Lucent Technologies DEFINITY Enterprise Communication Server Release 8.2 Administrators Guide

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Screen reference 
997 Trunk Group 
17
NOTE:
Even if the trunk group supports full-duplex transmission, other equipment 
in a circuit may not.
Disconnect Supervision-In
This field indicates whether the switch receives disconnect supervision for 
incoming calls over this trunk group. It appears when the Direction field is 
incoming or two-way. (If the Direction field is outgoing, the switch internally 
sets this field to 
n.)
The entry in this field is crucial if you allow trunk-to-trunk transfers. (To allow 
trunk-to-trunk transfers involving trunks in this group, this field must be 
y and the 
Trunk-to-Trunk Transfer field on the Feature-Related System Parameters screen 
must be 
y). If a user connects 2 trunks through conference or transfer, and neither 
far-end switch on the resulting connection provides disconnect supervision, the 
trunks involved will not be released because DEFINITY ECS can’t detect the end 
of the call. DEFINITY ECS will not allow trunk-to-trunk transfers unless it 
believes that at least one party on the call can provide disconnect supervision. 
Therefore, setting this field incorrectly may cause trunks to become unusable until 
the problem is detected and the trunks are reset. 
!CAUTION:
In general, U.S. central offices provide disconnect supervision for incoming 
calls but not for outgoing calls. Public networks in most other countries do 
not provide disconnect supervision for incoming or outgoing calls. Check 
with your network services provider. 
Valid entries Usage
full
 Enter full in most cases: this allows simultaneous two-way 
transmission, which is most efficient. 
halfEnter half to support only one transmission direction at a time.
Valid entries Usage
y
Enter y if (a) the far-end switch sends a release signal when the 
calling party releases an incoming call, and (b) you want to 
make the far-end switch responsible for releasing the trunk. 
This entry allows trunk-to-trunk transfers involving trunks in 
this group.
nEnter n if the far-end switch doesn’t provide a release signal, if 
your hardware can’t recognize a release signal, or if you prefer 
to use timers for disconnect supervision on incoming calls. 
Entering 
n prevents trunk-to-trunk transfers involving trunks in 
this group. 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Screen reference 
998 Trunk Group 
17
Disconnect Supervision-Out
This field indicates whether the switch receives disconnect supervision for 
outgoing calls over this trunk group. It appears when the Direction field is either 
outgoing or two-way. (If the Direction field is incoming, the switch internally 
sets this field to 
n.)
The entry in this field is crucial if you allow trunk-to-trunk transfers. (To allow 
trunk-to-trunk transfers involving trunks in this group, this field must be 
y and the 
Trunk-to-Trunk Transfer field on the Feature-Related System Parameters screen 
must be 
y). If a user connects 2 trunks through conference or transfer, and neither 
far-end switch on the resulting connection provides disconnect supervision, the 
trunks involved will not be released because DEFINITY ECS can’t detect the end 
of the call. DEFINITY ECS will not allow trunk-to-trunk transfers unless it 
believes that at least one party on the call can provide disconnect supervision. 
Therefore, setting this field incorrectly may cause trunks to become unusable until 
the problem is detected and the trunks are reset.
Also, remember that DEFINITY ECS must receive answer supervision on 
outgoing analog CO, FX, WATS, Tie, Tandem, and Access trunks before it will 
recognize a disconnect signal. If this trunk group does not receive answer 
supervision from the far-end switch, and you enter y in this field, DEFINITY ECS 
will internally set the field to n. 
!CAUTION:
Do not set this field to 
y unless you are certain that the far-end switch will 
provide answer supervision and disconnect supervision. Most public 
networks do not provide disconnect supervision over analog trunks. Check 
with your network services provider. 
Valid entries Usage
y
Enter y if (a) the far-end switch sends a release signal when the 
called party releases a call an outgoing call, and (b) you want to 
make the far-end switch responsible for releasing the trunk. 
This entry allows trunk-to-trunk transfers involving trunks in 
this group.
The Answer Supervision Timeout field must be 
0 and the 
Receive Answer Supervision field must be 
y for the switch to 
recognize a 
y entry.
n Enter n if the far-end switch doesn’t provide a release signal, if 
your hardware can’t recognize a release signal, or if you prefer 
to use timers for disconnect supervision on outgoing calls. 
Entering 
n prevents trunk-to-trunk transfers involving trunks in 
this group. 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Screen reference 
999 Trunk Group 
17
Cyclical Hunt
When a call is offered to a trunk group, the switch searches for an available trunk. 
This field, which appears when the Direction field is
 two-way and the Trunk Type 
field is
 loop-start, controls the starting point of the search. 
You can change this field from 
n to y at any time. To change from y to n, however, 
all the trunks in the group must be idle or busied out.
Disconnect Type
This field indicates which side or user controls the disconnect, where A refers to 
the calling party and B refers to the called party. Appears only if the Country field 
is 
15 and the Trunk Type field is 2-wire-ac, 2-wire-dc, or 3-wire.
This applies only to the TN2199 port.
Send Answer Supervision
This field appears when the Trunk Signaling Type field is 
cont or dis and only 
applies to TN2140 ports.
Answer Supervision Timeout
If the Receive Answer Supervision field is 
n, use this field to set the answer 
supervision timer for outgoing and two-way trunks. During a cut-through 
operation, timing begins after each outgoing digit is sent by the switch and timing 
Valid entries Usage
y
 Enter y to have the switch start its search from the last trunk 
seized. This method is faster, and thus better suited for 
high-traffic trunk groups.
nEnter n to have the switch start each search at member 1 (the 
first trunk administered on the Group Member Assignments 
page).
Valid entries Usage
A and B
A or B
 
Valid entries Usage
y/n 
Enter y to make your switch signal the calling switch when an 
incoming call is answered. You can only set this field to 
y if the 
Direction field is 
incoming or two-way. 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Screen reference 
1000 Trunk Group 
17
ceases after the far-end sends answer supervision. If the timer expires, the switch 
acts as if it had received answer supervision. On senderized operation, the timer 
begins after the last digit collected is sent by the switch.
NOTE:
This field’s setting does not override answer supervision sent from the 
network or from DS1 port circuit timers. To control answer supervision sent 
by DS1 firmware, set the Outgoing End of Dial (sec) field on the 
Administrable Timers page of the trunk group screen. 
Receive Answer Supervision
Use this field to specify whether the network provides answer supervision for a 
trunk group. 
For Outbound Call Management applications, set this field to 
y for trunks 
supporting network answer supervision. For trunks that do not receive a real 
answer, this field determines when the CallVisor Adjunct-Switch Application 
Interface (ASAI) connect event is sent.
NOTE:
When you set this field to y, the Outgoing End of Dial (sec) field is not 
displayed. The firmware timeout on circuit packs controlled by the Outgoing 
End of Dial (sec) field is automatically set to 
0.
Field descriptions for page 2
The figure below shows a common configuration for page 2 of the Trunk Group 
screen when the Group Type field is 
co. This screen is only an example, and the 
fields shown below may change or disappear according to specific field settings.
Valid entries Usage
0
 to 250Enter the number of seconds you want the switch to wait before 
it acts as though answer supervision has been received from the 
far-end. Set this field to 
0 if Receive Answer Supervision is y.
Valid entries Usage
y
Enter y if the network provides answer supervision. Set the 
Answer Supervision Timeout field to 
0.
n 
Enter n if the network does not provide answer supervision, 
and set the Answer Supervision Timeout field. Also enter 
n for 
incoming trunk groups. 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Screen reference 
1001 Trunk Group 
17
Screen 211. CO Trunk Group
!CAUTION:
Customers: Do not change fields on this page without assistance from 
Lucent Technologies or your network service provider.
ACA Assignment 
Measured
Indicates if the system will transmit data for this trunk group to the Call 
Management System (CMS). You cannot use 
internal and both unless either the 
BCMS (Basic) or the VuStats field is 
y on the System-Parameters 
Valid entries Usage
y/n
Enter y if you want Automatic Circuit Assurance (ACA) 
measurements to be taken for this trunk group. If 
y is entered, 
complete the Long Holding Time, Short Holding Time, and 
Short Holding Threshold fields.
add trunk-group next Page 2 of x
TRUNK FEATURES
         ACA Assignment? _ Measured: ____
Maintenance Tests? _
Data Restriction? _
  Abandoned Call Search? _
  Suppress # Outpulsing? _
Charge Conversion: _____
Decimal Point: ______
Currency Symbol: ___
Charge Type: _______ Receive Analog Incoming Call ID: ________
Per Call CPN Blocking Code: ___
Per Call CPN Unblocking Code: ___
MF Tariff Free? _
Outgoing ANI: _______________ 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Screen reference 
1002 Trunk Group 
17
Customer-Options screen. If the ATM field is set to y on the System-Parameters 
Customer-Option screen, this field accepts only 
internal or none. If this field 
contains a value other than 
internal or none when ATM is y, none appears.
Long Holding Time (hours)
This field appears only when the ACA Assignment field is 
y.
Internal Alert
Maintenance Tests
Short Holding Time (seconds)
This field appears when the ACA Assignment field is 
y.
Valid entries Usage
internal
Enter internal if the data can be sent to the Basic Call 
Management System (BCMS), the VuStats data display, or 
both.
externalEnter external to send the data to the CMS.
bothEnter both to collect data internally and to send it to the CMS.
none Enter none if trunk group measurement reports are not 
required.
Valid entries Usage
0
 to 10Enter the length of time (in hours) that the system will consider 
as being a long holding time. If you enter 
0, the system will not 
consider long holding calls.
Valid entries Usage
y/n 
Enter y if internal ringing and coverage will be used for 
incoming calls.
Valid entries Usage
y/n 
Enter y if hourly maintenance tests will be made on this trunk 
group. Your entry is not saved when the screen is submitted 
unless one or more trunk members are administered.
Valid entries Usage
0
 to 160Enter the length of time (in seconds) that the system considers 
as being a short holding time. If 
0 is entered, the system will 
not consider short holding calls.  
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Screen reference 
1003 Trunk Group 
17
Data Restriction
Short Holding Threshold
This field appears when the ACA Assignment field is 
y.
Glare Handling
This field determines what the switch will do when glare occurs. This field 
appears when the Direction field is 
two-way and the outgoing side of the Trunk 
Type field is either 
…/wink or …/delay.
If you enter 
control or backoff, and ports for the trunk group are not capable of 
detecting glare, warnings are generated. The following circuit packs can detect 
glare: TN767 (all releases), TN760C (or later releases), and TN464C (or later 
releases).
Abandoned Call Search
Use this field when the Trunk Type field is ground-start. Abandoned Call Search 
is designed to work with analog ground-start CO trunks that do not provide 
disconnect supervision. Your central office must support Abandoned Call Search 
for the feature to work properly. If your central office provides disconnect 
supervision, you do not need to use the Abandoned Call Search feature. 
Valid entries Usage
y/n 
Enter y to prevent features from generating tones on a data 
call that would cause erroneous data transmission.
Valid entries Usage
0
 to 30Enter the number of times the system will record a short 
holding call before alerting an attendant to the possibility of a 
faulty trunk. 
Valid entries Usage
control
Your switch will seize the trunk and proceed with call setup. 
The other switch will find another trunk.
backoffThe other switch will seize the trunk proceed with call setup. 
Your switch will find another trunk.
none 
Valid entries Usage
y/n 
Enter y if this trunk group will conduct an Abandoned Call 
Search to identify ghost calls. 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Screen reference 
1004 Trunk Group 
17
Used for DCS
NOTE:
This field cannot be activated if the trunk group number is greater than 255 
or if the Trunk Access code is more than 3-digits long.
If this field is 
y, you can administer ISDN-BRI trunk groups unless the DCS 
Signaling field is 
d-chan. In that case, remove the BRI trunks or set the DCS 
Signaling field to 
bx.25 before submitting the screen.
PBX ID
This field, which appears when the Used for DCS field is 
y, identifies the remote 
switch in the network with which the trunk will communicate on a DCS signaling 
link.
Suppress # Outpulsing
Seize When Maintenance Busy
This field only affects ports on TN760C (or later release), TN767, and TN464C 
(or later release) circuit packs. It indicates whether this switch generates an 
outgoing seizure when a trunk in this trunk group is maintenance busied and 
whether the far-end switch is administered to do likewise. This supports the 
Electronic Tandem Network Busyout feature, which is intended to prevent a 
far-end switch from reporting problems with a trunk that has been removed from 
service on your switch. This field’s setting does not affect the behavior of the 
far-end switch; it controls the behavior of this switch and defines the expected 
far-end behavior.
Valid entries Usage
y/n 
Enter y if this trunk group will send and receive messages on a 
DCS signaling link.
Valid entries Usage
1
 to 63Enter the ID of the switch at the other end of this trunk.
Valid entries Usage
y/n 
Enter y if end-to-end signaling begins with (and includes) “#”. 
The final “#” is suppressed in cases where the system would 
normally outpulse it. This field should be 
y when the Central 
Office (for example, rotary) or any other facility treats “#” as 
an error. 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Screen reference 
1005 Trunk Group 
17
For DIOD trunks using TN464F (or later release) or TN2464, displays only when 
the Group Type field is 
diod and the Trunk Signaling Type field is pulsed, cont, 
or 
dis.
If a switch generates an outgoing seizure when a trunk is busied out, the seizure 
will probably cause alarms at the far-end switch, perhaps leading to a far-end 
maintenance busy out, unless the far-end switch is administered to expect this 
behavior.
If the administered value of this field is either 
far-end or both-ends, any 
abnormally long incoming seizure (including failure to drop from a completed 
call) is assumed to be the result of a far-end maintenance busy condition. Note 
that this assumption may be incorrect, since the abnormally long seizure may 
actually be due to failure of the trunk circuit. Regardless of the cause of the 
abnormally long seizure, your switch does the following things:
1. Generates a warning alarm indicating that the trunk is assumed to be 
maintenance busy at the far-end
2. Removes the trunk from service
3. Keeps the trunk out of service until a far-end disconnect is received
Allowable values depend on the entry in the Direction field: check the online help 
in the switch administration software.
Shuttle
This field appears when the Country field is 
15 and the Outgoing Dial Type field 
is
 rotary. It can be administered on TN464D (or later release) or TN2199 circuit 
packs.
Valid entries Usage
near-end
Enter near-end if this switch generates an outgoing seizure 
when a trunk is maintenance busied but the far-end switch 
does not. The seizure is maintained until the maintenance 
busyout is released.
far-endEnter far-end if the far-end switch generates an outgoing 
seizure when a trunk is maintenance busied but this switch 
does not.
both-endsEnter both-ends if both this switch and the far-end switch 
generate an outgoing seizure when a trunk is maintenance 
busied.
Valid entries Usage
y/n 
Enter y to enable MF shuttle signaling. 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Screen reference 
1006 Trunk Group 
17
Charge Conversion
DEFINITY ECS multiplies the number of charge units by the value of this field 
and displays it as a currency amount. If there is no value in this field, DEFINITY 
ECS displays the number of charge units without converting it to currency. This 
field appears for CO, DIOD, FX, and WATS trunk groups when the Direction field 
is 
outgoing or two-way. For ISDN trunk groups, it appears when the Charge 
Advice field is not 
none.
Decimal Point
This field appears for CO, DIOD, FX, and WATS trunk groups when the Direction 
field is 
outgoing or two-way. For ISDN trunk groups, it appears when the Charge 
Advice field is not 
none.
Start B Signal
This field appears when the Country field is 
15 and the Shuttle field is y. Enter 1–3 
to indicate which B-signal should be used to start a call. The value administered in 
this field must be coordinated with your central office. Refer to ‘‘
Start Position’’ 
on page 1007.
Valid entries Usage
1
 to 64,500Enter the value of a charge unit in terms of the currency you 
use.
Valid entries Usage
comma
Chose the appropriate representation for a decimal point as it 
will appear on phone displays. Entering comma or period in 
this field divides the charge value by 100.
period
none
 
Valid entries Usage
1
  Start calls with signal B1 (first digit)
2Start calls with signal B2 (next digit)
3Start calls with signal B3 (previous digit)