1. James Robnett EVLA M&C Hardware PDR March 13 2002 1 EVLA M&C Hardware PDR Voice Communications

2. James Robnett EVLA M&C Hardware PDR March 13 2002 2 Requirements Connectivity Functionality Impact Costs

3. James Robnett EVLA M&C Hardware PDR March 13 2002 3 Connectivity Vertex Room Pedestal Room Between antennas To VLA control building To AOC ? –Existing AOC phones –Digital phones in AOC To other ?

4. James Robnett EVLA M&C Hardware PDR March 13 2002 4 Functionality Fiber connected –Copper connected via media converter Two phones on same ringer –1 Digital phone + 1 slave analog phone Intercom between pedestal and vertex rooms Loud speaker Off hook detect

5. James Robnett EVLA M&C Hardware PDR March 13 2002 5 Impact 56Kbit bandwidth demand Only competes with M&C network on 1 Gbit link to antenna Demand can be mitigated at router via priority rules

6. James Robnett EVLA M&C Hardware PDR March 13 2002 6 Costs $750 - $1000 / antenna ~ $3000 for central system ~ $500 / additional phone at VLA/AOC Connection to NMT PBX $10K –May not be necessary depending on connectivity constraints Cost Drivers –Connectivity to current phone system –Integration date