Home > Lucent Technologies > Communications System > Lucent Technologies DEFINITY Enterprise Communication Server Release 8.2 Administrators Guide

Lucent Technologies DEFINITY Enterprise Communication Server Release 8.2 Administrators Guide

    Download as PDF Print this page Share this page

    Have a look at the manual Lucent Technologies DEFINITY Enterprise Communication Server Release 8.2 Administrators Guide online for free. It’s possible to download the document as PDF or print. UserManuals.tech offer 413 Lucent Technologies manuals and user’s guides for free. Share the user manual or guide on Facebook, Twitter or Google+.

    Page
    of 1707
    							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. 
    						
    All Lucent Technologies manuals Comments (0)

    Related Manuals for Lucent Technologies DEFINITY Enterprise Communication Server Release 8.2 Administrators Guide