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Lucent Technologies DEFINITY Enterprise Communication Server Release 8.2 Administrators Guide
Lucent Technologies DEFINITY Enterprise Communication Server Release 8.2 Administrators Guide
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DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1387 IP trunk service 20 This is where your AAR or ARS route pattern comes into play. Typically, a route pattern for an IP trunk group uses the IP trunk group as its primary route and assigns one or more conventional trunk groups as alternate routes. Whenever the IP trunk group is blocked, DEFINITY ECS automatically routes its traffic over one of the alternate trunk groups you’ve administered. When transmission quality improves, DEFINITY ECS automatically sends your calls over the IP network again. PSTN Fallback PSTN Fallback uses the Public Switched Telephone Network (PSTN) to reroute calls. It monitors service quality over each IP trunk group, allowing you the benefit of Internet or intranet call savings whenever possible while ensuring that high quality voice transmission is always available. By default, PSTN Fallback is disabled and calls route over the IP network regardless of the voice quality. If transmission quality degrades, calls over the IP network timeout during call setup and users hear a reorder tone (a fast busy tone) indicating that they should hang up and try the call again later. NOTE: Continue with the rest of this section only if you plan to use PSTN Fallback. When PSTN Fallback is enabled, the DEFINITY IP Trunk application periodically checks the quality of service (QOS) on the IP network, to the remote site you want to call. The DEFINITY IP Trunk application checks the QOS by sending packets to the remote site and keeping a running average of the results of several samplings of the packets sent. When the averages exceed specified limits, the DEFINITY IP Trunk application instructs the switch to route calls to the remote IP trunk site through the PSTN. In order for PSTN Fallback to work properly, trunk groups must be administered consistent with Line Pools and the associated quality of service limits. Quality of service to one remote site (IP address) may be poor while quality of service to another remote site is good. If the quality of service to one remote site is poor, you want to use the PSTN for calls to that site in order to ensure good voice quality. At the same time, if the quality of service to another remote site is good, you want to continue sending calls to that site over the IP network in order to save costs. With the DEFINITY IP Trunk application, you use Line Pools to distinguish between calls going to different remote sites. A Line Pool is a logical grouping of trunk group members that are associated with the IP address of a particular remote site. For example, you can create Line Pool 1, associate a certain trunk group with Line Pool 1, and associate Line Pool 1 (and its trunk group members) with a site in New York City whose IP address is 192.68.25.1. You can create additional Line Pools for additional remote sites.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1388 IP trunk service 20 PSTN Example For example, say you create trunk group 10 and assign its members to the first 12 potts on the IP trunk circuit pack. Then you create a route pattern (for example, 5) with trunk group 10 for the first route preference and the trunk group for PSTN access for the second route preference. On the ARS analysis form, telephone numbers going to remote site A use route pattern 5. If the quality of service to remote site A becomes unacceptable, the DEFINITY IP Trunk application uses inservice/active status to block the trunk group members (trunk group 10) in Line Pool 1. A call routed to route pattern 5 follows the second route preference, which is the switch’s PSTN access trunk group. The call routes over the regular telephone network. When the DEFINITY IP Trunk application determines that the quality of service to remote site A is acceptable again, it unblocks (makes idle) all of the members in the Line Pool 1. The switch routes new calls to trunk group 10, and sends the calls over the IP trunks. Additional trunk groups, route patterns and set of ARS analysis entries are created for additional ports on the IP circuit pack for another Line Pool associated with additional remote sites. To summarize, there are a number of possible situations concerning PSTN Fallback. The following are some of the more common ones: PSTN Fallback is not used 1. Create one trunk group for all of your licensed channels. 2. Create one route pattern that contains only the above trunk group. 3. For each remote site, create a set (depending on the level off-premise dialing allowed) of ARS analysis entries that all point at the IP trunk route pattern. PSTN Fallback is used with one remote site 1. Create one trunk group for all of your licensed channels. 2. Create one route pattern that contains the above trunk group as the primary route and a PSTN trunk group as the secondary route. 3. Create a set (depending on the level off-premise dialing allowed) of ARS analysis entries for the remote site that all point at the IP trunk route pattern.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1389 IP trunk service 20 Network issues nLucent recommends that you avoid more than 3 consecutive analog voice to data pack conversions on voice calls. Repeated compression and decompression of a voice call may seriously degrade sound quality. nIP trunks can be used in Distributed Communications System (DCS) networks, but you’ll need a separate board, such as a C-LAN circuit pack, to provide a signaling channel. Connect the C-LAN board to the same LAN as the IP trunk circuit pack. If the IP network is significantly slower than the network carrying DCS messaging, the DCS messages for a call could arrive at the destination before the call arrives. See DEFINITY ECS Administration for Network Connectivity for more information on DCS networks. nIf IP calls are tandemed through an intermediate switch and the destination switch generates the call progress tones, the tones the caller hears may be distorted because they’ve been compressed and expanded several times. Alerts Alerts allow you to monitor the DEFINITY IP Trunk application service on one or more systems. Whenever an event occurs on a DEFINITY IP Trunk application that might affect service, a popup window appears on the receiving Windows NT™ system monitor. For information about setting up alerts refer to DEFINITY ECS Administration for Network Connectivity. Call Detail Recording Logs The DEFINITY IP Trunk application can create Call Detail Recording (CDR) logs on the IP trunk server so that you can retrieve the records from your LAN. However, CDR files on the IP trunk server are not backed up, and you have to manage both the IP trunk CDR file and the CDR logs on the switch. If you don’t need to access IP Trunk CDR data over the LAN, Lucent recommends that you not activate CDR logs on the IP trunk server. PSTN Fallback is used with multiple remote sites 1. Create a separate trunk group for the channels of each line pool. 2. Create a separate route pattern for each trunk group. Each route pattern should contain the IP trunk group as the primary route and a PSTN trunk group as the secondary route. 3. For each remote site, create a set (depending on the level off-premise dialing allowed) of ARS analysis entries that point at the route pattern for that site’s trunk group.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1390 IP trunk service 20 NOTE: Once you start the IP trunk CDR function in Configuration Manager, you can’t turn it off except by editing the c:\its\bin\its.ini. To turn IP trunk CDR logging off, change the entry “CdrSwitch=” to 0 in the its.ini file. The DEFINITY ECS application logs call detail records and error messages. The format and content of these records is different from the format and content of call detail records created by DEFINITY ECS. CDR data is logged into flat text files. In Windows NT, these files are stored in C:\Its\log\cdr, by default, and you can specify a different location. The Service Logs property page of Configuration Manager indicates the location of the logs. To view the file, in the Windows NT Explorer, find the log file directory and double-click the appropriate cdr_yyyymmdd_hhmmss.log file. CDR data log files are written with file names in the following format: cdr_ yyyymmdd_hhmmss.log. The file name has a time stamp in 24-hour time format that indicates the local date and time. Whenever a new log file is created, its name contains the current time stamp. A file may be empty if no calls have been made. A new log file is written every day that a call is placed. A new log file is also created every time the service is started. Each record in the CDR file is 232 bytes long and contains information about one call. The DEFINITY IP Trunk application collects data for 18 fields in each record, and each field is separated by a space. These fields are detailed in the following chart. Note the following: nA record ends with a new line (two bytes, a carriage return, and a line feed character). nThe data is right-justified and padded with blanks. nOther character positions in the record are blank for this release.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1391 IP trunk service 20 Quality of Service Logs The DEFINITY IP Trunk application allows you to log Quality of Service statistics. Quality of Service (QoS) data is logged into flat text files. In Windows NT, these files are stored in the C:\Its\log\qos directory, by default, and you can specify a different location. The Service Logs property page of Configuration Manager indicates the location of the logs. QoS data log files are written with file names in the following format: qos_yyyymmdd_ hhmmss. log. The file name has a time stamp in 24-hour time format, that indicates the local date and time. Whenever a new log file is created, its name contains the current time stamp. A record is written to the QoS log whenever a line pool is blocked or unblocked by the Field Number Position Name Explanation 11 – 4 Start Time Start time of a call. 4 digits: HHMM (Hours.Minutes) (24-hour time format) 2 6 – 10 Duration The duration of the call in seconds. 3 12 Condition Code 1, call from PSTN 2, call from INET 3, call with error 4 14 – 45 Dialed Number The dialed number (right-justified). 5 47 – 78 Calling Number The calling telephone number (right-justified). This field is not used in this release of DEFINITY ECS. 680 – 82 Incoming Cir ID The ID number of the PBX circuit used to send the call to the DEFINITY ECS. 3 digits (hundreds, tens, units) 414 – 45 Dialed Number The dialed number (right-justified). 5 47 – 78 Calling Number The calling telephone number (right-justified). This field is not used in this release of DEFINITY ECS.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1392 IP trunk service 20 automatic PSTN fallback mechanism. A file may be empty if there have been no blocks or unblocks of any line pools, and if monitoring for any of the line pools was never started. A new log file is created every time the service is started. Make sure that QoS monitoring is enabled for the line pool of interest through the Properties dialog box under the Quality of Service tab in Configuration Manager. To view the file, in the Windows NT Explorer, find the log file directory and double- click the appropriate file qos_ yyyymmdd_ hhmmss. log. Each record in the QoS file is 65 bytes long and contains information about the quality of service for one line pool at the time that the automatic PSTN fallback mechanism blocked or unblocked that line pool. Data is collected for four fields in each record. These records are detailed in the following chart. Note that: nA record ends with a new line (two bytes, a carriage return, and a line feed character). nThe data is left-justified and padded with blanks. When QoS monitoring is enabled, the DEFINITY ECS application makes the information available to the Windows NT Performance Monitor. To view QoS statistics in the Windows NT Performance Monitor: 1. Click Start, Programs, Administrative Tools. Field Number Position Name Explanation 1 1-15 Time Time that the block or unblock (or start of monitoring) occurred HH.MM.SS.MMM (Hours.Minutes.Seconds.Milliseconds) 2 16-31 IP address Remote IP address of the line pool 3 32-47 QoS parametersThe three quality of service measurements: current round trip delay average round trip delay average packet loss percentage separated by the pipe (|) symbol and expressed in decimal numbers 4 48-63 Action Status of the line pool at the time the record was written; either “block” or “unblock”
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1393 IP trunk service 20 2. Click Performance Monitor. The three QoS parameters will be available for charting or logging under the object QOSMon. 3. Click Close. Making phone calls with computers H.323 is a set of standards for transmitting voice calls over an IP network. A number of Windows-based applications allow telephone calls to be made from one H.323 compliant PC, with a microphone and speakers or headset, over the IP network to another H.323 compliant PC. The DEFINITY IP Trunk application supports H.323 telephone calls and Microsoft NetMeeting. This means that NetMeeting can make a call to a DEFINITY ECS with the DEFINITY IP Trunk application. That switch may route the call off-premise, depending on how the DEFINITY ECS application is configured. Refer to ‘‘Configuring Microsoft NetMeeting™’’ on page 384 for instructions. Interactions nAbbreviated Dialing IP trunks drop the digits after a pause in an abbreviated dial string. nAutomatic callback Automatic callback does not work on DCS over IP trunks. nCall coverage Calls that route to multiple endpoints via call coverage, forwarding, and transfer, including coverage to voicemail, experience lower voice quality over an IP trunk network. nConferencing Multiple parties conferenced over IP trunks experience delay during conversation. nCoverage of Calls Redirected Offnet (CCRON) CCRON does not work over IP trunk. nDirectory Integrated directory information does not appear on display phones connected via IP trunks. nFacility Test Call You can’t use Facility Test Calls to test IP trunk ports.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1394 ISDN service 20 nISDN ISDN features such as 10-digit number display, QSIG , and path replacement do not work over IP trunk. Related topics Refer to the DEFINITY ECS Administration for Network Connectivity for more information on managing IP trunks, including complete administration instructions. Refer to ‘‘ IP Trunk Configuration Manager’’ on page 724 for detailed descriptions of all the fields in Configuration Manager. ISDN service The Integrated Services Digital Network (ISDN) provides a message-oriented signaling method that allows information to be sent along with a call and gives you access to a variety of public and private network services and facilities. The ISDN standard consists of layers 1, 2, and 3 of the Open System Interconnect (OSI) model. DEFINITY ECS can be connected to an Integrated Services Digital Network using standard frame formats: the Basic Rate Interface (BRI) and the Primary Rate Interface (PRI). An Integrated Services Digital Network provides end-to-end digital connections and uses a high-speed interface that provides service-independent access to switched services. Through internationally accepted standard interfaces, an Integrated Services Digital Network provides circuit or packet-switched connections within a network and can link to other ISDN-supported interfaces to provide national and international digital connections. NOTE: DEFINITY ECS Administrator’s Guide does not contain procedures for working with ISDN trunk groups. Due to the complexity of ISDN technology and the potential consequences of errors, ask your Lucent representative to assist you in planning, installing, and administering ISDN trunks. Brief description ISDN supports the following: nCall-by-Call Service Selection (CBC) nDistributed Communications System (DCS). (Only ISDN-PRI supports DCS+ and DCS with Rerouting)
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1395 ISDN service 20 nElectronic Tandem Networks (ETN) nFacility Associated Signaling (FAS) and Non-Facility Associated Signaling (NFAS) (Only ISDN-PRI supports this.) nGeneralized Route Selection (GRS) nCall Identification Display — Calling Party Number (CPN) and Billing Number (BN) nAdministered Connections and Access Endpoints nInterworking (a mixture of ISDN and non-ISDN trunks and stations) nWideband Switching (H0, H11, H12, and NxDS0 — only ISDN-PRI supports this.) nQSIG Multivendor Connectivity nLookahead Inteflow nLookahead Routing nUsage Allocation Screens used to administer ISDN Refer to Access Endpoint to administer Access Endpoints and Wideband Access endpoints. Refer to ISDN trunk group for detailed information on the fields used to administer: — Supplementary Service Protocol (supports public network connection) — Calling Number (supports CPN) — Incoming Call Handling Treatment Table (supports digit manipulation, CPN or BN requests, and night service destinations) — CBC Trunk Group Usage Allocation screen (supports Call-by-Call Service Selection Usage Allocation Plans) — CBC Trunk Group Allocation Plan Assignment Schedule (supports Call-by-Call Service Selection Usage Allocation Plans) — Wideband Support Options (supports Wideband Switching) Refer to ‘‘ ISDN Numbering — Private’’ to administer private numbering plans. Refer to ‘‘ ISDN Numbering — Public/ Unknown’’ to administer ISDN call identification displays.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1396 ISDN service 20 Refer to the DEFINTY services documentation for information about the following screens: ISDN TSC Gateway Channel Assignments, Network Facilities (supports usage allocation used in Call-by-Call Service Selection), and Signaling Group (used to define a group of B-channels for which a given D-channel or D-channel pair carries signaling information). Transmission rate and protocols In ISDN-PRI, the transmission standard for layer 1 (the physical layer) is either DS1 T1 or E1. The DS1 T1 (used in North America and Japan) is a digital-transmission standard that carries traffic at the rate of 1.544 Mbps, and the E1 (used in Europe) carries traffic at a rate of 2.048 Mbps. The “D” (data) channel multiplexes signaling messages for the “B” (bearer) channels carrying voice or data. In a T1, when a D-channel is present, it occupies Channel 24. In an E1, when a D-channel is present, it occupies channel 16. DEFINITY ECS offers several administrable protocols, each of which provides a different set of ISDN services. Refer to ‘‘ DS1 Trunk Service’’ on page 1317 for more information. These protocols are discussed in detail later in this section. The following combination of services, including but not limited to Basic Call, Basic Supplementary Services, Supplementary Services with Rerouting, Display, and QSIG Networking are supported on the ISDN-PRI interface. Available services outside the United States vary from country to country. With ISDN, DEFINITY ECS interfaces with a wide range of other products including switches, network switches, and host computers. These products include earlier DEFINITY communications systems, public network switches (for example, 4ESS, 5ESS, and Northern Telecom DMS250), and other products that adhere to the ISDN signaling protocol.