ATT Definity Addendum 1 For Ds1, Dmi, Isdn Pri Instructions Manual

NETWORK CONNECTIONS AND CONFIGURATIONS2-13
System 85 or Generic 2 ISDN-PRI to Another Vendor’s Digital Switch½
When a System 85 or Generic 2 ISDN-PRI connects to another vendor’s customer-premises switch
(another vendor’s ISDN-PRI or equivalent), several items should be verified to ensure compatibility.
These include the interface electrical characteristics, options, and synchronization capabilities. The
following questions should be answered:
lDoes the vendor product provide a DSX-1 interface?
lDoes the...

2-14NETWORK CONNECTIONS AND CONFIGURATIONS
Framing, Signaling, and Line Coding
A 4ESS does not place any restrictions on the framing, signaling, and line-coding options. Any
applicable restrictions are related to the application and particular installation.
*
Dial Tone
Second dial tone may be provided by a 4ESS. However, it is recommended that the customer-premises
switch provide a second dial tone. With this arrangement, the second dial tone can be provided through
use of the ARS feature on all ISDN-PRI...

NETWORK CONNECTIONS AND CONFIGURATIONS2-15
Network Specific Facility
A network specific facility (NSF) is an ISDN IE, sent in the setup message, that identifies the network
or feature associated with the call. For outgoing calls from the customer-premises side, the 4E11 and
4E12 will accept a NSF but do not require that one be present for static calls. When connected to a
4ESS, a System 85 R2V4, Generic 1, Generic 2 must send the appropriate NSF for MEGACOM, SDN,
ACCUNET, and switched digital...

2-16NETWORK CONNECTIONS AND CONFIGURATIONS
ISDN-PRI INTRA-SWITCH CONNECTIONS½
ISDN-PIR links may also be used to connect certain AT&T features to the switch to enhance feature
performance. The following products used ISDN-PRI trunks in this manner.½
½
Generic 2 ISDN-PRI with the Integrated Telemarketing Gateway Interface½
The Integrated Telemarketing Gateway Interface (ITGI) feature provides an interface between a
Generic 2.1 (Issue 3.0) and an Integrated Telemarketing Gateway (ITG). ITG is a hardware...

3. DS1 TRANSMISSION AND CABLING
Digital signal level 1 (DS1) is the specification for a particular digital signal format. DS1 interfaces
should not be confused with T1 digital carriers. T1 is a specific transmission system. T1s are used to
transmit digital signals of the DS1/DMI/ISDN-PRI format. This chapter describes the different methods
of transmitting DS1 from one point to another.
A digital transmission network consists of the following four major parts:
lTerminals
lMultiplexers
lCross-connects...

3-2DS1 TRANSMISSION AND CABLING
Digital transmission facilities are used to transmit digital signals from one location to another. Many
different digital transmission systems exist of which T1 is one. The type of facility used depends
primarily on the distance between the endpoints, but other requirements may also affect facility
selection. For example, an application may require nonmetallic facilities as opposed to metallic ones for
reasons specific to that application. Examples of some of the DS1...

DS1 TRANSMISSION AND CABLING3-3
l
l
l
l
l
lRemoving bipolar violations (which implies incompatibility with B8ZS line coding)
Termination of a DS1 or regeneration of received data using an office repeater
Provisions for supplying DC power to a DS1 to power line repeaters
A fault-locating jack to aid in testing repeaters on DS1s
Jacks for manually looping the NCTE and aiding in maintenance testing
A DC-triggered remote (toward the far end) loopback relay½
Other optional features include inband loopback...

3-4DS1 TRANSMISSION AND CABLING
TABLE 3-1. CSU #1 and Bit Error Rate Threshold Switch Settings½
½
ESF T1 NCTE
Standalone½
D4 3Switch
NumberESF T1 NCTE
Multiline
DIP-
Switch
Switch
Name
NumberDfltESF 1ESF 2ESF 1ESF 2D4 3
/D4
SW5isDflt
SW4isDflt
NANA
NANANA
NANANA
NA
Dflt
 /D4
C
C
C
C
C
C
C
O SW1-1
SW1-2
SW1-3
SW1-4
SW1-5
SW1-6
SW1-7
SW1-8SW5-1
SW5-2
SW5-3
SW5-4
SW5-5
SW5-6
SW5-7
SW5-8 O
C
C
C
C
SW1
C
C
C
O
C
OSW2
O
O
NAONAONAO NCTE
#1Dflt
is
SW4-1
SW4-2
SW4-3
SW4-4
SW4-5
SW4-6
SW4-7
SW4-8O
C
O
O
O
O
O
O...

DS1 TRANSMISSION AND CABLING3-5
TABLE 3-3. Configuration A and B Switch Settings½
DIP-
Switch
NameESF T1 NCTEESF T1 NCTE
StandaloneMultiline
Switch
NumberDfltESF 
1ESF 2
/D4D4 
3Switch
NumberDfltESF 1ESF 2
/D4D4 
3
SW5-1
SW5-2
SW5-3
SW5-4C
C 4
C 5
OO
C
C
CC
C
C
OC
C
C
OSW1-1
SW1-2
SW1-3
SW1-4O
O
O
ONANANA
O
O
CO
O
OO
O
O
Config
B
SW5-5
SW5-6
SW5-7
SW5-8O
O
O
OC
O
O
NAO
O
O
NAO
O
OSW1-5
SW1-6
SW1-7
SW1-8O
C 6
C 7
CC
C
C
OO
C
C
CO
C
C
C
NA
SW6-1
SW6-2
SW6-3
SW6-4C 
8
O 5
O 4
CO
O
O
CO
O
O
CO
O
O
CSW7-1...

3-6DS1 TRANSMISSION AND CABLING
TABLE 3-5. PWR Switch Settings½
ESF T1 NCTE
DIP-
Switch
NameESF T1 NCTE
Standalone
Multiline
Switch
NumberDfltPos.Pos.Pos.
Switch
NumberDfltPos.Pos.
Pos.
#1#2#3
#1#2#3
PWRS1
DL
DL
local
power
WETWL
local
power
DRY
SP
SPAN
power
S1
DL
DL
local
power
WETWL
local
power
DRYSP
SPAN
power
NOTE: Local exchange companies (LECs) are currently installing Smart jacks requiring the use of a 0dB line build-out network (LBO).½
½
½
½
½
TABLE 3-6. XMT (LBO) Switch Settings½
DIP-ESF T1...