logging in or signing up telecom basic radha235 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 242 Category: Entertainment License: All Rights Reserved Like it (0) Dislike it (0) Added: February 01, 2011 This Presentation is Public Favorites: 0 Presentation Description it tells about Telecom overview to basic laearner about telecom Comments Posting comment... Premium member Presentation Transcript Telecom Overview : Telecom Overview By RGM TTC BSNL Chennai Telecom Network : Telecom Network Access Junction Long Distance Access Network : Access Network Subscriber to Switch Medium – Copper, Fiber, Wireless Junction Network : Junction Network Switch to Switch Medium – Copper, Fiber, Wireless Long Distance Network : Long Distance Network One Metro to Another Medium – (Copper), Fiber, Wireless Telecom Traffic : Telecom Traffic Measured in Erlangs 3 Parameters1) Number of Junctions2) GoS or Blocking Probability3) Traffic Handling Capacity of the switch Given any 2 parameters, the 3rd can be found from a table. Telecom Traffic - Example : Telecom Traffic - Example Number of Trunks = 7 GoS = 2% Traffic Capacity = 2.94 E Telecom Traffic – Example… : Telecom Traffic – Example… Rural Sub Average Call Holding Time = 1.5 min Traffic generated per Average Rural Sub = 1.5/60 E Number of Rural Subs supported = 2.94/(1.5/60) = (2.94 x 60)/1.5 = 117(app) Telecom Traffic - Question : Telecom Traffic - Question Previous Example Data Traffic generated per Average Urban Sub = 40 mE Number of Urban Subs supported = ? Signal Power : Signal Power Measured in dBm dBm – decibel with ref to 1 milli Watt P mW = 10 log10 P dBm dBm - Example : dBm - Example P = 1 mW 1 mW = 10 log10 1 dBm 1 mW = 10 x 0 dBm = 0 dBm dBm – Example… : dBm – Example… 2 mW = 3 dBm 4 mW = 6 dBm When the Signal Power in mW doubles, Signal power in dBm is augmented by 3. Gain/Loss of a Network : Gain/Loss of a Network Measured in dB Gain = 10 log10 (Pout / Pin) dB Loss = 10 log10 (Pin / Pout) dBwherePout – Network Output Signal powerPin – Network Input Signal power Gain/Loss of a Network… : Gain/Loss of a Network… Gain(in dB) = Output(in dBm) – Input(in dBm) Loss(in dB) = Input(in dBm) – Output(in dBm) Gain/Loss of a Network - Ex : Gain/Loss of a Network - Ex Pout = 1 Watt Pin = 1 milli Watt Gain(in dB) = 30 dBm – 0 dBm = 30 dB You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
telecom basic radha235 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 242 Category: Entertainment License: All Rights Reserved Like it (0) Dislike it (0) Added: February 01, 2011 This Presentation is Public Favorites: 0 Presentation Description it tells about Telecom overview to basic laearner about telecom Comments Posting comment... Premium member Presentation Transcript Telecom Overview : Telecom Overview By RGM TTC BSNL Chennai Telecom Network : Telecom Network Access Junction Long Distance Access Network : Access Network Subscriber to Switch Medium – Copper, Fiber, Wireless Junction Network : Junction Network Switch to Switch Medium – Copper, Fiber, Wireless Long Distance Network : Long Distance Network One Metro to Another Medium – (Copper), Fiber, Wireless Telecom Traffic : Telecom Traffic Measured in Erlangs 3 Parameters1) Number of Junctions2) GoS or Blocking Probability3) Traffic Handling Capacity of the switch Given any 2 parameters, the 3rd can be found from a table. Telecom Traffic - Example : Telecom Traffic - Example Number of Trunks = 7 GoS = 2% Traffic Capacity = 2.94 E Telecom Traffic – Example… : Telecom Traffic – Example… Rural Sub Average Call Holding Time = 1.5 min Traffic generated per Average Rural Sub = 1.5/60 E Number of Rural Subs supported = 2.94/(1.5/60) = (2.94 x 60)/1.5 = 117(app) Telecom Traffic - Question : Telecom Traffic - Question Previous Example Data Traffic generated per Average Urban Sub = 40 mE Number of Urban Subs supported = ? Signal Power : Signal Power Measured in dBm dBm – decibel with ref to 1 milli Watt P mW = 10 log10 P dBm dBm - Example : dBm - Example P = 1 mW 1 mW = 10 log10 1 dBm 1 mW = 10 x 0 dBm = 0 dBm dBm – Example… : dBm – Example… 2 mW = 3 dBm 4 mW = 6 dBm When the Signal Power in mW doubles, Signal power in dBm is augmented by 3. Gain/Loss of a Network : Gain/Loss of a Network Measured in dB Gain = 10 log10 (Pout / Pin) dB Loss = 10 log10 (Pin / Pout) dBwherePout – Network Output Signal powerPin – Network Input Signal power Gain/Loss of a Network… : Gain/Loss of a Network… Gain(in dB) = Output(in dBm) – Input(in dBm) Loss(in dB) = Input(in dBm) – Output(in dBm) Gain/Loss of a Network - Ex : Gain/Loss of a Network - Ex Pout = 1 Watt Pin = 1 milli Watt Gain(in dB) = 30 dBm – 0 dBm = 30 dB