- •Question for the exam in subject Switching systems and information distribution. 2016-2017 a.Y. Оглавление
- •Principles of national telephone network construction in Ukraine. Numbering in national telephone network.
- •Figure 1.4 - National numbering format.
- •1.2 National Numbering Plane
- •Principles of zonal telephone network construction in Ukraine. Numbering in zonal telephone network.
- •Principles of urban telephone network construction (utn). Example of utn with five digit numbering construction. Example of analogue-digital utn construction.
- •Switching method classification. Channel, message and packet switching. Switching method comparison.
- •Switching method classification. Channel switching technology. Features, advantages and disadvantages.
- •Switching method classification. Message and packet switching technologies. Features, advantages and disadvantages.
- •Digital switching fields. Construction and operation principles of space switching unit (ssu) with parameters 2×4×6 built upon мх.
- •Digital switching fields. Construction and operation principles of space switching unit (ssu) with parameters 2×4×6 built upon dмх.
- •Digital switching fields. Construction and operation principles of time switching unit (tsu) with parameters 1×8×8. Control modes in tsu.
- •Il ol g c o u n t e r cm cell- cm cell- cm cell- cm cell- Controller
- •Dss «Kvant-e». Subscriber access subsystem. Analogue subscriber lines including.
- •Line access subsystem of a dss
- •Dss «Kvant-e». Analogue customer unit borscht function.
- •Dss «Kvant-e». Subscriber access subsystem. Slu-128 scheme. Short description of main elements.
- •Figure 2.2 – Narrowband access subscriber module of Kvant-e
- •Dss «Kvant-e». Subscriber access subsystem. Algorithm of outgoing call in slu-128.
- •2.2 Algorithm of connection set up
- •Step 1. Dial tone sending
- •Step 2. Pulse dialing
- •Step 5. The controller of sm-b operates sm-b equipment in order to establish connection
- •Step 7. Answer of subscriber b
- •Dss «Kvant-e». Subscriber access subsystem. Algorithm of incoming call in slu-128.
- •Dss «Kvant-e». Signalling subsystem. Innersystem signalling, issc packet structure.
- •Architecture of dss si-2000. Parameters and short characteristics of modules mlc and mca
- •Architecture of si-2000 dss
- •Multiservice subscriber access networks based on dslam (ban). Review of wired multiservice access technologies.
- •2) Broadband access node an-bb (ban, hBan, miniBan, microBan)
- •Example of tasks.
2) Broadband access node an-bb (ban, hBan, miniBan, microBan)
AN-BB provides all the necessary services (ranging from telephone calls to broadband Internet access, multimedia and video streams) over a single subscriber line.
AN-BB separates broadband and narrowband traffic. The broadband traffic goes to an ATM packet switch. AN-BB provides interfaces for ATM and Ethernet transport networks. It can interact with different local computer networks.
AN-BB supports:
- Asymmetric digital subscriber lines (ADSL) of high bit rate. The lines enable such services like Video on Demand (VoD), broadband internet access, files exchange, e-learning and others.
Symmetric digital subscriber lines (SDSL) of high bit rate (2Mbit/s). Symmetric digital subscriber lines are widely used by busyness subscribers because they enable such services like videoconferences, e-mail service under high load of channel conditions.
Symmetric digital subscriber lines with V5.2 interface (up to 16 El trunks);
Trunks with V5.2 interfaces towards MCA for telephone traffic;
Optical lines towards SDH transport networks.
AN-BB is based on BAN (15slots x 16ADSL = 240) equipment that supports 240 ADSL lines. Hybrid BAN (hBAN) supports 96 ADSL lines and 288 analogue subscriber lines (or 144 ISDN lines). miniBAN (can be installed into MLC) contains one card for 24 ADSL/SDSL lines. microBAN supports from 8 to 24 ADSL subscribers.
Example of tasks.
Determine the IM and CM parameters in TSSU Nxnxr.
Determine quantity of E1 trunks include in SCU and its type, in case if DSS «Kvant-E» includes NDSS = ХХХХХ subscribers, quantity of outgoing trunks NT = ХХ trunks.
Write switching formula in TSSU of SLU-128, in case of sending in subscriber line with number 0ХХ one of the tone signals.
Show elements of ACU which are necessary for providing one of BORSCHT functions.
Prepare ISSC packet for subscriber B number ХХ-ХХ-ХХ transmitting, in case of reserving for conversation TC with number ХХ.