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

							ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 75 R1V2 & R1V37-123
l
l
lEnhanced digit manipulation
Request of CPN/BN (Calling Party Number/Billing Number) (formerly SID/ANI) on a call by call
basis
Night destination½
½
½
½
Figures 7-62, Trunk Group Screen, Page 1 (ISDN-PRI Trunk Group), 7-63, Trunk Group Screen, Page 2
(ISDN-PRI Trunk Group), 7-64, Trunk Group Screen, Page 3 (CBC Usage), 7-65, Trunk Group Screen,½
½
½
Page 4 (CBC Usage), and 7-66, Routing Pattern Screen depict this procedure.
TRUNK GROUPPage 1
Group Number:Group Type: isdn-priSMDR Reports? y
Group Name:OUTSIDE CALLCOR : 1TAC:Direction: two-wayOutgoing Display? n
Dial Access? yBusy Threshold: 60Night Service:
Queue Length: 0
Service Type: cbcAuth Code? n
Usage Alloc? nFar End Test No:
TRUNK PARAMETERS
Loss Plan: pbx-eiaDigital Conn Loss: normal
Bit Rate: 1200Synchronization: asyncDuplex: full½
½
½
½
Figure 7-62. Trunk Group Screen, Page 1 (ISDN-PRI Trunk Group)½
ADDENDUM 1 (December 1990) to 555-025-101, Issue 4 
						

							7-124ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 75 R1V2 & R1V3
TRUNK FEATURES
ACA Assignment? n
MIS Measured? n
Used for DCS? n
Maintenance Tests? y
Service/CalledCalledPage 2
Internal Alert ? n
Data Restriction? n
Send CPN? n
Send Name? n
DelInsertPer CallCPN/BNNight
ServFeatureLenNumber
Figure 7-63. Trunk Group Screen, Page 2 (ISDN-PRI Trunk Group)
CBC Trunk Group Usage Allocation
Trunk Allocation Plan 1Trunk Allocation Plan 2Trunk Allocation Plan 3
Service/Min#Max#Service/
Min#Max#Service/
Min#Max#FeatureChanChanFeatureChanChanFeatureChanChan
Figure 7-64. Trunk Group Screen, Page 3 (CBC Usage)
ADDENDUM 1 (December 1990) to 555-025-101, Issue 4 
						

							ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 75 R1V2 & R1V37-125
CBC Trunk Group Usage Allocation Plan Assignment Schedule
Usage Method:
Fixed? yAllocation Plan
Scheduled? n
Usage Allocation Plan Activation Schedule:
ActPln
ActPlnActPlnActPlnTime #Time #Time #Time #
Sun
Mon
Tue
Wed
Thu
Fri
SatNumber: 1ActPlnTime #ActPlnTime #
___ : ___ _
___ : ___ _
___ : ___ _
___ : ___ _
___ : ___ _
___ : ___ _
___ : ___ ____ : ___ _
___ : ___ _
___ : ___ _
___ : ___ _
___ : ___ _
___ : ___ _
___ : ___ ____ : ___ _
___ : ___ _
___ : ___ _
___ : ___ _
___ : ___ _
___ : ___ _
___ : ___ ____ : ___ _
___ : ___ _
___ : ___ _
___ : ___ _
___ : ___ _
___ : ___ _
___ : ___ ____ : ___ _
___ : ___ _
___ : ___ _
___ : ___ _
___ : ___ _
___ : ___ _
___ : ___ ____ : ___ _
___ : ___ _
___ : ___ _
___ : ___ _
___ :___ ____ : ___ _
___ : ___ _
Figure 7-65. Trunk Group Screen, Page 4 (CBC Usage)
Pattern
GrpNo.1.
2.
3.4.
5.
6.
Routing Pattern Number: 1
Assignments (Enter Up To 6)
FRL NPA Prefix Toll
MarkListNo. Del.Inserted
DigitsDigits
Supplemental ISDN Routing Information
BCC011.
2.
3.
4.5.
6.
VALUE
Service/Feature
234
_____
_____
_____
_____
_____
_____
Band:Band:Band:Band:Band:Band:
IXC
Figure 7-66. Routing Pattern Screen
ADDENDUM 1 (December 1990) to 555-025-101, Issue 4 
						

							7-126ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 75 R1V5 & GENERIC 1
ADDENDUM 1 (December 1990) to 555-025-101, Issue 4 
						

							ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 75 R1V5 & GENERIC 17-127
GENERIC 1
Generic 1 has the same DS1 facility considerations (such as framing, signaling, line coding format) as
System 75. It also requires the additional clock circuit pack for synchronization. The main significant
difference between a System 75 and Generic 1 is support of the TN767 circuit pack for both DS1/DMI
and ISDN-PRI.
Depending on whether a Generic 1 provides private network ISDN service or public network ISDN
services, whether the switch functions as an endpoint or as a tandem node, will determine whether other
features or screens should be administered with ISDN-PRI. Primarily, these other features and screens
include:
1.     AAR/ARS
2.     Ten- to seven-digit conversion
3.    DCS/uniform dialing plan
4.    Call-by-Call Service Selection
5.     SID prefix assignments
6.     Routing patterns
7.    Nonfacility Associated Signaling (NFAS) and D-channel backup
The 
SYSTEM-PARAMETERS CUSTOMER-OPTIONS screen displays these and other optional features. New
switches should come with the appropriate optional features already enabled. Switch upgrades
(depending on the specifics) may require that the CSSO alter the 
SYSTEM-PARAMETERS CUSTOMER-OPTIONS
screen.½
½
½
½
½
½
DS1 Circuit Pack Options
The 
DS1 CIRCUIT PACK screen is used to define characteristics of the DS1 facility. This screen requires that
the circuit pack (TN722/TN767) have been previously assigned to an equipment location (carrier and
slot) by the 
CIRCUIT PACK ADMINISTRATION screen. For ISDN-PRI applications, the screen has minor
differences. Therefore, two screens are depicted. The first is for DS1/DMI-BOS and the second is for
ISDN-PRI.
Screens are shown with default or recommended field options. Figures 7-67, DS1 Circuit Pack Screen,
Common-Channel Signaling, 7-68 DS1 Circuit Pack Screen, ISDN-PRI Signaling, and 7-69 DS1 Circuit
Pack Screen, ISDN-EXT Signaling depict the three possible ways to use this procedure.½
½
½
½
ADDENDUM 1 (December 1990) to 555-025-101, Issue 4 
						

							7-128ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 75 R1V5 & GENERIC 1½
Location:Line Compensation: 1
Framing Mode: esf
DMI-BOS? y
Slip Detection? nDS1 CIRCUIT PACK
Name:Zero Code Suppression:
Signaling Mode:
MAINTENANCE PARAMETERS
Remote Loop-Around Test?Page 1 of 1zcscommon-chan
n
Figure 7-67. DS1 Circuit Pack Screen, Common-Channel Signaling½
Location:Line Compensation: 1
Framing Mode: esf
Slip Detection? nDS1 CIRCUIT PACKPage 1 of 1Name:Zero Code Suppression: zcs
Signaling Mode: isdn-pri
Connect:pbxInterface: user
MAINTENANCE PARAMETERS
Remote Loop-Around Test? n
Figure 7-68. DS1 Circuit Pack Screen, ISDN-PRI Signaling
ADDENDUM 1 (December 1990) to 555-025-101, Issue 4 
						

							ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 75 R1V5 & GENERIC 17-129
DS1 CIRCUIT PACKPage 1 of 1
Location:Name:Line Compensation: 1Zero Code Suppression: b8zs
Framing Mode: esfSignaling Mode: isdn-ext
MAINTENANCE PARAMETERS
Remote Loop-Around Test? n½
Slip Detection? n½
Figure 7-69. DS1 Circuit Pack Screen, ISDN-EXT Signaling½
Service/Facility Options½
Location
A display-only field specifying the carrier and slot of the DS1 Interface.
Name
The name as assigned on the network diagram.
ADDENDUM 1 (December 1990) to 555-025-101, Issue 4 
						

							7-130ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 75 R1V5 & GENERIC 1
LineRefers to the distance between the switch and the network channel-terminating
Compensationequipment (NCTE), CDM, CEM, DSX-1 cross-connect, T1 office repeater, or other
equipment. The compensation setting is for the total distance between the switch and
the endpoint. Table 7-15, Line Compensation Values, summarizes compensation.
TABLE 7-15. Line Compensation Values
Compensation ValueDistance (Feet)
1000 to 133
2133 to 266
3266 to 399
4399 to 533
5533 to 655
NOTE: Compensation values assume 22-gauge ABAM or 24-gauge PDS cables.
Two colocated switches can be up to 1310 feet apart with compensation on both
systems set to the maximum values. If 26-gauge PDS cables are used, distances½
½
are reduced as shown in table 3-1, System 85 Traditional Module Equalizer½
Settings (Metallic Cable).
The T1 office repeaters or T1 line repeaters can be used when the on-premises distance
limitation is exceeded. A T1 office repeater is required at each end of the connection
to provide an interconnection range of up to 3000 feet. Each repeater only provides
regeneration for the receive direction. The T1 line repeaters can be used to
accommodate distances up to 6000 feet between switches. The T1 line repeaters can
be used in tandem to accommodate greater distances.
Zero Code
Specifies the line coding format (ZCS or B8ZS) that will be used to forcibly ensure
Suppression
that the data meets T1-carrier ones-density requirements. The choice of data rates,
communications protocol, and facility requirements discussed under System 85
procedure 260, field 9, also apply here.
Framing
The choices are D4 or ESF (previously called F ). The network diagram should
Mode
eshow the choice for the particular DS1/T1-span. The other end and all intermediate
equipment should be optioned accordingly.½
½
ADDENDUM 1 (December 1990) to 555-025-101, Issue 4 
						

							ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 75 R1V5 & GENERIC 17-131
SignalingThe default option is common-channel. This option is the same as 24th-channel or
ModeAVD for System 85. The alternate choices are ISDN-PRI and robbed-bit.
If ISDN-PRI is optioned, then the DMI-BOS field disappears and the Connect field
appears. The choice of signaling mode used is dependent on the application.
If ISDN-EXT is optioned (Generic 1 R1V5 only), the DMI-BOS field disappears (D-
channel related fields do not appear). This option assings FAS/NFAS to this DS1 and
D-channel related data are administered in the 
SIGNALING GROUP screen.
Common-channel signaling multiplexes all signaling information for channels 1-23 into
the 24th-channel. This makes the full 64K-bps bandwidth of channels 1-23 available
for voice and/or digital data transmission. This capability is sometimes called
Alternate Voice Data (AVD).
The term AVD is a software attribute for a trunk. It (AVD) allows pure 64K-bps
digital data to be transmitted over those DS1 trunks that use 24th-channel signaling.
Although AVD trunks are designed for digital data transmission they may also be used
for voice and voice-grade data transmission. However, a pooled modem is required to½
½
½
½
½
½
½
transmit voice-grade data over AVD trunks.
Due to a change in the evolving DS1/DMI protocol specification, two
CAUTIONmethods for providing 24th-channel signaling exist. The two methods
are not compatible with each other. The earlier method is known as the
AT&T proprietary format (conventional T1 test equipment cannot½
½
½
½
½
½
analyze it). This latter version is known as the DMI-BOS format (T1
test equipment can analyze this format).
Either the AT&T proprietary format or the DMI-BOS format, depending on the circuit
pack configuration, may be used with another System 75 or System 85. The DMI-BOS
format is required to provide 24th-channel signaling capability with other vendors’
digital switches. Common-channel signaling (both methods) are not compatible with
channel banks and multiplexers.
The TN722 circuit pack provides the AT&T proprietary format; the
CAUTIONcircuit pack does not provide DMI-BOS. The TN722B/TN767 circuit
pack may be administered to provide either the proprietary format or
DMI-BOS format.
DMI-BOS
Assigns the DS1 format. Field encodes and their descriptions are:
n AT&T proprietary. This option assumes that common-channel signaling is
selected; otherwise, RBS is used.
y DMI. This option is equivalent to a 1 in field 14 of procedure 260.½
½
½
½
½
ADDENDUM 1 (December 1990) to 555-025-101, Issue 4 
						

							7-132ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 75 R1V5 & GENERIC 1½
½
½
½
Interface ConnectThis field is not available unless the Signaling Mode field is translated isdn-pri.
Field encodes and their descriptions are:
l    network (default option) — implies that the Generic 1 will function as user side
and the switch connects to the ISDN-PRI public network facilities.
l    pbx — implies that a Generic 1 will connect to ISDN-PRI private network
facilities.
l    host — implies that a Generic 1 will function as network side and the switch
connects to a host computer (which is always user side).
This field is not available unless the Connect field is translated pbx. Field encodes
and their descriptions are:
l    user (default option)
l     network
NOTE: For ISDN-PRI private network connections, additional care must be
exercised in defining user and network sides. Specifically, only one end must
be administered user side, while the alternate must be defined as network side.
If the private network node is a tandem switch, then that node may function as
both user side and network side depending on the particular facility.
Maintenance Options or Parameters
SlipThis option enables (y) or disables (n) switching between the primary, secondary, and
Detection
internal high-accuracy clock. The decision to switch from one source to the other is
based on an internal slip count calculation.½
NOTE: Those DS1/T1 facilities that are used to provide the primary and
secondary synchronization reference should be administered for slip detection y.
Typically, those other DS1/T1 spans that are used for data applications and
deemed important should also be administered for slip detection. All T1-spans
connecting channel banks are excluded, unless the channel bank is externally
timed. Normally, those DS1/T1 spans used exclusively for voice and not assigned
as the primary or secondary synchronization source should be administered for slip
detection of n. Refer to the network synchronization diagram to determine which
option to choose.
The digital switch maintains a slip count record for each DS1 Interface. The slip count
is used to determine if the T1-span is experiencing errors and, if so, the severity of the
errors (type alarm). Option y enables switching between the primary, secondary, or
internal high-accuracy clock.
NOTE: If as many as 50% of those spans that are administered for slip detection
are experiencing slips (with respect to the primary), then a decision is made to
switch to the secondary.
Option y is equivalent to a 1 in field 10 of procedure 260.
Remote
Loop
Around
Option y is only used during some phases of DS1/DMI diagnostic testing. The
normal or operational choice is n. Option n is equivalent to a 0 in field 11 of
procedure 260.
ADDENDUM 1 (December 1990) to 555-025-101, Issue 4