load-sharing mode with either capable of assuming the full load.

The redundancy can be implemented with two AC supplies, two DC supplies or one of each. The common controllers are used only for communication with the remote manager. Failure of one or both of them will not affect operation of the CSU/DSUs.

Midplane Construction

The TL1016 equipment nest employs a midplane design. There are eighteen slots in the front of the nest and eighteen more in the rear. Two of the front and rear slots are used for the power and controller modules. The other sixteen slots are for CSU/DSUs. The products are made up of two-board sets, a CSU/DSU board and an interface board. The CSU/DSU board plugs into the front of the nest and contains the T-l, E-1 or DDS CSU/DSU. The interface board plugs into the rear and contains the interface circuitry and connectors for T-l, E-l, DDS, RS232, RS422, RS530, V.35, etc.

The Telinc midplane approach provides flexibility for change. New interfaces can be added to existing products. New products can use existing interface connections. Products can be inserted and removed without disturbing interface cabling.