Lucent Technologies Definity Audix System Digital Networking Guide

							DEFINITY AUDIX System Digital Networking  585-300-534  Issue 2
May 1999
DEFINITY AUDIX Digital Networking Considerations 
2-3 Disk Sizing for Local and Remote Subscribers 
2
15-Hour Disk Combinations
For the 15-hour d isk, two c omb inations are given. There c an b e either 1000 loc al 
and  8000 remote sub sc rib ers or 500 loc al and  12,000 remote sub sc rib ers or 
some other valid c omb ination. Use the following  eq uation to d etermine what c an 
b e sup p orted  on the 15-hour d isk:
(LOCAL_SUBS * 7.5) + REMOTE_SUBS £ 16,000
40-Hour Disk Combinations
For the 40-hour d isk, two c omb inations are given. There c an b e either 2000 loc al 
and  10,000 remote sub sc rib ers or 1200 loc al and  16,000 remote sub sc rib ers or 
some other valid c omb ination. Use the following  eq uation to d etermine what c an 
b e sup p orted  on the 40-hour d isk:
(LOCAL_SUBS * 7.5) + REMOTE_SUBS £ 25,000
Limitations on the 100-Hour Disk Drive
Althoug h the 100-hour d isk d rive will ac c ommod ate up  to 100,000 loc al and  
remote subsc rib ers, the automatic  weekly names b ac kup c an handle a maximum 
of ap proximately 60,000 remote sub sc rib ers. If there are more than 60,000 
remote subsc rib ers, then only the loc al sub sc rib er names will b e b ac ked up  
d uring the weekly names b ac kup . However, a d emand bac kup  of the loc al and  
remote subsc rib er names remains p ossib le up  to a total of ab out 90,000 remote 
sub sc rib ers. No c ustomer bac kup  of the remote sub sc ribers’ voic ed  names is 
p ossib le if there are more than 90,000 remote sub sc rib ers. 
Table 2-2. Maximum Local and Remote Subscribers by Disk Size
15-Hour Disk 40-Hour Disk100-Hour
Disk
Maximum Loc al 
Su b s c r i b e r s1000 or 500 2000 or 1200 2000
Maximum 
Re m o t e  
Su b s c r i b e r s8000 or 12000 10,000 or 16,000 100,000 
						

							DEFINITY AUDIX System Digital Networking  585-300-534  Issue 2
May 1999
DEFINITY AUDIX Digital Networking Considerations 
2-4 Digital Networking Configurations 
2
Digital Networking Configurations
DEFINITY AUDIX d ig ital networking is an op tional feature that p rovid es users with 
the ab ility to exc hang e voic e messag es with users on other DEFINITY AUDIX 
systems, Intuity AUDIX systems, and  AUDIX R1 systems. The remote system may 
b e c oloc ated  with or g eog raphic ally d istant from the loc al DEFINITY AUDIX 
system. DEFINITY AUDIX d ig ital networking  uses the p rop rietary AUDIX d ig ital 
p rotoc ol to exc hang e voic e messag es, sub sc rib er p rofiles, and  messag e status 
information with other AUDIX systems. Dig ital networking  is muc h more sec ure 
than AMIS analog  networking . 
DEFINITY AUDIX d igital networking  p rovid es b oth hig h-sp eed  and  low-sp eed  
c onnec tivity. The typ e of d ata c onnec tion you use d ep ends on the fac ilities at 
your site and  how you plan to c onnec t with remote sites. Hig h-sp eed  c onnec tivity 
is p referred  if you have hig h-sp eed  fac ilities b etween loc ations or heavy traffic  
b etween sites or c ommunities of interest. 
High-Speed Connectivity
DEFINITY AUDIX d ig ital networking  p rovid es two hig h-sp eed  network c onnec tion 
types. 
See Chap ter 3, ‘‘DCP Mode 3 — 64 Kb p s’’
 and Chapter 5, ‘‘DCP Mode 1 — 56 
Kbps’’ for a c omp lete desc rip tion and  network c onfig uration examples.
Low-Speed Connectivity
DEFINITY AUDIX d ig ital networking  p rovid es one low-speed  network c onnec tion 
type. DCP Mod e 2 is an async hronous, low-sp eed  (9600 or 19,200 b p s) 
connec tion. See Chap ter 4, ‘‘DCP Mod e 2 — 9600 or 19,200 b ps’’
, for a 
d esc rip tion of Mod e 2 and  network c onfiguration examp les.
DCP Mod e 2 uses one of the following  typ es of mod em/d ata mod ule 
arrang ements:
nDCP p ort, 7400A d ata mod ule (c onnec ts to a TN754 c irc uit p ac k), 
mod em, and  analog  p ort as shown in the following  fig ure. DCP Mod e 1 A Luc ent Tec hnolog ies p rop rietary Dig ital Communic ations 
Protoc ol (DCP) c onnec tion using  a data rate of 56 Kb p s. DCP 
Mod e 1 uses a DS1 fac ility on the switc h or a d ed ic ated  fac ility 
on a T1 c arrier.
DCP Mod e 3 A DCP c onnec tion using  a data rate of 64 Kb p s. DCP Mod e 3 
uses a DS1 or ISDN fac ility on the switc h or a ded ic ated  fac ility 
on a T1 c arrier. 
						

							DEFINITY AUDIX System Digital Networking  585-300-534  Issue 2
May 1999
DEFINITY AUDIX Digital Networking Considerations 
2-5 Digital Networking Configurations 
2
Figure 2-1. Mode 2 DCP Port with 7400A Data Module
nElec tronic  Ind ustries Assoc iation (EIA) p ort (c onnec ts to a TN726 c irc uit 
p ac k), async hronous d ata unit (ADU), mod em, and  analog  p ort as shown 
in the following  fig ure.
Figure 2-2. Mode 2 with EIA Port and ADU
DEFINITY
AUDIX
Analog
port Analog
trunk
DCP port
TN754
7400A
Modem
PBX
Analog
T/RM7U
null modem
cable DCP
DEFINITY
AU DI X
Analog
por t Analog
trunk
EIA por t
TN726
ADU
Modem
PBX
Analog
T/RH-600-258, group
1
null modem
cable 
						

							DEFINITY AUDIX System Digital Networking  585-300-534  Issue 2
May 1999
DEFINITY AUDIX Digital Networking Considerations 
2-6 Control Link and Display Set Integrations 
2
Multistage Dialing
DCP Mod e 2 mod em/d ata module arrang ements use multistage d ialing . 
Multistage dialing permits a DEFINITY AUDIX digital networking port to place a 
c all to another DEFINITY AUDIX system in three stag es.
1. Call a DCP-to-mod em c onversion resourc e.
2. Initiate a sec ond  c all off p remises over analog  fac ilities to a remote 
mod em. 
3. Estab lish the final c onnec tion to the remote d ig ital networking port. 
All systems that network at low sp eed  with a DEFINITY AUDIX system must have 
multistag e d ialing  c ap ab ility. The DEFINITY AUDIX system, Intuity AUDIX system, 
and  A U D IX R1V5  and  l ate r sy st ems  (TN539B network c ard  req uired) ha ve  
multistag e d ialing . (AUDIX R1V8 is rec ommend ed  when networking  a DEFINITY 
AUDIX system with a non-U.S. AUDIX R1 system.) Chap ter 4, ‘‘DCP Mode 2 — 
9600 or 19,200 b p s’’, describes multistage dialing in more detail.
Modem Compatibility
Mod em c omp atib ility may b e a p rob lem esp ec ially when networking  with old er 
AUDIX R1 systems that use modem p ooling . (AUDIX R1V8 is rec ommend ed  
when networking  a DEFINITY AUDIX system with a non-U.S. AUDIX R1 system.) 
See Chap ter 4, ‘‘DCP Mode 2 — 9600 or 19,200 b p s’’
, for more information on 
mod em c omp atib ility.
 Mixed High-Speed and Low-Speed Connectivity
The DEFINITY AUDIX system c an sup p ort all three typ es of networking  
c onnec tions. The c onnec tion typ es (DCP Mod e 1, DCP Mod e 2, and  DCP Mod e 
3) are d ynamic  and  c an c hang e on a c all-b y-c all b asis to d ifferent systems for 
eac h networking p ort. For examp le, you c ould have a low-sp eed c onnec tion 
b etween the DEFINITY AUDIX system and  a g eog rap hic ally remote system and  a 
high-sp eed  c onnec tion to a system in the same b uild ing (a low-sp eed  
c onnec tion always need s ad ditional hard ware as d esc rib ed  ab ove in 
Low-Sp eed  
Connec tivity
). See Chapter 6, ‘‘Mixtures of Hig h-Sp eed  and  Low-Sp eed  
Networks’’, for a d esc rip tion and  c onfig uration examp les.
Control Link and Display Set 
Integrations
To p rovide d ig ital networking , the DEFINITY AUDIX system must emulate a d ig ital 
station p ort c irc uit pac k (TN754 or TN2181) on the switc h. Either Control Link 
(CL) or Disp lay Set (DS) switc h integ ration c an b e used  with the d ig ital port 
emulation. 
						

							DEFINITY AUDIX System Digital Networking  585-300-534  Issue 2
May 1999
DEFINITY AUDIX Digital Networking Considerations 
2-7 How the Digital Networking Ports Work 
2
How the Digital Networking Ports 
Wo r k
The DEFINITY AUDIX networking  p orts emulate the operation of a Dig ital 
Terminal Data Mod ule (DTDM) whic h c an b e attac hed  to a 7405D d ig ital 
telep hone. The networking  p orts ap pear to b e DTDMs to the switc h and  use the 
sec ond , p reviously unused , DCP I-c hannel. Therefore, d ig ital networking  d oes 
not c ontend  for the same physic al p orts used  for voic e.
Digital Port Emulation
The DEFINITY AUDIX system interac ts with the switch by emulating a TN754 or 
TN2181 d ig ital station p ort c irc uit p ac k. The TN754 c irc uit p ac k p rovid es 8 p orts 
on the switc h for d ig ital telep hones. The TN2181 c irc uit p ac k p rovides 16 p orts 
on the switc h for d ig ital telep hones. (The DEFINITY AUDIX system also c an 
emulate an analog  station p ort c irc uit p ac k, b ut d ig ital p ort emulation must b e 
used  for d ig ital networking .) 
Voice Port Administration Overview
To administer a DEFINITY AUDIX voic e port on the switc h, you ad minister a dig ital station. If 
the switc h software rec og nizes the DEFINITY AUDIX system as an AUDIX (native mode), 
you administer the station sc reen as one of the following :
nADX8D (8 port; G3V4 or later)
nADX16D (16 p ort; G3V4 or later)
nADXDP (8 p ort; G3V1 Issue 16.2 or g reater and  G3V2 and  G3V3)
nAUDIX (8 port; G3V1 p rior to Issue 16.2 and  G3i-Glob al Issue 1E40.03 or g reater)
DEFINITY AUDIX Release 4.0 will only b e rec og nized as native in DEFINITY switc h 
software release 7.1 and later.
If the switc h software only rec ognizes the DEFINITY AUDIX system as a TN754 or a 
TN2181, you ad minister the station sc reen as a 7405D station (alias).
Installation and  Switc h Ad ministration for the DEFINITY AUDIX System Release 
4.0,
 555-300-122 or Switc h Ad ministration for the DEFINITY AUDIX System, 
585-300-509, d esc rib es this ad ministration in detail.  
						

							DEFINITY AUDIX System Digital Networking  585-300-534  Issue 2
May 1999
DEFINITY AUDIX Digital Networking Considerations 
2-8 Features/Functionality Not Supported 
2
Networking Port Administration Overview
To administer a networking  p ort, you ad minister the d ata mod ule sc reen for a 
voic e port. To administer one networking port, you administer the data module 
sc reen for voic e p ort one. With Release 3.2 you c an administer a sec ond 
networking  p ort. To ad minister a sec ond  networking p ort, you ad minister the d ata 
mod ule sc reen for voic e p ort two. Chap ter 9, ‘‘Initial Network Ad ministration and  
Acceptance Tests’’, p rovid es a p roc ed ure for ad ministering  networking  p orts. If 
you have two networking  p orts, p lac e them in a switc h hunt g roup  and  make 
c ertain that the g roup  extension is within a Direc t Inward  Dial (DID) rang e. If 
using DCP Mode 2, you may want to set up  ad d itional hunt g roups — one for 
eac h p air of d ata module p orts, one for eac h p air of ADU ports, and  one for eac h 
pair of modem ports (refer to Chap ter 4, ‘‘DCP Mod e 2 — 9600 or 19,200 b p s’’
, 
for more information).
NOTE:
In areas where DID or Direc t Inward /Outward  Dial (DIOD) is not availab le, 
you may have to d edic ate a trunk to this ap plic ation with one or two 
memb ers. 
Features/Functionality Not Supported
DEFINITY AUDIX digital networking does not support the following:
nDirec t RS-232 networking (DCP Mode 2 with a modem/data module 
arrang ement p rovid es ind irec t RS-232 sup p ort.)
nText Servic es Interfac e
nCall Detail Rec ord ing
n Rec eiving  a fax from an Intuity AUDIX system
Considerations for Intersystem 
Networks
The DEFINITY AUDIX system c an network with other DEFINITY AUDIX systems, 
Intuity AUDIX systems, and  AUDIX R1 systems. Voice messag es are transmitted  
in a d igital file format, similar to a d ata file transfer b etween two c omputer 
systems. There are considerations when networking with an Intuity AUDIX system 
or an AUDIX R1 system. 
						

							DEFINITY AUDIX System Digital Networking  585-300-534  Issue 2
May 1999
DEFINITY AUDIX Digital Networking Considerations 
2-9 Considerations for Intersystem Networks 
2
Intuity AUDIX System
Intuity AUDIX systems that have fax c ap ability c annot send  faxes over a network 
to a DEFINITY AUDIX system sinc e the DEFINITY AUDIX system d oes not 
support fax messaging. 
The Intuity AUDIX system and  the DEFINITY AUDIX system b oth use the CELP 
voic e messag ing  enc od ing  alg orithm, so the voic e q uality of messag es sent 
b etween the two systems is not d eg rad ed . 
AUDIX R1 System
The DEFINITY AUDIX system c an ac c ommod ate messag es enc od ed  using  the 
CELP voic e messag ing  enc od ing  alg orithm or the sub -b and  alg orithm used  on 
the AUDIX R1 system. CELP voic e messag ing  enc od ing  is a hig her q uality than 
sub -b and . Bec ause AUDIX R1 uses only sub -band , outg oing  messag es 
transmitted  from a DEFINITY AUDIX system to an AUDIX R1 system will b e 
transc oded  (c onverted ) from CELP to sub -b and  format as the messag e is b eing  
sent to the remote system, so the voic e q uality of the messag e will be sub -b and  
q uality on the AUDIX R1 system. 
Inc oming  messages from an AUDIX R1 system will b e stored  in the sub -b and  
format in whic h they are rec eived. A messag e rec eived  from an AUDIX R1 
system will b e lower voic e q uality than other messag es rec eived  on a DEFINITY 
AUDIX system.
AUDIX R1 systems req uire a TN539B network c ard  to network with the DEFINITY AUDIX 
system. 
						

							DEFINITY AUDIX System Digital Networking  585-300-534  Issue 2
May 1999
DEFINITY AUDIX Digital Networking Considerations 
2-10 Considerations for Intersystem Networks 
2 
						

							DCP Mode 3 — 64 Kbps 
3-1 Considerations 
3
DEFINITY AUDIX System Digital Networking  585-300-534  Issue 2
May 1999
3
DCP Mode 3 — 64 Kbps
This c hapter d esc rib es Dig ital Communic ations Protoc ol (DCP) Mod e 3. DCP 
Mod e 3 is a hig h-sp eed , 64 Kb p s c onnec tion. Use this typ e of network 
connec tion when the systems to be networked are co-located (serving the same 
switc h) or when they are in d ifferent loc ations. (Two DEFINITY AUDIX systems 
c annot serve the same switc h, but a DEFINITY AUDIX system c an serve the 
same G3r switc h as an Intuity AUDIX system or an AUDIX R1 system.) 
The examp le in this c hap ter shows two DEFINITY AUDIX systems using  a DCP 
Mod e 3 c onnec tion. See Chap ter 6
 for a d esc rip tion of networks that c omb ine 
DCP mod es.
NOTE:
It is rec ommend ed  that 64 Kb p s c onnec tions b e used  to ac hieve maximum 
d ata throug hp ut whenever 64 Kbp s c onnec tivity is available b etween two 
systems.
Considerations
If a c ustomer is c onsid ering  using  DCP Mod e 3 c onnec tions in their DEFINITY 
AUDIX network, keep  the following  in mind :
nLoc al or remote networking  c onfig urations are sup p orted .
nThe DEFINITY AUDIX system c an network with other DEFINITY AUDIX 
systems, Intuity AUDIX systems, and  AUDIX R1 systems via this method .
nTransmission in this typ e of network is full-dup lex, sync hronous, at 
64 Kb p s.
nFor c o-loc ated systems, c ommunic ation b etween the DEFINITY AUDIX 
system and  the Intuity AUDIX system or AUDIX R1 system is from one 
switc h DCP p ort to another. 
						

							DEFINITY AUDIX System Digital Networking  585-300-534  Issue 2
May 1999
DCP Mode 3 — 64 Kbps 
3-2 General Information 
3
nFor remote c onfig urations, the c ustomer need s ac c ess to 64 Kb ps p ub lic  
or p rivate telep hone network fac ilities; these should  normally b e a T1 
c arrier with DS1 servic es or Integ rated  Servic es Dig ital Network Primary 
Rate Interfac e (ISDN PRI). The c ustomer need s a DS1 or ISDN interfac e 
on the switc h to c onnec t to these network fac ilities. 
nT1 to E1 c onversions are d one b y the long  d istanc e c arrier.
General Information
The following fig ure, DCP Mod e 3 Network for Multip le Loc ations, shows an 
arrang ement where two DEFINITY AUDIX systems are networked via 64 Kbp s 
servic es.
.
Figure 3-1. DCP Mode 3 Network for Two DEFINITY AUDIX Systems
DEFINITY
AUDIX
DEFINITY
AUDIX DS1/ISDN
port
DS1/ISDN
portPBX
PBX T1 or
ISDN PRI
T1 or
ISDN PRI
Public/private
network