Lucent Technologies DEFINITY Communications System Generic 2.2 And Generic 3 V2 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
G2 ISDN PRI Implementation in Administration 
Page A-5  
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1. If an extension user orig inates a c all over an ISDN-PRI trunk, the name 
assig ned  the user in p roc ed ure 012 is used  for the Disp lay IE.
2. On a c all tand eming  throug h the switc h where b oth the c alling  and  c alled  
trunks are ISDN-PRI, the d isp lay IE rec eived  over one trunk (if there is one) 
is tand emed  over the other trunk. That is, on this typ e of c all a d isp lay IE is 
never c reated  by the switc h.
3. On an interworked tand em c all throug h the switc h (that is, one trunk 
ISDN-PRI and  one trunk not ISDN-PRI), the d isp lay IE is b uilt from the 
name assoc iated  with trunk g roup  of the non-ISDN-PRI trunk.
4. If an attend ant orig inates or rec eives a c all over an ISDN-PRI fac ility, the 
string  Woperator
 is used  to b uild  the d isp lay IE.
Procedure 100 Word 1
Field  6 of this word is used  to d efine the trunk typ e of a spec ific  trunk g roup . 
For ISDN trunk g roup s as well as other typ es of trunk group s, the entered  type 
d efines feature op eration for the trunk g roup . For examp le, if a trunk g roup is 
assig ned  the typ e of 19, inc oming  c alls over this trunk g roup  are routed  to the 
attendant c onsole. On Direc t Inward  Dial (DID) trunk-typ e g roup s, the switc h 
exp ec ts station-numb er d ig its on all inc oming trunks; on tie-trunk-typ e g roup s, 
the switc h c an hand le either station-numb er d ig its or network numb ers.
For an ISDN trunk g roup , a d ynamic  trunk typ e (120) c an b e assig ned  to the 
group. This trunk type allows the group to process calls with a different trunk type 
on a c all-b y-c all (CBC) b asis. For examp le, one inc oming c all over the g roup  
may expec t station number digits (such as a MEGACOM call), while the next c all 
over the g roup  may exp ec t a network numb er (suc h as a Software Defined  
Network c all, also c alled  a SDN c all).
This trunk typ e allows flexib ility in p roc essing  c alls as op posed  to a static  trunk 
typ e. Both an Automatic  Alternate Routing /Automatic  Route Selec tion (AAR/ARS) 
prefix digit (procedure 103) and a DID additional digit (procedure 101) can be 
ad ministered  for ISDN d ynamic  trunk g roup s. (This c annot b e d one for any other 
typ e of trunk g roup .) The d ynamic  trunk typ e is rec ommend ed  in CBC servic e.
The following  rules are used to d etermine how to p roc ess an inc oming  c all over a 
trunk g roup  whose typ e is ISDN d ynamic :
1. If a network-sp ec ific  fac ility (NSF) IE is p resent in the setup  messag e and  
the feature/servic e ind ic ation is service
, then:
nIf the servic e ind ic ated  is SDN, electronic tandem network (ETN)
, 
or private line
, p roc ess the c all like a c all with a trunk typ e of 46.
nOtherwise, proc ess the c all like a c all with a trunk typ e of 31. 
						

							DEFINITY Communications System Generic 2.2 and Generic 3 V2 
DS1/CEPT1/ISDN PRI Reference  
555-025-107  Issue 1
July 1993
G2 ISDN PRI Implementation in Administration 
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2. If either an NSF IE is p resent in the setup  messag e and  the feature or 
servic e ind ic ation is feature
, or there is no NSF at all, the following rules 
are used  to d etermine trunk typ e (these rules are based  on the interfac e 
end p oint translated for the ap p lic ab le c hannel in field  10 of p roc ed ure 
116):
nIf the end p oint sp ec ified  is PBX
, p roc ess the c all with a trunk typ e 
of 41.
nIf the end p oint sp ec ified  is host computer
, p roc ess the c all with a 
trunk typ e of 108.
nIf the end p oint sp ec ified  is network
, p roc ess the c all with a trunk 
typ e of 31.
Procedure 100 Word 2
Field  1 of this word sp ec ifies the trunk g roup  numb er and  field  2 sp ec ifies a 
BCCOS numb er for this trunk group .
For interworked  tand em c alls throug h the switc h where the c alling trunk is not 
ISDN-PRI trunk and  the c alled  trunk is, the BCCOS of the non-ISDN-PRI trunk is 
used  to d efine a BC for the outg oing  setup  messag e over the ISDN-PRI trunk. 
(See the ‘‘Proc ed ure 000 Word  3’’
 sec tion in this ap p end ix for enc od ing s of the 
BC IE.)
This COS also d efines other routing  p arameters. These p arameters are 
d isc ussed in the ‘‘Proc ed ure 309 Word  5’’
 and  ‘‘Proc ed ure 321 Word  5’’ sec tions 
of this ap p end ix.
Procedure 100 Word 3
Field  2 Used  to assig n a trunk g roup  as ISDN-PRI that has ISDN-PRI 
sig naling  (typ e 20). This c auses ISDN-PRI messag e-oriented  
sig naling  (MOS) to oc c ur for the trunk g roup .
Field  3 Not ap p lic ab le for ISDN-PRI trunk g roup s. ISDN-PRI 
spec ific ations exp lain the p roc ed ures to b e used  when g lare is 
enc ountered . These sp ec ific ations are imp lemented  in the 
ISDN-PRI feature c od e. 
						

							DEFINITY Communications System Generic 2.2 and Generic 3 V2 
DS1/CEPT1/ISDN PRI Reference  
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Procedure 103
Procedure 107 Word 1
This p roc ed ure is used  to assig n terminating test line telep hone numb er d ig its to 
ISDN-PRI trunk g roup s. When p lac ing  a trunk verific ation b y station (TVS) or trunk 
verific ation b y c ustomer (TVC) test c all, these d ig its are used  to b uild  the c alled  
p arty numb er IE in the setup  message for the trunk g roup  und er test. If d ig its are 
not translated  for a trunk g roup  and  a TVC/TVS c all is mad e for a c hannel in this 
trunk g roup , the resulting  c alled  p arty numb er IE will not c ontain add ress d ig its.
The following  rules are used  in b uild ing  this IE. These rules ap p ly to all typ es of 
c alls mad e out of the switc h and  not just test c alls. The rules are c hec ked  b y the 
system in the ord er shown b elow. The first true rule enc ountered results in the IE 
b eing  b uilt as shown for that rule.
nFor international c alls (that is, a d ial 011
 calls)
Opcode: 7 (assuming no codeset mapping)
Numb ering  p lan id entific ation: telep hony numbering  p lan
Type of address: international number (address digit octets follow) Field  8 Used  to p revent the send ing  of various IEs over the trunk g roup  
spec ified in field  1. If the entry in this field  is 0
, there is no 
restriction on sending IEs over the trunk group.
For Generic  2, this field  allows or p revents the send ing  of the 
following  IEs:
nConnec ted  numb er
nLow-layer c omp atibility
nCalling-party number
nDisp lay
nLog ic al-link id entific ation
nTC M
nLink-layer p arameters
nPacket-layer parameters
nLook-Ahead  interflow
Field  14 This field  must b e set to1
 for all trunk g roup s whose sig naling  
typ e is DMI ISDN MOS (typ e 20). This insures that all outg oing  
address digits are collected before the switch selects an 
outg oing  ISDN-PRI trunk and  assuring  that a c orrec t c alled  
p arty numb er IE in the outg oing  setup  messag e. 
						

							DEFINITY Communications System Generic 2.2 and Generic 3 V2 
DS1/CEPT1/ISDN PRI Reference  
555-025-107  Issue 1
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nFor ARS c a ll s
Opcode: 7 (assuming no codeset mapping)
Numb ering  p lan id entific ation: telep hony numbering  p lan
Typ e of add ress: national numb er (add ress d ig it oc tets follow)
nFor c alls p lac ed over a c hannel whose interfac e end p oint in p roc ed ure 
116 sp ec ifies network
Opcode: 7 (assuming no codeset mapping)
Numb ering  p lan id entific ation: telep hony numbering  p lan
Typ e of add ress: national numb er (add ress d ig it oc tets follow)
nFor AAR c alls and  c alls p lac ed  over a c hannel whose interfac e end point in 
p roc ed ure 116 sp ec ifies either host
 or PBX
Opcode: 7 (assuming no codeset mapping)
Numb ering  p lan id entific ation: p rivate numb ering  p lan
Typ e of add ress: unknown (ad d ress d ig it oc tets follow)
Procedure 108 Word 1
This p roc ed ure is used  to assign the terminating  test-line telep hone d ig its to an 
ISDN-PRI trunk g roup .
These are the ad dress d ig its used  to b uild  the c alled  p arty number IE in the 
setup  messag e when making  a d emand test c all via p roc ed ure 648 test 3. If 
d ig its are not translated , ad d ress d ig its d o not ap p ear in the IE.
The c od ing  rules for the c alled  p arty IE g iven in the ‘‘Proc ed ure 107 Word 1’’
 
sec tion of this ap p end ix also app ly to this word .
Procedure 116 Word 1
This p roc ed ure is used  to assign ISDN-PRI B c hannels to trunk g roup s.
NOTE:
Ensure that the interfac e end p oint field is assig ned c orrec tly for eac h B 
c hannel.
Field  10 d etermines the enc od ing  of the c alled  p arty IE as disc ussed  in the 
‘‘Proc ed ure 107 Word  1’’
 sec tion of this ap p end ix. If the B c hannel is in an ISDN 
d ynamic  trunk group , this field  d etermines how an inc oming  c all over the trunk is 
processed (see the ‘‘Proc ed ure 100 Word  1’’
 sec tion earlier in this ap p end ix).
Field  11 sp ec ifies the D-c hannel g roup  assoc iated  with the c hannel. This 
information is used in c onstruc ting the c hannel-ID 
						

							DEFINITY Communications System Generic 2.2 and Generic 3 V2 
DS1/CEPT1/ISDN PRI Reference  
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Procedure 210 Word 2
Field  5 of this word is used  to assig n an NPA-NXX d esignator to an attend ant 
c onsole.
If an attend ant c onsole is not assig ned  this d esig nator, c alls orig inated  from this 
c onsole over an ISDN-PRI trunk d o not have a c alling  p arty number IE in the 
setup  messag e. Likewise, c alls terminating  to this c onsole over ISDN-PRI trunks 
d o not have c onnec ted  numb er IEs in the c onnec t messag es (see the 
‘‘Proc ed ure 354 Word  3’’
 sec tion of this ap p end ix).
Procedure 260 Word 1
This p roc ed ure is used  to assig n DS1 or ISDN c harac teristic s to physic al 
loc ations. Setting  field  14 (ap plic ation typ e) to 5
 enab les ISDN func tionality for 
the sp ecified  p hysical location.
Procedure 262 Word 1
This p roc ed ure d efines various ISDN board  p arameters. Default values are 
automatic ally assig ned  when a board  is ad d ed  in p roc ed ure 260 with an 
ap plic ation typ e of ISDN-PRI
.
Field  5 of this word sp ec ifies an interfac e typ e of network or user. For an 
ISDN-PRI p oint-to-p oint link to func tion, one end  must b e translated  as network 
and  the other end as user.
This field  also d etermines how g lare is handled  on this b oard . The following  rules 
apply to glare handling:
P
Req uests the c hannel as a p referred  c hannel (this is done in the 
c hannel-ID IE of the setup  messag e)
E
Req uests the c hannel exc lusively (this is d one in the c hannel-ID IE of the 
setup  messag e)
U
Sp ec ifies that the switc hs sid e of the interfac e is the user sid e
N
Sp ec ifies that the switc hs sid e of the interfac e is the network sid e
.IX Network sid e sp ec ific ation
X
Sp ec ifies that it is not imp ortant whic h is the network sid e or the user sid e
1
Sp ec ifies that the inc oming  c all g ets the c hannel and  outg oing  c all waits 
to b e neg otiated
2
Sp ec ifies that the outg oing  c all g ets the c hannel and  the switc h 
neg otiates the inc oming c all to another c hannel
3
Outg oing  c all g ets the c hannel and  the switc h g ives a release (REL) 
c omp lete (COM) on the inc oming c all 
						

							DEFINITY Communications System Generic 2.2 and Generic 3 V2 
DS1/CEPT1/ISDN PRI Reference  
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Generic  2 c alls req uest c hannels as p referred  exc ep t for ISDN-DCS c alls whic h 
req uests c hannels as exc lusive.
Field  6 of this word c ontrols whether level-2 and  level-3 tests may b e p erformed  
on this b oard  via p roc ed ure 648.
Field  7 of this word id entifies the terminal end p oint for an ISDN-PRI b oard  (this 
must always b e translated  as 0
).
Field s 8, 9, and 10 of this word  d efine T203, T200, and  N200 resp ec tively. By 
varying  these field s, the level-3 timer values c an b e c hang ed. N200 and T200 
affec t the T303, T305, T308, and  T313 timers ac c ord ing  to the following  equation:
(timer value) =  (N200 +  1) * T200
The d efault value of these four timers is 4 sec ond s [ (3 +  1) * 1] .
T321 is d efined as T203 +  10 sec ond s. As T203 d efaults to 30 sec ond s, T321 is 
d efined  as a 40 sec ond  timer. If the p hysic al loc ation is p art of an nonfac ility 
assoc iated  sig naling  (NFAS) arrang ement, field  13 id entifies this interfac e from 
other interfac es in the arrang ement. This information is also used  in the c od ing  of 
the c hannel-ID IE.4
Sp ec ifies that the inc oming  c all g ets the c hannel and  the switc h waits for 
the other end of the interfac e to resp ond  (the switc h would  exp ec t the 
other end  of the interfac e to rejec t its outg oing  c all attemp t)
Table A-1. Internal Definition Translations
Internal 
DefinitionChannel Characteristics 
on Outgoing Call from 
SwitchChannel Characteristic on 
Incoming Call to Switch Result
XP E 1
XE P 2
NP P 2
UP P 1
NE E 3
UE E 4 
						

							DEFINITY Communications System Generic 2.2 and Generic 3 V2 
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555-025-107  Issue 1
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Procedure 262 Word 3
This word  is used to enab le or d isable the c od eset map p ing  and  D-c hannel 
hyp erac tivity detec tion features for Generic  2. These features are d efined  on a 
PRI interfac e b asis.
Procedure 275 Word 4
Field  14 of this word  is used  to enab le ISDN. No ISDN messag ing or feature 
p roc essing oc c urs unless this field  is set to a 1
.
Procedure 279 Word 1
This p roc ed ure d efines information that is sent out in the NSF IE of the setup 
messag e for Generic  2. This IE req uests a servic e or feature from the remote end  
of the ISDN link for a partic ular call.
All known features or servic es req uested  b y or of the Generic  2 switc h must b e 
translated  in this p roc ed ure. The c orrec t enc od ings for the feature or servic e are 
to b e ob tained  from the 
AT&T ISDN Primary Rate Interfac e Sp ec ific ation. 
Examples of suc h servic es are SDN, MEGACOM 800, MEGACOM, INWATS, 
WATS, and  ACCUNET switc hed  d ig ital servic e.
The enc od ing  of the NSF IE is d isc ussed  further in the Proc edure 309 Word  5 
sec tion of this ap p end ix.
Procedure 280 Word 1
This p roc ed ure c an alter op c od e values of IEs and affec t the c od eset assoc iated 
with an IE. In System 85 R2V4 user-to-user information is assoc iated  with c od eset 
7 while in Generic  2 it is assoc iated  with c od eset 6.
The following  IEs have c hang ed  opc od e values b etween System 85 R2V4 and  
Generic  2:
Table A-2. System 85 R2V4 to Generic 2 IE Opcode Translations
IE Opcode Value
Information Element (IE) Name R2V4 G2
Link layer p arameters 1 64
Packet layer p arameters 2 62
Log ic al link id entific ation 4 26 
						

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The following  two user-to-user IEs kep t the same op c ode values in their move 
from c od eset 7 to c od eset 6:
Generic  2 switc hes map  outg oing  user-to-user information to c od eset 7 if 
c ommunic ating  with a System 85 R2V4. Also, inc oming  c od eset 7 information 
from a System 85 R2V4 is map p ed  to c od eset 6 for interp retation b y a Generic  2 
switch.
In g eneral, the following  map p ings are rec ommend ed  for Generic  2 switc hes 
when they are in a network that c ontains at least one System 85 R2V4 switc h:
1. X represents any c odeset map numb er
Tab le A-3. User-to-User IE Op c od es
Information Element (IE) Name Opcode Value
Traveling class mark 8
Disp lay 40
Table A-4. Codeset Map Number to Incoming and Outgoing Translations
Procedure 280
Mapped From:
Codeset Map 
NumberMapped To:
Incoming/ 
OutgoingCodeset/ Opcode 
Va l u eCodeset/ 
Opcode 
Va l u e
X
1I 7/1 6/64
XI7/26/62
XI7/46/26
XI7/86/8
X I 7/40 6/40
X O 6/64 7/1
X O 6/62 7/2
X O 6/26 7/4
XO6/87/8
X O 6/40 7/40 
						

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DS1/CEPT1/ISDN PRI Reference  
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Procedure 309 Word 5
This word  d eals with the sending  of a p artic ular NSF IE in the setup messag e and 
with rules of route selection.
Field 4, ISDN Trunk Type
This field  c an only c ontain a value when the trunk group  assoc iated  with the p lan, 
p attern, or p referenc e has a typ e of ISDN d ynamic . Here, it must have a value 
entered  or the outg oing  c all over this p referenc e will fail. The selec tion of a trunk 
typ e is not c ruc ial sinc e the ARS feature d etermines c od e flow more so than d oes 
the trunk typ e. However, an ap p rop riate trunk typ e should  b e selec ted  for the 
c alls assoc iated  with this p lan, pattern, or p referenc e.
Field 5, Network Service Value
The value entered  in this field  along  with the value entered  in field  12 of 
procedure 309, word 1 (the IXC/ISDN network identifier) determine the
NSF IE for c alls routed  over this p lan, p attern, or p referenc e. An NSF IE is not 
sent if a value is not entered . If field  5 has no value b ut an IXC/ISDN network 
id entifier is sp ec ified , the network id entific ation is sp ec ified  with the transit 
network selec tion IE instead  of the network-spec ific  fac ilities IE.
The following  sub sec tions examine the layout of this IE.
OUTWATS Band NSF
These values sp ec ify that the p lan, p attern, or p referenc e is req uesting servic e 
for OUTWATS bands 0-255 respectively.
Op cod e: 2
The following  three items are sent only if field 12 of p roc ed ure 309, word 1, is 
nonzero p roc ed ure 309, word  1, is nonzero.
Network id entific ation p lan: c arrier id entific ation c od e
Typ e of network identific ation: national network id entific ation
Network id entific ation: (three oc tets show the value entered  in field  12 of 
p roc ed ure 309, word  1)
Fac ility c od ing  value: 1
Feature/servic e: servic e
Parameter/b inary: b inary
MEGACOM NSF
Op cod e: 2
The following  three items are sent only if field 12 of p roc ed ure 309, word  1, is 
nonzero. 
						

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Network id entific ation p lan: c arrier id entific ation c od e
Typ e of network identific ation: national network id entific ation
Network id entific ation: (three oc tets show the value entered  in field  12 of 
p roc ed ure 309, word  1)
Fac ility c od ing  value: 3
Feature/servic e: servic e
Parameter/b inary: b inary
WAT S  N S F
Op cod e: 2
The following  three items are sent only if field 12 of p roc ed ure 309, word  1, is 
nonzero.
Network id entific ation p lan: c arrier id entific ation c od e
Typ e of network identific ation: national network id entific ation
Network id entific ation: (three oc tets show the value entered  in field  12 of 
p roc ed ure 309, word  1)
Fac ility c od ing  value: 5
Feature/servic e: servic e
Parameter/b inary: b inary
ACCUNET NSF
This value req uests ACCUNET switc hed  d ig ital servic e from a 4E13 or later 
g eneric .
Op cod e: 2
The following  three items are sent only if field 12 of p roc ed ure 309, word  1, is 
nonzero.
Network id entific ation p lan: c arrier id entific ation c od e
Typ e of network identific ation: national network id entific ation
Network id entific ation: (three oc tets show the value entered  in field  12 of 
p roc ed ure 309, word  1)
Fac ility c od ing  value: 6
Feature/servic e: servic e
Parameter/b inary: b inary
In Generic  2, servic es and  features are ad ministered  in p roc ed ure 279. The 
number entered in field 5 is not a fixed number as in System 85 R2V4; instead it 
is the ISDN network servic e value numb er assig ned  to the feature or servic e in 
p roc ed ure 279.
The list b elow d efines how the following  field s of the NSF are c od ed:
nFacility coding value
nFeature/servic e