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
Equipment and Software Requirements 
Page 3-12 ESF T1 Channel Service Unit 
3
— SW6-6 set to op en
— SW6-7 set to c losed
— .SW6-8 set to op en
nFor a d istanc e from 500 feet to 655 feet, switc hes SW6-1 throug h SW6-8 
should  b e set as follows:
— SW6-1 set to op en
— SW6-2 set to c losed
— SW6-3 set to op en
— SW6-4 set to c losed
— SW6-5 set to op en
— SW6-6 set to c losed
—...

DEFINITY Communications System Generic 2.2 and Generic 3 V2 
DS1/CEPT1/ISDN PRI Reference  
555-025-107  Issue 1
July 1993
Equipment and Software Requirements 
Page 3-13 ESF T1 Channel Service Unit 
3
Other ESF T1 CSU Settings
Following  are add itional ESF T1 CSU switc h setting s:
nLeave the unit memory add ress c od e alarm op tion (roc ker switc h SW1) to 
the d efault (fac tory) setting . This switc h allows ESF d iag nostic  test sets to 
ad dress up  to 256 ESF T1 CSUs. This switc h d oes not have...

DEFINITY Communications System Generic 2.2 and Generic 3 V2 
DS1/CEPT1/ISDN PRI Reference  
555-025-107  Issue 1
July 1993
Equipment and Software Requirements 
Page 3-14 CEPT1 Channel Service Unit 
3
Loop b ac k Units. There are two b asic  families of these jac ks, the 3100-XX and  
3101-XX series. Eac h family c ontains 16 versions of the jac k. The only d ifferenc e 
in the two families are the loop b ac k ac tivate and d eac tivate c od es. The 3100-XX 
series has a 5 d ig it c od e, 11000 to ac...

DEFINITY Communications System Generic 2.2 and Generic 3 V2 
DS1/CEPT1/ISDN PRI Reference  
555-025-107  Issue 1
July 1993
Equipment and Software Requirements 
Page 3-15 Multiplexers and Other Customer Premises Equipment 
3
Multiplexers and Other Customer 
Premises Equipment
NOTE:
Equip ment suc h as T1 multip lexers, b it c omp ression multip lexers, and  
ec ho c anc ellers c an c orrup t the DS1/CEPT1 b it stream. This is esp ec ially 
true of ec ho c anc ellers. Some T1 multiplexers, for examp le,...

Physical Layer 
Page 4-1 Bit Rate 
4
DEFINITY Communications System Generic 2.2 and Generic 3 V2 
DS1/CEPT1/ISDN PRI Reference  
555-025-107  Issue 1
July 1993
4
4Physical Layer
This c hap ter d isc usses how various asp ec ts of the p hysic al layer p rotoc ols for 
DS1 and  CEPT1 trunks have b een d esig ned  into the DEFINITY systems. It 
d isc usses these sub jec ts as they relate to narrowband  (64 kb p s) switc hing .
For tec hnic al information on wid eb and  switc hing  in DEFINITY systems, refer...

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 4-2 Framing Format 
4
G2.2 Bit Rate Implementation
No spec ial ad ministration is required  to imp lement the b it rate in these systems.
G3V2 Bit Rate Implementation
To imp lement the d esired b it rate in G3V2 you must d o the following :
nDetermine the req uired  b it rate for your ap p lic ation. For examp le, you 
mig ht b e c onnec ting  to the pub lic...

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 4-3 Framing Format 
4
However, either the superframe or the extend ed  sup erframe format may b e 
c hosen; the d ec ision must d epend  on the network eq uipment and  ap p lic ation.
The framing  format does not p lac e any req uirement on the typ e of sig naling  or 
line c od ing  to b e used . However, the type of framing  used  at b oth end 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
Physical Layer 
Page 4-4 Framing Format 
4
Figure 4-1. DS1 Superframe Format
DS1 ESF Framing
The ESF framing  format was d evelop ed  after the sup erframe format. Not all 
eq uip ment used  with the DS1 interfac e sup p orts ESF. Sp ec ific ally, most D4 
c hannel b anks (unless they are c onfigured  as LIU-3ESF or eq uivalent) and  
CDMs d o not c urrently sup port ESF framing ....

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 4-5 Framing Format 
4
Figure 4-2. The Extended Super Frame
The sync hronization p attern for the ESF format is formed  b y the framing  b it from 
24 c onsec utive frames. Unlike the 12-b it sync hronization p attern for D4, whic h 
utilizes all of the availab le framing  b its for sync hronization, ESF emp loys only 6 of 
the availab le 24 framing  b its to 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 4-6 Framing Format 
4
NOTE:
The fac ility d ata link is a 4-kb p s d ata link d esig ned  to maintain and  
sup ervise the DS1 fac ility. However, this 4-kb p s d ata link is not used  b y 
DEFINITY systems.
The CRC is used  at the rec eiving  end  to d etec t transmission errors, as follows: 
The CRC is c alc ulated  at the transmitting  end  and  multip lexed...