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Lucent Technologies DEFINITY Enterprise Communications Server Release 8.2 Instructions Manual

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    							DEFINITY ECS Release 8.2
    Administrator’s Guide  555-233-506  Issue 1.1
    June 2000
    Features and technical reference 
    1337 Extended User Administration of Redirected Calls 
    20
    Emergency Transfer panels are available in multiples of five telephones, which 
    may be pulse-dialing or touch-tone phones. You must use pulse dialing if the CO 
    accepts dial pulses only. Each telephone can be connected to a separate CO.
    When your system is not in Emergency Transfer mode, transfer phones can be 
    used as regular telephone.
    Interactions
    nNight Service
    If a power failure occurs when the system is in night service, the system 
    automatically returns to night service when power returns.
    Extended User Administration of 
    Redirected Calls
    Extended User Administration of Redirected Calls allows you to change your 
    lead-coverage path or your call forwarding from any local (on-site) or remote 
    (off-site) location.
    !SECURITY ALERT:
    Invalid extensions and invalid station security codes are logged as security 
    violations. The extension or incoming trunk from which the command 
    sequence was dialed, the Feature Access Code (FAC), and the dialed 
    command string appear on the Monitor Security-Violations Station Security 
    Codes screen or report if Security Violation Notification is enabled.
    For administration information about tracking security violations, refer to 
    ‘‘
    Setting up security violations notification’’ on page 341.
    Detailed description
    This feature does not change Call Coverage, nor does it change Call Forwarding 
    All Calls or the Call Forwarding Busy/Don’t Answer. It merely allows you to 
    select between one of two previously administered coverage paths or to change 
    your forwarding from any on-site or off-site location.
    Telecommuting access extension
    The telecommuting access extension allows you to use Extended User 
    Administration of Redirected Calls from off-site. If you want to quickly disable 
    the feature for all users, change the Telecommuting Access Extension to blank.  
    						
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    Features and technical reference 
    1338 Extended User Administration of Redirected Calls 
    20
    If you are operating in a Distributed Communications System (DCS) 
    environment, you need to assign a different telecommuting-access extension to 
    each switch and tell your users which extension they should use. You can use 
    Extended User Administration of Redirected Calls from any of the DCS nodes, 
    but you need to dial the telecommuting-access extension of the node on which 
    your station is defined before using the feature access code.
    Extended User Administration of Redirected 
    Calls and COS
    The following table shows the relationship between class of service (COS) and a 
    your ability to use call forwarding at the your station without a security code or 
    from any on-site or off-site location with a security code.
    COR
    Class of Restriction (COR) controls the use of the change coverage option of 
    Extended User Administration of Redirected Calls. This means that, if the Can 
    Change Coverage field on the COR screen is set to 
    y, you can use the Change 
    Coverage FAC to change your coverage option.
    How to use from an attendant or 
    console-permissions station
    To use Extended User Administration of Redirected Calls from an attendant or 
    console-permissions station is the same as that described for a user, except 
    console-permissions stations and attendants do not need to enter a station security 
    code, nor do they need to press the pound key (#).
    Table 49. COS and Extended User Administration of Redirected Calls of Call 
    Forwarding
    If the user’s COS are set to these values Then the user’s call forwarding capability 
    is
    Call 
    Fwd 
    All 
    COSCall 
    Fwd 
    B/DA 
    COSExtended 
    Call Fwd 
    Activate 
    All COSExtended 
    Call Fwd 
    Activate 
    Busy D/A 
    COSUsers can 
    forward calls 
    from their station 
    without a 
    security codeUsers can forward 
    calls from their 
    station or from 
    another location with 
    a security code
    Yes Yes Yes Yes Yes Yes
    No No Yes Yes No Yes
    Yes Yes No No Yes No 
    						
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    June 2000
    Features and technical reference 
    1339 Extended User Administration of Redirected Calls 
    20
    How to use from an off-site location
    To use Extended User Administration of Redirected Calls from off-site, you must 
    first access the telecommuting-access extension. If you make the request via 
    Direct Inward Dialing (DID), you must precede the extension with the correct 
    public-network prefix. If you make the request via a trunk group dedicated to 
    remote access of this feature, you must dial the public-network number for the 
    trunk group.
    The system provides dial tone after you access the telecommuting access 
    extension. At that point you can enter only one of the four FACs associated with 
    this feature. The 4 FACs associated with Extended User Administration of 
    Redirected Calls are:
    nExtended Call Fwd All Activate
    nExtended Call Fwd Busy D/A Activate
    nExtended Call Fwd Deactivation
    nChange Coverage
    When the system provides dial tone, you can proceed with the steps outlined for 
    on-site use of the feature in ‘‘
    Training users’’ on page 313.
    How to interrupt the command sequence
    To interrupt the command sequence and begin again, you can enter an asterisk (*) 
    at any point before the second pound sign. The system provides dial tone, and you 
    can begin the command sequence at the point of entering your extension. (You 
    should not enter the FAC again.) The interrupted command sequence is not 
    recorded as an invalid attempt.
    Interactions
    nBridged Appearance
    When the pound key (#) is pressed from a bridged appearance immediately 
    following any of this feature’s four FACs, the system assumes the currently 
    active bridged extension will be administered. The station security code of 
    the currently active bridged extension must be entered after the initial # to 
    successfully complete the command sequence.
    If the station has only bridged appearances, the station’s extension must be 
    dialed after the FAC to successfully complete the command sequence, 
    since the station’s extension is not associated with any appearances. 
    						
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    Features and technical reference 
    1340 Extended User Administration of Redirected Calls 
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    nCall Coverage
    Extended User Administration of Redirected Calls interacts with this 
    feature only in that system users can change their lead-coverage path.
    An attempt to activate Send All Calls is denied if the currently active 
    coverage path does not allow Send All Calls in its coverage criteria. 
    However, if you activate Send All Calls when it is allowed, and then 
    change your coverage path to one that does not allow Send All Calls, the 
    Send All Calls button remains lit and Send All Calls automatically resumes 
    if you change back to the coverage path that allows it.
    nCall Forwarding 
    When Call Forwarding is active, the status lamps for the active features for 
    that extension are lit. When Call Forwarding is deactivated, the status 
    lamps for both Call Forward All and Call Forward Busy/DA buttons for 
    that extension are extinguished. Off-net forward destinations are not 
    allowed.
    nDistributed Communications System
    Assign a different telecommuting access extension for each switch. You 
    can use Extended User Administration of Redirected Calls from any of the 
    DCS nodes, but you must dial the extension of the node on which your 
    station is defined before dialing the FAC.
    nSecurity Violation Notification
    Extended User Administration of Redirected Calls security violations are 
    tracked and reported by SVN for station security codes, if it is enabled.
    nTenant Partitioning
    The telecommuting access extension is always automatically assigned to 
    Tenant Partition 1, so it can be accessed by all tenants.
    The tenant number of the extension administered must be accessible by the 
    tenant number from which the Extended User Administration of Redirected 
    Calls FAC is dialed or the request is denied. If the FAC is being dialed on 
    site, the tenant number of the station or attendant must have access to the 
    tenant number of the extension administered. If the FAC is dialed off site, 
    the tenant number of the incoming trunk must have access to the tenant 
    number of the extension administered. 
    						
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    1341 Extended User Administration of Redirected Calls 
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    Related topics
    Refer to ‘‘
    Setting up telecommuting’’ on page 297 for information about 
    configuring telecommuting.
    Refer to ‘‘
    Telecommuting Access’’ on page 963 for information about and field 
    descriptions on the telecommuting screen.
    Refer to ‘‘
    Remote Access’’ on page 870 for information about and field 
    descriptions on the Remote Access screen.
    Refer to ‘‘
    Setting up remote access’’ on page 310 for information about 
    configuring remote access.
    Refer to ‘‘
    Feature Access Code’’ on page 633 for information about and field 
    descriptions on the Feature Access Code screen.
    Refer to ‘‘
    Class of Service’’ on page 545 for information about and field 
    descriptions on the Class of Service screen.
    Refer to ‘‘
    Station’’ on page 894 for information about and field descriptions on 
    the Station screen.
    Refer to ‘‘
    Class of Restriction’’ on page 533 for information about and field 
    descriptions on the Class of Restriction screen.
    Refer to ‘‘
    Setting up call forwarding’’ on page 305 for information about 
    configuring call forwarding.
    Refer to ‘‘
    Assigning coverage options’’ on page 303 for information about 
    assigning two coverage options. 
    						
    							DEFINITY ECS Release 8.2
    Administrator’s Guide  555-233-506  Issue 1.1
    June 2000
    Features and technical reference 
    1342 Facility and Non-Facility Associated Signaling 
    20
    Facility and Non-Facility Associated 
    Signaling
    Facility Associated Signaling (FAS) allows an ISDN-PRI T1/E1 interface 
    D-channel to carry signaling information for all the bearer (B) channels on its 
    associated span.
    Non-Facility Associated Signaling (NFAS) allows 1 ISDN-PRI T1/E1 interface 
    D-channel to carry signaling information for up to 300 bearer (B) channels on its 
    associated spans. In other words, a D-channel can carry signaling information for 
    numerous B-channels located on different DS1 circuit packs.
    NOTE:
    NFAS is only valid for T1/E1 Country Protocol 1. Digital T1 service is also 
    sometimes called “DS1” to distinguish it from analog T1 service.
    ISDN-BRI trunks don’t support Non-Facility Associated Signaling.
    Brief Description
    D-Channel Backup with NFAS
    When NFAS is used, a backup D-channel can be administered to improve 
    reliability. The system switches to the backup D-channel if a signaling link failure 
    occurs on the primary D-channel span.
    One D-channel is administered as the Primary D-channel and another D-channel 
    is administered as the Secondary D-channel. These assignments ensure that both 
    D-channels are in the same state at the same time and neither can be used to carry 
    B-channel traffic at any time. The Primary D-channel is given precedence over the 
    Secondary D-channel.
    When D-Channel Backup is activated, all calls that have been answered are 
    preserved. However, some call-related information may be lost. Calls that are not 
    answered when D-channels are switched also may lose call-related information.
    The figure below shows a possible configuration involving 3 ISDN-PRIs between 
    a DEFINITY ECS and another DEFINITY ECS or the public network.  
    						
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    1343 Facility and Non-Facility Associated Signaling 
    20
    With T1 (24 channel) interfaces, 2 of the ISDN-PRIs contain a D-channel and 23 
    B-channels, while the other ISDN-PRI contains 24 B-channels. One of the 
    D-channels is the Primary D-channel, and the other is the Secondary D-channel. 
    Together, this pair of D-channels signals for all 70 (23+24+23) B-channels in the 
    3 Primary Rate Interfaces.
    Since the D-channels are signaling for more than one ISDN-PRI facility, 
    D-Channel Backup requires the use of NFAS. At any given time, one of the two 
    D-channels is carrying Layer 3 signaling messages, while the other D-channel is 
    active at layer 2, but in standby mode only. Any layer 3 messages received over 
    the standby D-channel are ignored. Since only one of the D-channels can be active 
    at a time, load sharing between the two D-channels is not possible. The two 
    D-channels can provide signaling for only a predefined set of B-channels and 
    cannot dynamically backup other D-channels on other interfaces.
    Figure Notes
    1. DEFINITY ECS
    2. Secondary D-Channel
    3. Primary D-Channel4. ISDN-PRI controlled by D-Channel
    5. Network Far-End Switch DEFINITY ECS
    r781799 CJL 060996 
    						
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    1344 Facility and Non-Facility Associated Signaling 
    20
    D-Channel Backup activation
    nD-Channel Failure
    If the signaling link fails on the active D-channel (D1) or the hardware 
    carrying D1 fails, the system sends a message over the standby D-channel 
    (D2). D2 then becomes the active D-channel and carries all subsequent 
    signaling messages. When the signaling link or hardware on D1 recovers 
    from the failure, D1 becomes the standby D-channel.
    nSystem Technician Commands
    If a system technician commands that a D-channel switchover take place, 
    the first action taken by the system is to tear down the signaling link on D1. 
    After this is completed, a message is sent on D2 to request that D2 become 
    the active D-channel. D2 then becomes the active D-channel and the 
    switchover is complete.
    Screens used to administer FAS and NFAS
    The following list shows the required screens and the fields you must use on each 
    screen:
    nSignaling Group (Refer to the DEFINTY services documentation for 
    information about this screen.)
    —all
    nISDN trunk group
    —Port
    —Sig Grp
    nDS1 Circuit Pack
    — Signaling Mode
    Guidelines for administering FAS and NFAS
    Coordinate the following when implementing FAS and NFAS:
    nDecide which T1/E1 facilities will use FAS.
    nDecide which of the remaining T1/E1 facilities carries D-channel signaling 
    information on the 16th (E1) or 24th (T1) channel. For those channels that 
    have a D-Channel Backup, D-channel pairs must be allocated. 
    						
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    Features and technical reference 
    1345 Facility and Non-Facility Associated Signaling 
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    nDefine Signaling Groups. A Signaling Group is a group of B-channels for 
    which a given D-channel (or D-channel pair) carries the signaling 
    information. Each Signaling Group must be designated as either a FAS or 
    NFAS Signaling Group.
    — A FAS Signaling Group must contain all the ISDN B-Channels on 
    the T1/E1 interface associated with the group’s D-channel, and 
    cannot contain B-channels from any other DS1 circuit pack. For 
    24-channel DS1 boards, some of the DS1 ports may use in-band 
    (robbed-bit) signaling and be members in a tie trunk group rather 
    than an ISDN trunk group. These tie trunks cannot be members of a 
    Signaling Group.
    — There is no restriction on which T1/E1 ports can belong to an NFAS 
    Signaling Group. Normally, an NFAS Signaling Group consists of 
    one or two D-channels and several complete T1/E1 interfaces.
    — If a Signaling Group contains only a subset of a T1/E1’s B-channels 
    (ports 1–12, for example), it is considered an NFAS Signaling 
    Group, not a FAS Signaling Group. The remaining B-channels on 
    the T1/E1 are then assigned as members of another NFAS Signaling 
    Group.
    nAn Interface ID must be assigned to each T1/E1 facility in an NFAS 
    Signaling Group. For example, if the B-channels in a Signaling Group span 
    3 T1/E1 facilities, a unique Interface ID must be assigned to each of the 3 
    facilities. This designation is required to uniquely identify the same 
    B-channel (port) number on each of the T1/E1 facilities in the Signaling 
    Group. Therefore, this interface must be agreed upon by both sides of the 
    interface and administered prior to initialization.
    nPrimary and Secondary D-Channel Backup must be agreed upon by both 
    sides of the interface and administered prior to initialization. If the IDs do 
    not match, the signaling group will come up but calls will fail.
    The following screens show the DS1 interface configuration for NFAS. When 
    implementing FAS and NFAS, the DS1 screen must be submitted first, followed 
    by the Interface Link and associated forms, followed by the ISDN-PRI trunk 
    group, Signaling Group, and Trunk Group Members forms.
    The Interface Link and associated forms may be administered at any time after the 
    DS1 screens have been administered, with the following restrictions:
    nA D-channel cannot be assigned on a Signaling Group screen unless the 
    associated link is disabled.
    nA trunk member cannot be assigned unless its associated Signaling Group 
    has been administered. 
    						
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    Features and technical reference 
    1346 Facility and Non-Facility Associated Signaling 
    20
    The Signaling Mode field must be specified for each DS1 circuit pack. Because 
    this circuit pack has the Signaling Mode field set to isdn-ext, all trunks on this 
    circuit pack are signaled using either inband robbed-bit signaling or a D-channel 
    on another DS1 circuit pack. 
    DS1 Circuit Pack screen
    Next, Signaling Groups are administered using Signaling Group screens.
    Signaling Group screen (Group 1) — D-channel Backup, Three DS1 Interfaces
     
                        DS1 CIRCUIT PACK
                Location: 1B17                            Name: _______________
                Bit Rate: 2.048                              Line Coding: hdb3
    Signaling Mode: isdn-ext
    Interface Companding: 5law
               Idle Code: 11111111
            MAINTENANCE PARAMETERS
          Slip Detection? n                      Remote Loop-Around Test? n
     
    SIGNALING GROUP
    Group Number : 1     Associated Signaling? n         Max number of NCA TSC: 0
                            Primary D-Channel: 1B1524     Max number of CA TSC: 0
                          Secondary D-Channel: 1B1624  Trunk Group for NCA TSC: __
            Trunk Group for Channel Selection: _____
        Trunk Brd    Interface ID        Trunk Brd    Interface ID
      1:   1B15  0 11:   ____           __
      2:   1B16          1  12:   ____           __
      3:   1B17          2  13:   ____           __
      4:   ____          __            14:   ____           __
      5:   ____          __            15:   ____           __ 
    						
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