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
Physical Layer 
Page 4-7 Framing Format 
4
Tab le 4-1 illustrates these p oints:
Notes:
1. C1 throug h C4 =  CRC-4 b its
2. U =  Unassig ned  b it
3. Yf =  Remote frame alarm b it
4. E =  Remote end  b loc k error b its
G2.2 Framing Format Implementation
In G2.2 you selec t either ESF or D4 framing  in p roc ed ure 260, word  1, field  6.
Table 4-1. 2.048 Mbps CEPT1 in Channel 0...

DEFINITY Communications System Generic 2.2 and Generic 3 V2 
DS1/CEPT1/ISDN PRI Reference  
555-025-107  Issue 1
July 1993
Physical Layer 
Page 4-8 Companding 
4
G3V2 Framing Format Implementation
If you administer the DS1 bit rate, the G3V2. supp orts D4 and  ESF as op tions in 
the S1 c irc uit p ac k form. You should  use ESF if p ossib le. The p rimary reason for 
this is for reframing  after a misframe. ESF automatic ally reframes whereas D4 
d oes not. This ab ility to reframe is esp ec ially c ruc...

DEFINITY Communications System Generic 2.2 and Generic 3 V2 
DS1/CEPT1/ISDN PRI Reference  
555-025-107  Issue 1
July 1993
Physical Layer 
Page 4-9 Companding 
4
1. Excep t Cairo, whic h uses mu-law c omp and ing  at the CEPT1 bit 
rate.
Table 4-2. Countries Supporting A-Law Companding at the CEPT1 Bit Rate
European
Belg ium Czechoslovakia Franc e
Germany Greec e Hung ary
Italy Netherland s Russia
Sp ain Switzerland U.K.
Pacific Rim
Australia China Ind ia
Ind onesia New Zealand Philip p ines
Sing ap ore...

DEFINITY Communications System Generic 2.2 and Generic 3 V2 
DS1/CEPT1/ISDN PRI Reference  
555-025-107  Issue 1
July 1993
Physical Layer 
Page 4-10 Channel Structure and Signaling 
4
Any DEFINITY system using  any DS1 interfac e board  other than the TN464C or 
later is mu-law b y d efault and  c annot b e c hang ed  in ad ministration.If a TN464C 
or later is used  on a G3V2, however, c omp and ing  is ad ministrab le. The following  
field  ap p ears on the DS1 c irc uit p ac k form:
NOTE:
A system c...

DEFINITY Communications System Generic 2.2 and Generic 3 V2 
DS1/CEPT1/ISDN PRI Reference  
555-025-107  Issue 1
July 1993
Physical Layer 
Page 4-11 Channel Structure and Signaling 
4
Following  are the CEPT1 signaling  typ es:
nBit oriented  c ommon c hannel sig naling , whic h inc lud es only one type 
c alled  c hannel assoc iated  sig naling  (CAS)
nISDN PRI sig naling
Robbed-Bit Signaling
Rob b ed -b it sig naling (RBS) may b e used  over DS1 1.544 mb p s fac ilities. With 
RBS, in every 6th frame...

DEFINITY Communications System Generic 2.2 and Generic 3 V2 
DS1/CEPT1/ISDN PRI Reference  
555-025-107  Issue 1
July 1993
Physical Layer 
Page 4-12 Channel Structure and Signaling 
4
For AT&T p roprietary signaling , a c omp lete set of sig naling  information is sent 
every 24 frames. This 24-frame period  is not sync hronized  to the 12-frame 
sup erframe (D4) format or to the 24-frame extend ed  sup erframe (ESF) format. 
Eac h sig naling  b yte c ontains the eq uivalent of a c hannel id entific...

DEFINITY Communications System Generic 2.2 and Generic 3 V2 
DS1/CEPT1/ISDN PRI Reference  
555-025-107  Issue 1
July 1993
Physical Layer 
Page 4-13 Channel Structure and Signaling 
4
Notes:
1. .X =  Reserved  for future use. Set to 0.
2. RMA =  Remote multiframe alarm (0 =  alarm; 1 =  normal)
3. Bit 7 =  Primary b it p attern for sig naling  integ rity check
4. Bits 3, 4, 5, and  8 in frame 24 =  Sec ond ary b it p attern for sig naling  integ rity check
5. A and B = Signaling bits for indicated...

DEFINITY Communications System Generic 2.2 and Generic 3 V2 
DS1/CEPT1/ISDN PRI Reference  
555-025-107  Issue 1
July 1993
Physical Layer 
Page 4-14 Channel Structure and Signaling 
4
Like CEPT1 framing , CAS sig naling is c yc led  throug h sixteen (0-15) frames (eac h 
c ontaining  c hannels 0-31), as shown in Ta b l e  4 - 6
:
Notes:
1. X =  unused  b it to b e set to 1.
2. Y =  b it used  to ind icate multiframe alig nment.
3. 0000 =  In b its 1 through 4 of frame 0. Multiframe alig nment sig nal.
4....

DEFINITY Communications System Generic 2.2 and Generic 3 V2 
DS1/CEPT1/ISDN PRI Reference  
555-025-107  Issue 1
July 1993
Physical Layer 
Page 4-15 Channel Structure and Signaling 
4
Note that exc ep t for frame 0, the 16th c hannel of eac h frame hold s the sig naling  
for two voic e/d ata c hannels. The sig naling  is held  in p ositions A throug h D. For 
examp le, the 16th c hannel of frame 2 hold s the sig naling  bits (bits A throug h D) 
for voic e/d ata c hannels 2 and  18. The 16th c hannel of...

DEFINITY Communications System Generic 2.2 and Generic 3 V2 
DS1/CEPT1/ISDN PRI Reference  
555-025-107  Issue 1
July 1993
Physical Layer 
Page 4-16 Channel Structure and Signaling 
4
G3V2 Signaling Implementation
The following  field  ap p ears in the DS1 c irc uit p ac k form:
If you administer c ommon c hannel sig naling , you must also c omp lete the 
following  field on the DS1 c irc uit p ac k form:Signaling Mode:
Enter either robbed-bit
, common-chan
, or isdn-pri
, CAS
, 
or isdn-ext
. Ad...