James Robnett

EVLA M&C Hardware PDRMarch 13 2002

1

EVLA M&C Hardware PDR

Voice Communications

James Robnett

EVLA M&C Hardware PDRMarch 13 2002

2

Requirements

• Connectivity

• Functionality

• Impact

• Costs

James Robnett

EVLA M&C Hardware PDRMarch 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 ?

James Robnett

EVLA M&C Hardware PDRMarch 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

James Robnett

EVLA M&C Hardware PDRMarch 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

James Robnett

EVLA M&C Hardware PDRMarch 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