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
Layers 2 and 3 
Page 5-35 ISDN PRI Layer 3 
5
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, regard less of whether the 
inc oming  c all hand ling  tab le is ad ministered  or not. For examp le, if the 
servic e typ e is tandem and  the inc oming  c all hand ling  tab le is b lank, any 
SDN,...

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 5-36 ISDN PRI Layer 3 
5
User-to-User Information Signaling
In ad d ition to provid ing  sig naling  to estab lish, maintain, and  terminate c alls, the 
layer 3 p rotoc ol also inc lud es signaling  allowing  end points to exc hang e 
information unrelated  to c all c ontrol. For examp le, while c all c ontrol sig naling  is 
taking  p lac e, information c an...

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 5-37 ISDN PRI Layer 3 
5
Some IEs are d efined  as c all c ontrol IEs b ut c an also b e used  for the p urp ose of 
user-to-user information sig naling . The c alling  p arty numb er, for examp le, whic h 
is d efined as a c all c ontrol IE, is often used  b y the end  user for ap p lic ations suc h 
as terminal displays.
In order to d isting uish b etween...

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 5-38 ISDN PRI Layer 3 
5
6. The op c od e on the G2.2 to whic h the inc oming  op c od e from field  4 is to 
be mapped is selected in field 6.
7. Step s 2 throug h 6 c an be rep eated  up  to 256 times for the inc oming  c ase.
8.Outgoing
 is selec ted  in field  2 and  step s 3 throug h 7 are rep eated . For 
every inc oming  map p ing there should  b e an id...

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 5-39 ISDN PRI Layer 3 
5
G3V2 systems allow the TCM and  lookahead  interflow IEs to b e sent in either 
c od eset 6 or 7. In the inc oming  d irec tion, these systems ac c ep t these IEs in 
either c od eset 6 or 7. You administer this in the trunk g roup  form in the field  
Codeset to Send TCM/Lookahead
. G3V2 systems also allow the d isp lay IE 
to b e sent...

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 5-40 ISDN PRI Layer 3 
5
Requirements for Sending Connected Number IE. 
In G2.2 systems, to send  the 
c onnec ted  numb er, the NPA-NXX d esig nator field  in p roc ed ure 354, word  3 must 
b e ad ministered . This d esig nator must also b e entered  in p roc ed ure 000 for the 
c onnec ted  p artys extension. The numb er sent is then always of the form...

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 5-41 ISDN PRI Layer 3 
5
p urp ose is to d isp lay the c alling p arty name for d isp lay on the c onnec ted  p artys 
terminal, thoug h anything  in the IE will b e displayed . When sent in the CONNec t 
messag e, its purpose is to d isp lay the c onnec ted partys name on the c alling  
p artys terminal, thoug h anything  in the IE will b e d isp layed . The ap...

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 5-42 ISDN PRI Layer 3 
5
Lookahead Interflow IE
All DEFINITY systems p op ulate the lookahead  interflow IE with the c ontents of the 
names d atab ase for the listed  VDN of the orig inating  system.
Low Layer Compatibility IE
The low layer c omp atib ility IE is used  to tell an end p oint, trunk g roup , or routing  
p referenc e, the c harac teristic s of the...

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 5-43 ISDN PRI Layer 3 
5
nFor c alls from non-ISDN end p oints to ISDN PRI trunks, the BC IE and LLC 
IE, except for the information type codepoint, is populated automatically 
b ased on the typ e of end point. For examp le, if the endp oint is an MPDM 
set for mod e 1 op eration, the BC IE and  LLC IE are p op ulated  with mod e 1 
c harac teristic s. Two exc ep...

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 5-44 ISDN PRI Layer 3 
5
— A c all of BCC 2 will use a preferenc e with BCC 2 set to yes
. If no 
suc h p referenc e exists, it will searc h for a p referenc e with BCC 0
 
set to yes
. Failing  this matc h, the c all is b loc ked  with interc ep t.
— A c all of BCC 1, 3, or 4 will b e b loc ked  with interc ep t.
— Calls from mode 2 end p oints must b e routed...