Avaya Communication Server 1000 Series Reference
Electronic switched network reference-signaling and transmission
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Summary of Contents for Avaya Communication Server 1000 Series
- Page 1 Electronic Switched Network Reference — Signaling and Transmission Avaya Communication Server 1000 NN43001-280, 05.03 August 2011...
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Page 3: Table Of Contents
Navigation..............................9 Getting technical documentation....................... 9 Getting product training..........................9 Getting help from a distributor or reseller....................9 Getting technical support from the Avaya Web site.................. 10 Chapter 3: Introduction...................... Subject..............................11 Note on legacy products and releases..................... 11 Applicable systems........................... 11 Intended audience............................ - Page 4 Case 3: Calls From stations at a senderized main circuit switch............. 22 Case 4: Calls From a cut-through tributary circuit switch..............23 Case 5: Calls From a senderized tributary circuit switch..............23 Case 6: Calls From main senderized and tributary senderized circuit switches......24 Call completions............................
- Page 5 Node-to-main, satellite, or tributary connections................44 Voiceband data performance........................45 Chapter 9: Maintaining transmission performance............Contents..............................47 Installation..............................47 Scheduled maintenance........................... 47 Corrective maintenance..........................48 Transmission testing of TIE Trunks......................48 Testing loss............................48 Testing noise............................ 49 Index............................. Electronic Switched Network Reference — Signaling and Transmission August 2011...
- Page 6 Electronic Switched Network Reference — Signaling and Transmission August 2011...
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Page 7: Chapter 1: New In This Release
Chapter 1: New in this release The following sections detail what’s new in Avaya Electronic Switched Network Reference - Signaling and Transmission, NN43001-280 for Avaya Communication Server 1000 (Avaya CS 1000) Release 7.5.: • Features on page 7 • Other changes... - Page 8 This new document consolidates information previously contained in the following 2 legacy documents, now retired: • Electronic Switched Network Signaling Guidelines (309-3001-180) • Electronic Switched Network Transmission Guidelines (309-3001-181) Electronic Switched Network Reference — Signaling and Transmission August 2011 Comments? infodev@avaya.com...
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Page 9: Chapter 2: Customer Service
Chapter 2: Customer service Visit the Avaya Web site to access the complete range of services and support that Avaya provides. Go www.avaya.com or go to one of the pages listed in the following sections. Navigation • Getting technical documentation on page 9 •... -
Page 10: Getting Technical Support From The Avaya Web Site
Customer service Getting technical support from the Avaya Web site The easiest and most effective way to get technical support for Avaya products is from the Avaya Technical Support Web site at www.avaya.com/support. Electronic Switched Network Reference — Signaling and Transmission August 2011 Comments? infodev@avaya.com... -
Page 11: Chapter 3: Introduction
Chapter 3: Introduction This document is a global document. Contact your system supplier or your Avaya representative to verify that the hardware and software described are supported in your area. Subject Note on legacy products and releases This document contains information about systems, components, and features that are compatible with Communication Server 1000 software. -
Page 12: Conventions
• Avaya Software Input/Output Administration (NN43001-611) • Avaya Software Input/Output Reference - Maintenance (NN43001-711) Online To access Avaya documentation online, click the Technical Documentation link under Support & Training on the Avaya home page: Electronic Switched Network Reference — Signaling and Transmission August 2011 Comments? infodev@avaya.com... - Page 13 Related information http://www.avaya.com Electronic Switched Network Reference — Signaling and Transmission August 2011...
- Page 14 Introduction Electronic Switched Network Reference — Signaling and Transmission August 2011 Comments? infodev@avaya.com...
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Page 15: Chapter 4: Overview
In an Avaya Communication Server 1000 (Avaya CS 1000) and Meridian 1 network, the Electronic Switched Network (ESN) node switches collect all digits of the called number and pass the full-called number between switches. -
Page 16: Switch Designations
The outgoing routes can be assigned different access codes, leaving route selection to the end user. Outgoing routes can also be selected by an automatic route selection capability. Electronic Switched Network Reference — Signaling and Transmission August 2011 Comments? infodev@avaya.com... -
Page 17: Tributary Switch
Supervision Tributary switch A tributary switch is a circuit switch that has a trunk route to a main circuit switch, but not to a node. A tributary circuit switch can have CO, FX, and WATS trunks, as well as TIE Trunks to other switches. -
Page 18: Modes Of Operation
NARS digit manipulation. The end user does not receive call progress tones until all digits are transmitted. Electronic Switched Network Reference — Signaling and Transmission August 2011 Comments? infodev@avaya.com... -
Page 19: Start Dial Control
Start dial control No tones are provided during dialing other than a locally-generated dial tone following the trunk access code. Senderized mode limits flexibility. The main circuit switch must be programmed to determine how many digits to collect before forwarding those digits to the node. Usually, no more than 12 digits can be collected and forwarded. -
Page 20: Delay Dial
Normally, only one start dial control is used. However, on some switches, a dial tone may be combined with any of the other three. System switches in an ESN network can work with any start dial signal. Electronic Switched Network Reference — Signaling and Transmission August 2011 Comments? infodev@avaya.com... -
Page 21: Chapter 5: Call Setup Sequences
Chapter 5: Call setup sequences Contents This section contains information on the following topics: Introduction on page 21 Calls to the ESN node on page 21 Call completions on page 24 Calls to other private networks on page 26 Calls from other private networks on page 26 Requirements for dialing pauses on page 27... -
Page 22: Case 2: Calls From A Cut-Through Non- Senderized Tributary Circuit Switch
Case 3: Calls From stations at a senderized main circuit switch This case describes calls from stations at a senderized main circuit switch to an ESN node: Electronic Switched Network Reference — Signaling and Transmission August 2011 Comments? infodev@avaya.com... -
Page 23: Case 4: Calls From A Cut-Through Tributary Circuit Switch
Calls to the ESN node 1. The caller goes off-hook, receives a dial tone, dials the ESN access code, receives a second dial tone from the main circuit switch, and then dials the desired number. 2. The senderized main circuit switch does not seize a TIE Trunk to the node after receiving the access code. -
Page 24: Case 6: Calls From Main Senderized And Tributary Senderized Circuit Switches
4. To reach a PSTN telephone by the tributary circuit switch, the node outpulses an access code for the main to tributary TIE Trunk, followed by the access code to the CO trunk, followed by the PSTN number. Electronic Switched Network Reference — Signaling and Transmission August 2011 Comments? infodev@avaya.com... -
Page 25: Case 1
Call completions Case 1 This case applies to a call from an ESN node to a telephone at either a cut-through or a senderized main circuit switch: 1. The node seizes a TIE Trunk to the main circuit switch and then pauses, waiting for the main circuit switch to receive digits. -
Page 26: Calls To Other Private Networks
CCSA switch. An unambiguous numbering plan encompassing both the ESN network and CSSA must be arranged. The ESN node routes calls in the CCSA numbering plan to the CCSA switch. Electronic Switched Network Reference — Signaling and Transmission August 2011 Comments? infodev@avaya.com... -
Page 27: Requirements For Dialing Pauses
Requirements for dialing pauses Requirements for dialing pauses When outpulsing to the main circuit switch and to a TTTN, ESN nodes are occasionally required to pause at various points in the digit string to allow for trunk access and register attachment. Failure to pause causes missed digits and calls to connect to wrong numbers or to be lost altogether. - Page 28 Call setup sequences Electronic Switched Network Reference — Signaling and Transmission August 2011 Comments? infodev@avaya.com...
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Page 29: Chapter 6: Transmission Considerations
Chapter 6: Transmission considerations Contents This section contains information on the following topics: Echo on page 29 Loss on page 30 Tandem switching on page 30 Trunk routing rules on page 31 Gain on page 31 Echo All voice connections between telephones require two directions of transmission for conversation to take place. -
Page 30: Loss
Thus, a tandem connection made at the circuit switch can introduce the distortion of two loop plant Electronic Switched Network Reference — Signaling and Transmission August 2011 Comments? infodev@avaya.com... -
Page 31: Trunk Routing Rules
Trunk routing rules connections and two carrier facility connections, both avoided in the PSTN tandem connections. Trunk routing rules Trunk routing rules define the allowed connections between node, main, tributary, and satellite circuit switches. These routing rules are summarized in Table 1: Trunk routing rules page 31. -
Page 32: Gain Devices
Compensation for impedances is required for the direction sensing circuitry to function properly. Table 2: Comparison of fixed gain and voice-switched gain on page 33 compares fixed gain and voice-switched gain. Electronic Switched Network Reference — Signaling and Transmission August 2011 Comments? infodev@avaya.com... -
Page 33: Gain With Compression
Gain Gain with compression On some connections, signal levels may already be high, and gain may increase the levels above FCC specified limits. Some manufacturers provide compression options to guard against exceeding FCC limits. Speech compression ensures that signal levels do not exceed a specified maximum, generally –9 dBm. -
Page 34: Application To Trunks
DISA, and gain is not desirable for the traffic to telephones. Instead, add a new ground-start CO trunk group and move DISA to that group. Gain units can then be provided on that group. Electronic Switched Network Reference — Signaling and Transmission August 2011 Comments? infodev@avaya.com... -
Page 35: Chapter 7: Transmission Planning
Chapter 7: Transmission planning Contents This section contains information on the following topics: Planning on page 35 Placement of nodes on page 36 TIE trunk routes on page 36 Network call routing on page 36 Transmission controls on page 37 Off-network call routing on page 39 Network facilities... -
Page 36: Placement Of Nodes
Table 3: Route count table (maximum number of node-to-node routes) on page 37 gives the maximum number of Electronic Switched Network Reference — Signaling and Transmission August 2011 Comments? infodev@avaya.com... -
Page 37: Transmission Controls
Transmission controls node-to-node routes possible in networks of various sizes. The table establishes the upper limits on the number of routes to ensure that no potential route is overlooked. Table 3: Route count table (maximum number of node-to-node routes) Nodes Direct routes 2 trunks in 3 trunks in... -
Page 38: Two-Trunk Tandem Routes
For smaller networks, sort and test all three-trunk tandem routes for proper controls. For larger networks, the number of three-trunk tandem routes actually permitted is small in comparison Electronic Switched Network Reference — Signaling and Transmission August 2011 Comments? infodev@avaya.com... -
Page 39: Off-Network Call Routing
Off-network call routing to the number of possible routes. Therefore, the more efficient approach is to sort out the permitted routes and to consider only them. For three-trunk tandem routes, ES combinations must be considered, as well as total loss. Whenever a VNL TIE Trunk is connected with ES between two trunks, equip the VNL TIE Trunk with ES to disable intermediate echo suppressors. -
Page 40: Network Facilities
- TL 32M/E (Type II signaling) Conditioning is the tolerance on frequency response and delay distortion. Several degrees of conditioning beyond basic line quality are available, including: C1, C2, C3, C4, and D1. Electronic Switched Network Reference — Signaling and Transmission August 2011 Comments? infodev@avaya.com... -
Page 41: Pstn Facilities
Network facilities Generally, the basic line quality is adequate for voice applications. Conditioning is usually required for voiceband data applications. Table 8: Private network facility requirements From Facility required IPE cards Node Node TL 31M/E interface (4- NT8D15 wire E&M Type 1) Node Main TL 31M/E interface (4-... - Page 42 Calling area within USA, Canada, Interstate WATS outgoing PBX trunk, band 2 and bordering states, and beyond higher Calling to major cities in United Non-Bell services such as Sprint or MCI States Electronic Switched Network Reference — Signaling and Transmission August 2011 Comments? infodev@avaya.com...
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Page 43: Chapter 8: Transmission Performance
Chapter 8: Transmission performance Contents This section contains information on the following topics: Voice quality performance on page 43 Voiceband data performance on page 45 Voice quality performance The quality of voice connections over tandem trunks is a function of the composite characteristics of the trunks. -
Page 44: Node-To-Main, Satellite, Or Tributary Connections
2. Off-network local connections can terminate at nodes and main PBXs. For nodes, the loss is the same as above. For mains, the loss is limited to the following: a. 6.6 dB for calls originating at node stations Electronic Switched Network Reference — Signaling and Transmission August 2011 Comments? infodev@avaya.com... -
Page 45: Voiceband Data Performance
Voiceband data performance b. 9.1 dB for calls originating at main stations Voiceband data performance Voiceband data modems can transmit data between private network switches. General guidelines on the expected performance of various modem types for different ESN connections are provided in Table 10: Performance of modems with automatic adaptive equalizers page 45 and Table 11: Performance of modems with fixed equalizers... - Page 46 2400 b/s (75%) 2400 b/s (80%) 2400 b/s (90%) 2400 b/s (50%) 2400 b/s (60%) 2400 b/s (75%) Not recommended 2400 b/s (50%) 2400 b/s (50%) Electronic Switched Network Reference — Signaling and Transmission August 2011 Comments? infodev@avaya.com...
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Page 47: Chapter 9: Maintaining Transmission Performance
Chapter 9: Maintaining transmission performance Contents This section contains information on the following topics: Installation on page 47 Scheduled maintenance on page 47 Corrective maintenance on page 48 Transmission testing of TIE Trunks on page 48 Installation Maintaining high transmission performance in private networks requires constant attention by network administrators. -
Page 48: Corrective Maintenance
Table 12: Transmission level requirements Trunk design loss (dB) Minimum (dBm) Maximum (dBm) –17.5 –11.5 –18 –12 –18.5 –12.5 –19 –13 –19.5 –13.5 –20 –14 –20.5 –14.5 –21 –15 Electronic Switched Network Reference — Signaling and Transmission August 2011 Comments? infodev@avaya.com... -
Page 49: Testing Noise
Transmission testing of TIE Trunks If the requirements in Table 12: Transmission level requirements on page 48 are not met, isolate the fault to the trunk facility or equipment. Use the following test to aid in this isolation. Perform the test at each end of the facility: 1. - Page 50 If the requirement is not met at either or both facility ends, perform corrective maintenance on the appropriate switch and repeat the test. If the requirement is met at both facility ends, the facility supplier should perform corrective maintenance. Electronic Switched Network Reference — Signaling and Transmission August 2011 Comments? infodev@avaya.com...
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Page 51: Index
Index equalizers ..............ES (echo suppressor) ........planning ............... access codes, pauses with ......... three-trunk tandem routes ........answer supervision signal .......... two-trunk tandem routes ........automatic adaptive equalizers ........voice quality performance ........ESN (Electronic Switched Network) node ..call completions ........... - Page 52 calls to ..............public network facilities ......... ordering ..............main switches ............. tandem switching ..........main switches routing rules ........maintenance ............... manual trunks ............. modems ..............modes of operation ............. QPC237 circuit pack ........... QPC71 circuit packs ........... NARS (Network Alternate Route Selection) ....pause requirements ..........
- Page 53 transmission controls ..........transmission facilities ..........transmission testing ............ tributary circuit switch ..........VNL (via net loss) ..........routing rules ............three-trunk tandem routes ........tributary switches ............two-trunk tandem routes ........trunks ..........voice quality performance ........access codes, pauses with ........with telco facilities ..........