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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 1327 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 328. 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.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1328 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
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1329 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 301. 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.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1330 Extended User Administration of Redirected Calls 20 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. Related topics Refer to ‘‘ Setting up telecommuting’’ on page 285 for information about configuring telecommuting.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1331 Facility and Non-Facility Associated Signaling 20 Refer to ‘‘Telecommuting Access’’ on page 951 for information about and field descriptions on the telecommuting screen. Refer to ‘‘ Remote Access’’ on page 857 for information about and field descriptions on the Remote Access screen. Refer to ‘‘ Setting up remote access’’ on page 297 for information about configuring remote access. Refer to ‘‘ Feature Access Code’’ on page 619 for information about and field descriptions on the Feature Access Code screen. Refer to ‘‘ Class of Service’’ on page 532 for information about and field descriptions on the Class of Service screen. Refer to ‘‘ Station’’ on page 882 for information about and field descriptions on the Station screen. Refer to ‘‘ Class of Restriction’’ on page 520 for information about and field descriptions on the Class of Restriction screen. Refer to ‘‘ Setting up call forwarding’’ on page 292 for information about configuring call forwarding. Refer to ‘‘ Assigning coverage options’’ on page 291 for information about assigning two coverage options. 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.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1332 Facility and Non-Facility Associated Signaling 20 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. 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. 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
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1333 Facility and Non-Facility Associated Signaling 20 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. 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
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Features and technical reference 1334 Facility and Non-Facility Associated Signaling 20 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. 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.
DEFINITY ECS Release 8.2
Administrator’s Guide 555-233-506 Issue 1
April 2000
Features and technical reference
1335 Facility and Non-Facility Associated Signaling
20
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.
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: ____ __
DEFINITY ECS Release 8.2
Administrator’s Guide 555-233-506 Issue 1
April 2000
Features and technical reference
1336 Facility and Non-Facility Associated Signaling
20
Signaling Group screen (Group 2) — No D-channel Backup, Two DS1
Interfaces
Signaling Group screen (Group 3) — Facility Associated Signaling
Note the following details in the Signaling Group screens shown above:
nSignaling Group 1 B-channels on DS1 circuit packs (boards) B0 and B1 are
signaled by D-channel pair B1524 (see the Primary D-channel field) and
B1624 (see the Secondary D-channel field).
nSignaling Group 2 B-channels on board B1 are signaled by D-channel
B1824.
nBoard B0 has no D-channel. The B-channels on board B0 can be signaled
by either D-channel pair B1524/B1624 (Signaling Group 1) or D-channel
B1824 (Signaling Group 2).
nThe DS1 interface on board B19 (Signaling Group 3) is a Facility
Associated Signaling case. Note that the Secondary D-channel and Trunk
Board/Interface ID fields are not displayed when the Associated Signaling
field is
y.
SIGNALING GROUP
Group Number : 2 Associated Signaling? n Max number of NCA TSC: 0
Primary D-Channel: 1B1824 Max number of CA TSC: 0
Secondary D-Channel: ______ Trunk Group for NCA TSC: __
Trunk Group for Channel Selection: _____
Trunk Brd Interface ID Trunk Brd Interface ID
1: 1B17 0 11: ____ __
2: 1B18 1 12: ____ __
3: ____ __ 13: ____ __
4: ____ __ 14: ____ __
5: ____ __ 15: ____ __
SIGNALING GROUP
Group Number : 3 Associated Signaling? y Max number of NCA TSC: 0
Primary D-Channel: 1B1924 Max number of CA TSC: 0
Trunk Group for NCA TSC: __
Trunk Group for Channel Selection: _____