Lucent Technologies Ds1/Cept1/Isdn Pri Reference Manual

							DEFINITY Communications System Generic 2.2 and Generic 3 V2 
DS1/CEPT1/ISDN PRI Reference  
555-025-107  Issue 1
July 1993
Layers 2 and 3 
Page 5-55 ISDN PRI Layer 3 
5
nIf the G3V2 is orig inating  an NCA-TSC, the TSC is sent out the D c hannel 
of the sig naling  g roup  form in whic h it is ad ministered . No routing  is 
performed based on the called party digits.
nAn inc oming  NCA-TSC is treated  b y the inc oming  c all hand ling  table of 
the trunk g roup  ind ic ated  in the Trunk Group for NCA-TSC
 field  in the 
signaling group form.
nAn inc oming  NCA-TSC that is to b e tand emed  to an outg oing  NCA-TSC 
works as follows:
— The inc oming  NCA-TSC is treated  b y the inc oming  c all hand ling  
table as described above.
— The resulting  d ig its from the c alled  p arty numb er are analyzed .
— Route selec tion is p erformed  just as if this were a B c hannel c all 
and  an outg oing  trunk g roup  is c hosen (even thoug h the NCA-TSC 
is not sent on a trunk g roup ).
— The D c hannel for the outg oing  NCA-TSC is taken from the 
ad ministration in the NCA-TSC Signaling Group
 field  in the 
trunk g roup  form for the c hosen trunk g roup .
Temp orary signaling  c onnec tions are not sup p orted  in G3V2 unless the c ountry 
p rotoc ol is 1
 (U.S.) in the DS1 c irc uit p ac k form. In this c ase, TSCs c an b e used  
in c onnec tions to the p ub lic  network in the U.S. or in private networks anywhere.
Call by Call Service Selection in G2.2 Systems
The method  c ommonly used  for c all-b y-c all trunk g roup  ad ministration in G2.2 is 
to use trunk type 41 for all c all-b y-c all trunk g roup s. If you make sure your d ial 
p lan is c onsistent with this trunk typ e, this trunk typ e will work and  it will also 
make it easy to migrate from non-ISDN trunks to ISDN trunks. 
Call by Call Service Selection in G3V2 Systems
To imp lement CBC on a trunk g roup , you must ad minister the Group Type
 field  
on the trunk group form as isdn-pr
i and  the Service Type
 field  as cbc
. If cbc
 is 
assig ned  in the trunk g roup  form, the Usage Alloc
 field  is d isp layed . Setting  
this field to y
 c auses two new sc reens to ap p ear on p ag es three and  four of the 
trunk g roup  form. These forms are used  to ad minister the usag e alloc ation p lan 
(UAP). The p urp ose of the UAP is to allow you to have c ontrol over the alloc ation 
of trunks to network servic es without inc urring  the c osts c harg ed  b y the network 
servic es for trunk/servic e re-arrangements. The UAP allows you to g ain the 
func tionality of static  trunk g roup s and  c all-by-c all trunk g roup s on c all-b y-c all 
trunk g roup s.
NOTE:
The usag e alloc ation p lan ap p lies only to c alls having  NSF values. It will not 
work for DID c alls, for examp le. 
						

							DEFINITY Communications System Generic 2.2 and Generic 3 V2 
DS1/CEPT1/ISDN PRI Reference  
555-025-107  Issue 1
July 1993
Layers 2 and 3 
Page 5-56 ISDN PRI Layer 3 
5
The following  list d esc rib es how the UAP works:
nIf the UAP sc reens are left b lank, a c all routed  to a CBC trunk g roup  will 
use that trunk g roup  if it is availab le, with no p referenc e g iven to the 
p artic ular servic e typ e of the c all. In this c ase, the total numb er of 
memb ers in the CBC trunk g roup  c onstitutes the CBC p ool.
nThe CBC trunk g roup  usag e alloc ation form (p ag e 3 of the trunk g roup  
form) is used  to set the minimum and  maximum numb er of c hannels 
(trunks or memb ers) to b e used  for eac h servic e typ e for up  to three 
different plans. For example, for Megacom calls made during the times 
p lan 1 is in effec t, you c an set the Min# Chan
 and  Max# Chan
 field s for 
all the servic e types in that p lan suc h that a g iven usag e for the Meg ac om 
c alls can b e sp ecified .
— The Min# Chan
 field  spec ifies the minimum numb er of trunks that 
will always b e availab le for a g iven servic e. The value in the Min# 
Chan
 field  is equivalent to having  that numb er of d ed ic ated  trunks 
for that servic e. For examp le, if the MEGACOM row has a 3 
entered  
in the Min# Chan
 field , it is equivalent to having  three static  trunks 
d edic ated  to MEGACOM servic e.
— The Max# Chan
 field sp ec ifies the maximum numb er of trunks that 
c an b e used  b y a sp ec ific  servic e at any g iven time.
— The p ool of trunks availab le for c all-b y-c all servic e selec tion, the 
CBC p ool, is eq uivalent to the total numb er of trunks in the g roup  
minus the sum of all the Min# Chans in the g roup . For example, if 
Meg ac om has three trunks reserved  in the Min# Chan
 field  and  
three trunks are b usy with Meg ac om c alls, the next Megac om c all 
will overflow to an availab le trunk in the CBC p ool.
— For any g iven servic e (any g iven row in the tab le) the Max# Chan
 
minus the Min# Chan
 must b e less than or equal to the total 
number of trunks in the group minus the sum of all the Min# Chan
 
in the group.
To tune the usag e alloc ation p lan suc h that you ac hieve the d esired  trunk 
usage for each service, you can follow these steps:
1. Ob serve the hourly CBC traffic  measurements for eac h servic e 
d uring  the times the p lan is in effec t.
2. If the p erformanc e is not what is d esired  (too many Meg ac om c alls 
are b eing  b loc ked , for examp le), ad just the Min# Chan
 and  Max # 
Chan
 field s until the d esired  p erformanc e is ac hieved .
nPage four of the trunk group  form is the CBC trunk g roup  usag e alloc ation 
p lan assignment sc hed ule. This form is used  to sc hed ule the (up  to) three 
p ossib le p lans d efined  on p ag e three of the form. Two p ossib ilities, fixed  
and  sc heduled p lans, exist as follows:
— A fixed  p lan means that the p lan ad ministered  on p ag e three of the 
trunk group form corresponding to the number in the Allocation 
Plan Number
 field  on this form is always in effec t, i.e., d oes not  
						

							DEFINITY Communications System Generic 2.2 and Generic 3 V2 
DS1/CEPT1/ISDN PRI Reference  
555-025-107  Issue 1
July 1993
Layers 2 and 3 
Page 5-57 ISDN PRI Layer 3 
5
c hang e d epend ing  on time of d ay or d ay of week. For examp le, if y
 
is assig ned  in the Fixed
 field  and  if 1
 is assig ned in the 
Allocation Plan Number
 field , then usag e alloc ation p lan 1, 
ad ministered  in the first c olumn on p ag e three, will b e in effec t until 
the sched ule is re-ad ministered .
— A sc hed uled  p lan means that the p lans d efined  on p ag e three are 
in effec t at the times assig ned  on p ag e four. The Scheduled
 field  
on page four must be set to y
 for a sc hed uled  p lan. In this c ase, the 
p lan assig ned  in a Plan #
 field  stays in effec t from the time-of-d ay 
and day-of-week indicated in the Act Time
 (ac tivation time) field 
until the next oc c urrenc e of a d ifferent p lan is enc ountered . The 
Allocation Plan #
 field is ig nored  if Scheduled
 is marked  as 
y
.
— You c an c hang e b etween fixed  and  sc heduled plans without 
re-ad ministering  the sc reens b ec ause the translations are saved  
and  the sc heduling  is ig nored  if a fixed  p lan is in effec t.
Incoming Call Handling Table in G3V2
The inc oming  c all hand ling  tab le ad ministered  on p ag e two of the ISDN PRI trunk 
g roup  form is used  to treat inc oming c alls, on a p er-c all b asis, in sp ec ial ways. 
For example, you c an insert d ig its, d elete inc oming  d ig its, and  infer ac c ess 
c od es. Althoug h not restric ted  to CBC trunk g roups, the inc oming  c all hand ling  
tab le has imp ortant ap p lic ations with CBC when the G3V2 is c onnec ted  to a 
p ublic  network switc h using  several d ifferent servic es. The tab le c onsists of up  to 
12 rows of seven c olumns per row. The first three c olumns c onstitute a key that 
tog ether selec t whic h row or uniq ue treatment should  ap p ly for an inc oming  c all 
on the g roup . The remaining  four c olumns sp ec ify the treatment to b e provid ed  
for a c all that matc hes the key.
The first c olumn or field  in the key is the Service/Feature
 field . If an inc oming  
c all is for a servic e listed  in a row in the inc oming  c all hand ling  tab le, then that 
row may sp ec ify the treatment for the c all, d ep ending  on the other two c olumns 
of the key. The Called Len
 field  is used  to c ontinue the row d etermination. If the 
numb er of d ig its rec eived  with the inc oming  c all matc h the numb er of dig its in the 
Called Len
 field for c alls to the matc hed  servic e, then this row may ap ply. If no 
other row also c ontains a matc hing  servic e and  c alled  leng th, then this row d oes 
ap ply. If another row d oes exist with the same servic e and  numb er leng th, then 
the Called Number
 field will b e used  to c ontinue the row d etermination. If the 
lead ing  d igits rec eived with the inc oming  c all matc h the d ig its sp ec ified  in the 
Called Number
 field, then this row ap p lies to the c all. Therefore, with this tab le, 
a uniq ue treatment c an b e given to any inc oming  c all, even if these c alls are to 
the same servic e or have the same numb er of d ig its. The remaining  four field s 
sp ec ify the uniq ue treatment for the c all onc e the row has b een d etermined . 
Tog ether, the Del
 and  Insert
 field s c an b e used  to manip ulate the inc oming 
numb er that will b e used  to route the c all. The Per Call CPN/BN
 field can be 
used  to req uest CPN/BN only for sp ec ific  c alls inc oming  on the g roup  from a  
						

							DEFINITY Communications System Generic 2.2 and Generic 3 V2 
DS1/CEPT1/ISDN PRI Reference  
555-025-107  Issue 1
July 1993
Layers 2 and 3 
Page 5-58 ISDN PRI Layer 3 
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4ESS switch. The Night Serv
 field  is used  to have c alls of d ifferent typ es 
routed  to d ifferent nig ht d estinations when night servic e is in effec t.
This tab le is esp ec ially suited  to Meg ac om 800 servic e with the DNIS feature, 
allowing  you to treat d ifferent 800 c alls in sp ec ial ways b ased  on the d ialed  
numb er. Another ap p lic ation is to ad d  d ig its to an inc oming  SDN c all suc h that 
the AAR ac c ess c od e is p rep end ed  to the inc oming  d ig its for routing  throug h an 
ETN network. 
NOTE:
If the servic e type of the trunk g roup is tie or tand em, c alls with any NSF on 
the trunk g roup  will b e allowed  to c omplete, whether the inc oming  c all 
hand ling  tab le is ad ministered  or not. For examp le, if the servic e type is 
tand em and  the inc oming  c all hand ling  table is b lank, any SDN, Meg ac om, 
etc ., c alls will c omp lete. Thus, the inc oming  d ig its must b e the exp ec ted 
digits for routing purposes. For these calls to receive special treatment still 
req uires administering  the inc oming  c all hand ling  tab le, however.
Also, even thoug h c alls on trunk g roup s of tie and  tand em are tand emed , 
the NSFs are not tand emed  — the NSF is always d etermined  by the routing  
p attern administration. 
						

							System Administration 
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DEFINITY Communications System Generic 2.2 and Generic 3 V2 
DS1/CEPT1/ISDN PRI Reference  
555-025-107  Issue 1
July 1993
6
6System Administration
The two p revious c hap ters d esc rib e how the DEFINITY systems imp lement DS1 
and  CEPT1 c ap ab ilities for narrowband  switc hing  that are d efined in external 
stand ard s, suc h as ISDN PRI sp ec ific ations. To imp lement these stand ard  
c ap ab ilities on DEFINITY systems, however, requires ad d itional system 
ad ministration. For examp le, trunks must b e ad d ed  to trunk g roup s and  routes 
must b e c hosen for calls over d ig ital trunks. This chap ter d escrib es the system 
ad ministration req uired  to imp lement DS1 and  CEPT1 narrowb and  switc hing 
c ap ab ilities on DEFINITY systems.
For tec hnic al information on wid eb and  switc hing  in DEFINITY systems, refer to 
AT&T DEFINITY Wid eband  Tec hnic al Referenc e, 555-230-230.
G3V2 Administration 
The following  list shows the forms that must b e ad ministered  for most d ig ital trunk 
ap plic ations in G3iV2 systems. The g eneral ap plic ation (either b it oriented  
sig naling  or ISDN PRI sig naling ) ap p ears in p arentheses to the rig ht of eac h 
entry. For examp le, the system p arameters-c ustomer op tions form is req uired  
only for ISDN PRI trunks.
1.System Parameters—Customer Options (ISDN PRI)
2. System Parameters—Features (ISDN PRI)
3. System Parameters—Maintenanc e (ISDN PRI)
4. Data Mod ule (b it-oriented , ISDN PRI)
5. Dial Plan Rec ord  (bit-oriented , ISDN PRI)
6. DS-1 Circ uit Pac k (b it-oriented , ISDN PRI)
7. Sig naling Group  (ISDN PRI) 
						

							DEFINITY Communications System Generic 2.2 and Generic 3 V2 
DS1/CEPT1/ISDN PRI Reference  
555-025-107  Issue 1
July 1993
System Administration 
Page 6-2 G3V2 Administration 
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8. Sync hronization Plan (b it-oriented , ISDN PRI)
9. Communic ation Interfac e Links (ISDN PRI)
10. Communic ation Proc essor Channel Assig nment (ISDN PRI)
11. Communic ation Interfac e Links. Enab le the interfac e links. (ISDN PRI)
12. Trunk Group  (bit-oriented , ISDN PRI)
13. Network Fac ilities (ISDN PRI)
14. Routing  Pattern (b it-oriented , ISDN PRI)
15. CPN Prefix Tab le (ISDN PRI)
16. Hunt Group  (ISDN PRI)
17. Terminating  Extension Group  (ISDN PRI)
The following  list shows the forms that must b e ad ministered  for most d ig ital trunk 
ap plic ations in G3rV2:
1.System Parameters—Customer Options (ISDN PRI)
2. System Parameters—Features (ISDN PRI)
3. System Parameters—Maintenanc e (ISDN PRI)
4. Data Mod ule (b it-oriented )
5. Dial Plan Rec ord  (bit-oriented , ISDN PRI)
6. DS-1 Circ uit Pac k (b it-oriented , ISDN PRI)
7. Sig naling Group  (ISDN PRI)
8. Sync hronization Plan (b it-oriented , ISDN PRI)
9. Trunk Group  (bit-oriented , ISDN PRI)
10. Network Fac ilities (ISDN PRI)
11. Routing  Pattern (b it-oriented , ISDN PRI)
12. CPN Prefix Tab le (ISDN PRI)
13. Hunt Group  (ISDN PRI)
14. Terminating  Extension Group  (ISDN PRI)
System Parameters—Customer Options Form
The ad ministration for this form is p erformed  remotely b y the Tec hnic al Sup p ort 
Center (TSC). It ac tivates the op tional features of the G3V2 systems.
The following  list d esc rib es the DS1/CEPT1/ISDN PRI-related  ad ministration 
setting s for the field s of this form: 
						

							DEFINITY Communications System Generic 2.2 and Generic 3 V2 
DS1/CEPT1/ISDN PRI Reference  
555-025-107  Issue 1
July 1993
System Administration 
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Feature-Related System Parameters Form Settings
The only ISDN PRI-related  field  in this form is the DID/Tie/ISDN Intercept 
Treatment
 field . You c an op tionally enter the extension of the rec ord ed  
announc ement you want to use for interc ept treatment for invalid  ISDN PRI c alls. 
This field  d efaults to 0
 to g o to the attend ant.
Maintenance-Related System Parameters 
Form Settings
This form is p rimarily for use b y maintenanc e p ersonnel. The only ISDN 
PRI-sp ec ific  field  in this form is the ISDN Test Call Extension
 field . You 
should  enter the numb er that the far end  should c all when it p erforms an ISDN 
test. At p resent, it is not p ossib le for p ub lic  network switc hes to c all this numb er. 
In these c ases the only way to p erform this test is to have a far-end  end p oint c all 
this extension. This is p ossib le if you are using  ACCUNET Switc hed  Dig ital 
Servic es or SDN to ac c ess the far end, for examp le.
Data Module Form Settings
Any d ata end p oints using  DCP d ata mod ules (MPDMs) for c alls routed  to ISDN 
PRI trunk g roup s must have the ITC
 field  ad ministered . This field  c an b e either 
restricted
 or unrestricted
. The setting  here is c omp ared  with the ITC on the 
trunk g roup  p referenc e to d etermine if the c all c an use that trunk group .
NOTE:
This form only ap p lies to G3iV2 systems.
In ad d ition to any external d ata mod ules used to make c alls, you must also 
administer a special type of data module called the processor interface data 
mod ule. The G3iV2 interfac e to ISDN PRI requires a sync hronous/async hronous 
p roc essor interfac e c irc uit p ac k (TN765). Eac h TN765 has four p orts (links) for 
sup p orting BX.25 and /or ISDN ap plic ations. Up  to two TN765 (8 links) are 
p ossib le in a multip le c arrier c ab inet or one (4 links) in a sing le c arrier c ab inet. 
The TN765 has d ata mod ules (PDMs) integ rated  into its p orts. These proc essor  ARS ARS is req uired for ISDN PRI c onnec tions to p ub lic  network 
switc hes.
ARS 
PartitioningThis field  is fac tory-set to y
 if ARS is ord ered .
ISDN-PRIy
 here turns on ISDN PRI.
Wideband 
Sw i t c h in gA y
 here enab les wid eb and  switc hing . For tec hnic al 
information on wid eb and  switc hing in DEFINITY systems, 
refer to 
AT&T DEFINITY Wid eb and  Tec hnic al Referenc e, 
issue 1, 555-230-230. 
						

							DEFINITY Communications System Generic 2.2 and Generic 3 V2 
DS1/CEPT1/ISDN PRI Reference  
555-025-107  Issue 1
July 1993
System Administration 
Page 6-4 G3V2 Administration 
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interfac e d ata modules must have extensions assig ned  to them just as if they 
were external MPDMs.
This form is used  to ad minister these extensions.
The following  list d esc rib es the ad ministration setting s for this form:
DS1 Circuit Pack Form Settings
The following  list d esc rib es the ad ministration setting s for this form. Data 
Ex t e n si o nYou must assig n a d ata mod ule extension to the p hysic al 
c hannel to b e used  for the ISDN PRI link. Any valid  extension 
c an b e used  here. Use the system c ommand  add data-module
 
extension.
Typ e Ente r procr-infc
.
Ph ys ic a l 
ChannelEnter the p hysic al c hannel numb er in the rang e 01 - 08, 
c orresp ond ing  to the p orts on the PI board s to whic h you 
assig ned the d ata extension.
Name This field  is op tional. You should  enter something  ind ic ating  
what is on the far end  of this link.
Location Display-only. This is the slot loc ation of the DS1/CEPT1 circuit 
pack.
Name Enter a name or desc rip tion, up  to 15 c harac ters, to d esc rib e 
the DS1/CEPT1 board . A c ommon c onvention is to use the 
far-end  destination (SDN-1, for examp le).
Bit Rate G3V2 only
Va l u e s :
1.544 (d efault)
2.048
Re f e re n c e :
Se c t io n  ‘‘Bit Rate’’ in Chap ter 4, ‘‘Physic al Layer’’.
If the b oard  c od e is a TN722, TN722B or a TN767 this field  is 
d isp lay-only with a value of 1.544. If the board  c od e is a 
TN464B this field  is display-only with a value of 2.048. If the 
b oard  c od e is a TN464C or later release, this field is 
ad ministrab le for the value of 1.544 or 2.048 with a d efault of 
1.544. If 2.048 is c hosen, the Framing Mode
, Line 
Compensation
 and  DMI-BOS
 field s will d isap pear. In 2.048 
the Framing Mode
 will b e multi-framing  and  will not b e 
ad ministrab le. The Line Compensation
 and DMI-BOS
 fields 
are not ap p lic able. 
						

							DEFINITY Communications System Generic 2.2 and Generic 3 V2 
DS1/CEPT1/ISDN PRI Reference  
555-025-107  Issue 1
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Line Cod ing Va l u e s :
b8zs
hd b 3 (G3V2 only)
none (G3V2 only)
zcs (d efault)
Re f e re n c e :
Se c t io n  Line Cod ing in Chap ter 4, Physical Layer.
For systems in the U.S., unless you have req uested  
unrestric ted  fac ilities end -to-end , you should  assig n zcs
 here. If 
you are g uaranteed  unrestric ted  fac ilities end -to-end , then you 
should  assig n b8zs
 or hdb3
 here. ZCS causes an inverted D 
c hannel. B8ZS and  HDB3 result in a non-inverted  D c hannel. 
The value none
 c an also b e used  to sig nify AMI-only line 
c oding , whic h d oes not p erform 1s d ensity c onformanc e.
Line 
Comp ensatio
n
Va l u e s :
A numb er from 1 to 5
Re f e re n c e :
Se c t io n  ‘‘Line Comp ensation’’ in Chap ter 4, ‘‘Physical Layer’’.
Selec t one of the following  c omp ensation values c orresp ond ing  
to the length of the c ab le from the DS1/CEPT1 b oard  to the 
CSU (or other DSX-1 c ross c onnec t).
Compensation      Length (feet)
     1            000 - 133
     2            133 - 266
     3            266 - 399
     4            399 - 533
     5            533 - 655
This field  d oes not ap p ear if the b it rate is 2.048.
Fra mi ng  
Mode
Va l u e s :
d4
esf (d efault)
Re f e re n c e :
Se c t io n  ‘‘Framing  Format’’ in Chap ter 4, ‘‘Physic al Layer’’.
Framing  format must b e the same on eac h end  of the link. In the 
U.S., ESF is rec ommend ed  with all ISDN PRI ap p lic ations. You 
must sp ec ify ESF framing  on the servic e ord er form. You must 
also op tion ESF on the CSU. The other p ossib le op tion is D4 
framing . If D4 framing  is used, the CSU must also use 
D4-framing  for that ISDN PRI interfac e. If the b it rate is 2.048 
mbps, this field does not appear. 
						

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DS1/CEPT1/ISDN PRI Reference  
555-025-107  Issue 1
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Sig naling 
ModeVa l u e s :
CAS (G3V2 only)
c ommon-c han (d efault)
isd n-ext (G3V2 only)
isd n-p ri
robbed-bit
Re f e re n c e :
Se c t io n  ‘‘Channel Struc ture and  Sig naling ’’ in Chap ter 4, 
‘‘Physic al Layer’’. 
Se c t io n  ‘‘Fac ility-Assoc iated  and  Non-Fac ility Assoc iated  
Signaling’’ in Chap ter 5, ‘‘Layers 2 and  3’’.
This p arameter selec ts the sig naling  mod e. It must matc h the 
sig naling  mode in use at the other end  of the link. If there is a 
free c hoic e at b oth end s, c ommon-c han mod e has the 
ad vantag e that it is unrestric ted , i.e., may b e used  for voic e or 
64-kb  d ata, inc lud ing AVD and  DMI servic es, whereas 
rob b ed-b it mode is restric ted to voic e or 56 kb p s d ata. On the 
other hand , robb ed -b it mod e d oes p rovid e an extra trunk.
The c hoic e of CAS
 selec ts a signaling  mod e c onsistent with Tie 
or CO trunk protoc ol (d ep end ing  on Interc onnec t value) 
sup p orted  on the 2.048 mb p s interfac e. This req uires the c irc uit 
p ac k to b e a TN464B or a TN464C or later release DS1/CEPT1 
interface. This choice will cause the Country Protocol
, 
Interconnect
 and  CRC
 field s to app ear.
The c hoic e of the common-chan
 parameter selects a sig naling  
mod e used  for 24 c hannel tie trunks.