Lucent Technologies DEFINITY Enterprise Communications Server Release 8.2 Instructions Manual

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1.1
June 2000
Screen reference 
987 Trunk Group 
17
Dial Access
This field controls whether users can route outgoing calls through an outgoing or 
two-way trunk group by dialing its trunk access code. Allowing dial access does 
not interfere with the operation of AAR/ARS.
!SECURITY ALERT:
Calls dialed with a trunk access code over WATS trunks bypass 
AAR/ARS and aren’t restricted by facility restriction levels. For 
security, you may want to leave the field set to n unless you need dial 
access to test the trunk group.  This field also controls the signaling used by members in public network digital 
trunk groups. This field displays if the Group Type field is 
access, aplt, rlt, 
tandem, or tie. Entries in this field affect which timers appear on the 
Administrable Timers page.
DIOD trunks support pulsed and continuous E&M signaling in Brazil and 
discontinuous E&M signaling in Hungary. Refer to DEFINITY ECS Application 
Notes for Type Approval for more information. Use the following entries for 
DIOD trunks. Use these values only when all trunk group members are assigned 
to a TN464F (or later version) or TN2464 circuit pack.
pulsed
cont
discont
blank Brazil E&M trunks can use continuous and pulsed E&M. For 
continuous E&M signaling, set this field to 
cont. For pulsed 
E&M signaling, set this field to 
pulsed. A blank setting 
provides R2 signaling.
Hungary uses discontinuous E&M signaling when this field is 
dis.
Valid entries Usage
y
Allows users to access the trunk group by dialing its access 
code.
n Does not allow users to access the trunk group by dialing its 
access code. Attendants can still select this trunk group with a 
Trunk Group Select button.
Valid entries Usage 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1.1
June 2000
Screen reference 
988 Trunk Group 
17
Busy Threshold
Use this field if you want attendants to control access to outgoing and two-way 
trunk groups during periods of high use. When the threshold is reached and the 
warning lamp for that trunk group lights, the attendant can activate trunk group 
control: internal callers who dial out using a trunk access code will be connected 
to the attendant, and the attendant can prioritize outgoing calls for the last 
remaining trunks. Calls handled by AAR and ARS route patterns go out normally.
Night Service
This field sets the destination to which incoming calls go when Night Service is in 
operation. If a Night field on the Group Member Assignments page is 
administered with a different destination, that entry will override the group 
destination for that trunk. CPE, DID, and DIOD trunk groups do not support night 
service.
Tip:
Whenever possible, use a night service destination on your switch: 
otherwise some features won’t work correctly, even over a DCS network.
Valid entries Usage
1 
to 99 
(
G3si/csi)Enter the number of trunks that must be busy in order to light 
the warning lamp on the Attendant Console. For example, if 
there are 30 trunks in the group and you want to alert the 
attendant whenever 25 or more are in use, enter 
25.1 to 255 (G3r)
Valid entries Usage
blank Leave this field blank if the Trunk Type (in/out) field is not 
auto/….
An extension 
number (can be 
a VDN)Enter the extension of your night service destination.
attdCalls go to the attendant and are recorded as Listed Directory 
Number (LDN) calls on call detail records. 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1.1
June 2000
Screen reference 
989 Trunk Group 
17
Queue Length
Outgoing calls can wait in a queue, in the order in which they were made, when all 
trunks in a trunk group are busy. If you enter 0, callers receive a busy signal when 
no trunks are available. If you enter a higher number, a caller hears confirmation 
tone when no trunk is available for the outgoing call. The caller can then hang up 
and wait: when a trunk becomes available, the switch will call the extension that 
placed the original call. The caller will hear 3 short, quick rings. The caller 
doesn’t need to do anything but pick up the handset and wait: the switch 
remembers the number the caller dialed and automatically completes the call.
This field appears when the Direction field is outgoing or two-way. 
Tip:
Enter 0 for DCS trunks.
Country
This field is administered at installation and sets numerous parameters to 
appropriate values for the public network in which the switch operates. For 
example, the value of this field, with the values of the Trunk Termination and the 
Trunk Gain fields, determines the input and trans-hybrid balance impedance 
requirements for ports on TN465B, TN2146, and TN2147 circuit packs.
This field appears for the trunk groups that connect DEFINITY ECS to a central 
office in the public network — CO, DID, DIOD, FX, and WATS trunk groups.
!CAUTION:
Don’t change this field. If you have questions, contact your Lucent 
representative.
Valid entries Usage
0
 to 100Enter the number of outgoing calls that you want to be held 
waiting when all trunks are busy. 
Valid entries Usage
1
 to 25Set at installation.
11If the Country field is 11, DEFINITY ECS is administered for 
Public Network Call Priority (Call Retention and Rering).
14If the Country field is 14 and the Group Type is DID or DIOD, 
the CO Type field appears. 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1.1
June 2000
Screen reference 
990 Trunk Group 
17
Ve rs i o n
Use this field to adjust the signaling on multi-country CO trunk circuit packs. 
Entries in this field adjust signaling characteristics on these circuit packs to match 
the signaling characteristics of the public network in a specific country. The field 
appears only for CO, FX, and WATS trunk groups when the Country field is 
5, 16, 
or 
23.
15If the Country field is 15, DEFINITY ECS is administered for 
Public Network Call Priority (Intrusion and Rering). Also, the 
Protocol Type field appears for Group Type DID or DIOD.
18If the Country field is 18, DEFINITY ECS can be administered 
for Public Network Call Priority (Mode of Release Control, 
Forced Disconnect, and Rering).
23If the Country field is 23 and the Group Type field is either CO 
or DID, DEFINITY ECS is administered for Block Collect 
Calls.
Valid entries Usage
If the Country field is 5, the Version field only controls TN2147 ports.
a Enter a to use standard signaling for the Netherlands public 
network.
bEnter b to use country 1 (U.S.) signaling. The value b is 
appropriate if your switch is connected to a central office using 
an Ericcson AXE-10 switch.
If the Country field is 
16 or 23, the Version field sets the input impedance value 
and only controls TN465C (vintage 2 or later) ports.
a Enter a to set input impedance to 600 Ohms.
bEnter b to set input impedance to 900 Ohms. The value b is 
appropriate in Brazil.
Valid entries Usage 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1.1
June 2000
Screen reference 
991 Trunk Group 
17
Incoming Destination
Use this field to set the destination for all incoming calls on trunk groups such as 
CO, FX, and WATS that must terminate at a single destination. The destination 
you enter here is also the default night service destination unless you enter a 
different destination in the Night Service field. Appears when the Direction field 
is 
incoming or two-way.
Comm Type
Use this field to define whether the trunk group carries voice, data, or both.
NOTE:
Comm Types of avd, rbavd and data require trunk member ports on a DS1 
circuit pack.
Valid entries Usage
blank Leave this field blank if the Trunk Type (in/out) field is not 
auto/….
an extension 
numberCalls go to the extension you enter. You may enter any type of 
extension, though typically the extension entered here 
identifies a VDN, a voice response unit, or a voice messaging 
system. Night service overrides this setting when it’s active.
attdCalls go to the attendant and are recorded as Listed Directory 
Number (LDN) calls on call detail records.
Valid 
entries Usage
avd
Enter avd for applications that mix voice and Digital Communication Protocol 
data, such as video conferencing applications. The receiving switch 
discriminates voice calls from data calls and directs each to an appropriate 
endpoint. Neither originating nor terminating switches insert a modem poll for 
any calls when Comm Type is 
avd. 
The Signaling Mode field on the DS1 circuit pack screen must be set for either 
common-chan or CAS signaling.
dataEnter data only when all calls across the trunk group originate and terminate at 
DEFINITY ECS digital data endpoints. Public networks don’t support 
data: 
supported by Lucent’s DCP protocol, this entry is used almost exclusively for 
the data trunk group supporting DCS signaling channels.
The Signaling Mode field on the DS1 circuit pack may be set to 
robbed-bit or 
com
mon-chan.  
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1.1
June 2000
Screen reference 
992 Trunk Group 
17
Auth Code
This field affects the level of security for tandemed outgoing calls at your switch. 
This field appears if the Direction field is incoming or two-way, and it can only be 
y if the Authorization Codes field is y on the System-Parameters 
Customer-Options screen.
Digit Absorption List
This field assigns a digit absorption list, when used, to a trunk group that 
terminates at a step-by-step central office.
Prefix-1
Use this field for outgoing and two-way trunk groups handling long distance 
service. This field appears for CO, FX, and DIOD trunk groups.
rbavdFor digital trunk groups that carry voice and data with robbed-bit signaling.
The Signaling Mode field on the DS1 circuit pack screen must be set to 
robbed-bit unless mixed mode signaling is allowed on the DS1 circuit pack. In 
that case, the Signaling Mode field may be 
isdn-ext or isdn-pri.
voice For trunk groups that carry only voice traffic and voice-grade data (that is, data 
transmitted by modem). Analog trunk groups must use 
voice.
Valid entries Usage
y/n
Enter y to require callers to enter an authorization code in order 
to tandem a call through an AAR or ARS route pattern. The 
code will be required even if the facility restriction level of the 
incoming trunk group is normally sufficient to send the call out 
over the route pattern.
Valid entries Usage
0
 to 4Enter the number of the digit absorption list this trunk group 
should use.
Valid entries Usage
y/n
Enter y to add the prefix “1” to the beginning of the digit string 
for outgoing calls. Do not enter 
y for trunk groups in AAR or 
ARS route patterns. 
Valid 
entries Usage 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1.1
June 2000
Screen reference 
993 Trunk Group 
17
Trunk Flash
Some central offices allows users to activate special services (call waiting or 
3-way conferencing, for example) by flashing the switch hook on their phone. If 
an outside caller does this while they’re on a call with one of your users, your 
switch may interpret the flash as a disconnect signal and end the call. Use this 
field to prevent such accidental disconnections.
Toll Restricted
BCC
Generalized Route Selection uses the BCC to select the appropriate facilities for 
routing voice and data calls. Far-end tandem switches also use the BCC to select 
outgoing routing facilities with equivalent BCC classes.The entry in the Bearer 
Capability Class field is used to select the appropriate facilities for incoming 
ISDN calls. DEFINITY ECS compares the entry in the BCC field to the value of 
the Bearer Capability information element for the incoming call and routes the 
call over appropriate facilities. For example, a call with BCC 4 will only be 
connected through facilities that support 64 kbps data transmission.
The Bearer Capability Class field appears when all of the following are true:
nEither the ISDN-BRI Trunks field or the ISDN-PRI field on the System 
Parameters Customer-Options screen is 
y.
nThe Group Type field is access, co, fx, tandem, tie, or wats.
nThe Comm Type field is data, avd, or rbavd. 
Valid entries Usage
y/n 
Enter y so that your switch won’t disconnect incoming callers 
who flash their switch hook to activate central office services.
Valid entries Usage
y
 Enter y to prevent toll-restricted users from using a trunk 
access code to make restricted outgoing calls over this trunk 
group.
nEnter n if the Outgoing Dial Type field is automatic or if you 
don’t want to restrict access.
Valid entries Usage
0
For voice and voice-grade data
1For 56 kbps synchronous data transmitted with robbed-bit 
signaling 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1.1
June 2000
Screen reference 
994 Trunk Group 
17
ITC 
The Generalized Route Selection feature, part of the automatic routing technology 
used in DEFINITY ECS, compares the line coding of available digital facilities 
and selects appropriate routes for voice and data calls. The Information Transfer 
Capability field appears when the Comm Type field is data, avd, or rbavd and the 
BCC field is not 0. 
Tip:
To find out what kind of line coding a trunk group member uses, check the 
Line Coding field on the DS1 Circuit Pack screen for the DS1 port to which 
the member is assigned.
Trunk Type
Use this field to control the seizure and start-dial signaling used on this trunk 
group. Entries in this field vary according to the function of the trunk group and 
must match the corresponding setting on the far-end switch. This field appears for 
CO, DID, FX, and WATS trunk groups.
Refer to ‘‘
Transmission and supervisory signaling’’ on page 1581 for more 
information. Procedures in ‘‘
Managing trunks’’ on page 349 give specific 
suggestions for signaling to use with different types of trunk groups. 
2Less than 19.2 kbps synchronous or asynchronous data
3For 64 kbps data and LAPD protocol
4For 64 kbps data on unrestricted channels
Valid entries Usage
rest
(ricted)  Restricted trunks use ami-basic or ami-zcs line coding and 
can carry only restricted calls.
unre(stricted) Unrestricted trunks use b8zs, hdb3, or cmi line coding and can 
carry restricted or unrestricted calls. A trunk group with an 
unrestricted ITC may have only unrestricted trunks as 
members.
Valid entries Usage
ground-start 
Use ground-start signaling for two-way trunks whenever 
possible: ground-start signaling avoids glare and provides 
answer supervision from the far end.
loop-startIn general, try to use loop-start signaling only for one-way 
trunks. Loop-start signaling is susceptible to glare and does not 
provide answer supervision. 
Valid entries Usage 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1.1
June 2000
Screen reference 
995 Trunk Group 
17
auto/autoThe term before the slash tells the switch how and when it will 
receive incoming digits. The term after the slash tells the 
switch how and when it should send outgoing digits.
nauto — Used for immediate connection to a single preset 
destination (incoming CO trunks, for example). No digits 
are sent, because all calls terminate at the same place.
ndelay — The sending switch does not send digits until it 
receives a delay dial signal (an off-hook signal followed by 
an on-hook signal) from the far-end switch, indicating that 
it’s ready to receive the digits.
nwink — The sending switch does not send digits until it 
receives a a wink start (momentary off-hook) signal from 
the far-end switch, indicating that it’s ready to receive the 
digits.
nimmed — The sending switch sends digits without waiting 
for a signal from the far-end switch.
auto/delay
auto/immed
auto/wink
2-wire-ac
These entries are used with CO trunks in Russia: enter the type 
of connection to your central office. Check with you network 
service provider if you don’t know what type of connection 
they’re using. To use these entries, the Country field must be 
15 and the CO trunks must use ports on a TN2199 circuit 
board.
2-wire-dc
3-wire Valid entries Usage 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1.1
June 2000
Screen reference 
996 Trunk Group 
17
Trunk Type (in/out)
Use this field to control the seizure and start-dial signaling used on this trunk 
group. The setting of the Trunk Signaling Type field can affect the entries allowed 
in this field. In addition, settings may differ for incoming and outgoing trunks. 
Tip:
When incoming trunks use the setting immed/immed, the far-end switch 
seizes the trunk and sends digits without waiting for acknowledgment from 
the receiving switch. When traffic is heavy, the receiving switch may not 
immediately attach a Touch Tone Receiver to a call and therefore lose digits. 
Use wink-start trunks or increase the dial-guard timer value on the far-end 
switch to avoid this problem.
Valid entries Usage
auto
cont
delay
disc
immed
wink
There are numerous valid entries for this field: use the online help in the 
switch administration software to view all the possible combinations. Here 
are what the elements used in those combinations mean:
nauto — Used for immediate connection to a single preset destination 
(incoming CO trunks, for example). No digits are sent, because all calls 
terminate at the same place.
ncont — Continuous signaling is used with Italian E&M tie trunks. The 
switch seizes a trunk by sending a continuous seizure signal for at least 
the duration specified by the Incoming Seizure Timer. Refer to ‘‘
Trunk 
Signaling Type’’ on page 986 for more information.
ndelay — The sending switch does not send digits until it receives a delay 
dial signal (an off-hook signal followed by an on-hook signal) from the 
far-end switch, indicating that it’s ready to receive the digits.
ndisc —Discontinuous signaling is used with Italian tie trunks that use 
E&M signaling. The switch can seize a trunk by sending a single, short 
signal for the duration specified by the Normal Outgoing Seize Send 
field. However, with the Three-Way Seizure option the calling switch 
can also send routing information to the called switch by sending one or 
a series of brief seizure signals.
nwink — The sending switch does not send digits until it receives a a 
wink start (momentary off-hook) signal from the far-end switch, 
indicating that it’s ready to receive the digits.
nimmed — The sending switch sends digits without waiting for a signal 
from the far-end switch.
2-wire-acThese entries are used with CO trunks in Russia: enter the type of 
connection to your central office. Check with you network service provider 
if you don’t know what type of connection they’re using. To use these 
entries, the Country field must be 
15 and the CO trunks must use ports on a 
TN2199 circuit board.
2-wire-dc
3-wire