Mike's PBX Cookbook

T-1 Installation Instructions

Introduction:

Note, if using a Universal Digital Trunk (UDT) card, see UDT T1 DTI Example.

A 1.5MB DTI/PRI (TMDI or T-1) card, with a clock controller in place to reference timing, is required. These items will generally be supplied before installation. A clock controller daughterboard is only supplied for systems that do not have a clocking source readily available. Note, the clock controller is only used as a reference for the T-1 card and WILL NOT be used as a primary or secondary source of reference for channel timing.

The following systems require the listed equipment prior to installation:

SystemPart #Description
11C
(small systems)
NTRB21TMDI Card (PBX to Network)
NTAK20Clock Controller Daughterboard
NTBK04 (optional)DTI/PRI to Carrier Cable
51C, 61C, and 81C
(large systems)
NT5D12Dual DTI/PRI Card
NT5D16Dual DTI/PRI to I/O Panel Cable
NTCG03DTI/PRI to Clock Controller Cable

Setup Preparation:

In order to make this a successful implementation, make sure your plan of action includes consideration for the appropriate card slot used in your application, and the correct connections to the T-1 card (via BIX or cable connection). Ensure you have the appropriate packages required for the setup and note any and all programming under loads 14, 16, 32, 60, 73, and 96. These loads will be vital to programming the card as needed.

First, log into your system and STAT the proposed slot for the setup in LD 32 to make sure the slot is unequipped. Next, you will need to print out your digital data block (DDB) in LD 73 and note the clock controller and threshold settings prior to making any changes. Getting a printout of all programming detailing this T-1 installation is vital just in case you have to backtrack to double-check anything in particular.

Note, in building the T-1 in the system, always build the card necessary before cutting over the system for testing and modifying prior to going live.

Programming Steps:

In the following tables, the 51C steps also apply to Options 61C, and 81C. Option 11 steps apply to the Option 11 only.

The first step Is to change or build your digital data block (this may exist, so print first to check).

➤ LD 73 - Digital Data Block

PromptResponseDescription
REQNEW, CHG, PRT, OUTAction request
TYPEDDBDigital data block
TRSH0-15Threshold set. Enter this number in LD 17 when defining a DTI/PRI loop. X remove
RALM1-(3)-12824-hour Remote (yellow) Alarm clear threshold: the number of "remote alarm clear" signals received in 24 hours. If the threshold is reached the DTI/PRI must be restored to service manually
BIPC0-(2)-12824-hour bit rate violation threshold
LFAC0-(3)-12824-hour loss of frame alignment threshold
BIPVxx yyBit rate violation maintenance (in 24 hours) and out-of-service threshold (per hour)
xx = 1-(3)-4 (maint)
yy = 1-(2)-4 (OOS)
SRTKxx yySlip rate maintenance (in 24 hours) and out-of-service threshold (per hour)
xx = 1-(5)-24 (maint)
yy = 1-(30)-3600 (OOS)
SRNTxx yyNon-tracking slip rate maintenance and out-of-service thresholds
xx = 1-(15)-1024 (maint)
yy = 1-(3)-1024 (OOS)
LFAL Loss of frame alignment limits: maintenance and out of service
xx = 1-(17)-10240 (maint)
yy = 1-(511)-10240 (OOS)
SRIM(1)-127Slip rate improvement time in minutes
SRMM1-(2)-127Slip rate exceeded maintenance limit

Build the digital loop in order to program the trunks on later.

➤ LD 17 - Digital Loop

PromptResponseDescription
REQCHG, ENDChange data or terminate program
TYPECEQUCommon Equipment parameters
DLOPL N FFMTDigital trunk loop, and options.
L = loop number (0-159)
N = number of data channels (0-(24))
FFMT = desired framing format (D2, (D3), D4, or ESF)
MG_CARDL S CThe physical card slot (loop, shelf, card). Only prompted with Media Gateways. Use the DLOP 'virtual loop' number to build the trunks.
MODETRK, LNK, PRIDigital trunk loop mode of operation
TMDI(YES), NOTMDI Card (Mode must be set to PRI or TRK). Option 11 only - Check slot first
xx = 1-(5)-24 (maint)
yy = 1-(30)-3600 (OOS)
LCMTAMI, B8SLine code method
B8s = B8ZS binary 8 zero code substitution (default for FFMT = ESF)
AMI = B7 zero substitution (default for FFMT = D2, D3, or D4)
YALMDG2, FDLYellow alarm method
DG2 = Digit 2 (default for FFMT = D2, D3, or D4)
FDL = Facility Data Link (default for FFMT = ESF)
TRSH0-99Digital Trunk threshold set defined in LD 73
DTIC0, 4, 8,...156Starting network loops slot for DTI/PRI

Next, make sure the daily routines are set to check the clock status by adding LD 60 in the daily routines (if it is not there already).

➤ LD 17 - Daily Routine

PromptResponseDescription
REQCHG, ENDChane data or terminate program
TYPEOVLYOverlay area options
DROLxx xx xx xxDaily routine overlays

Add a clock reference for background timing in order to run the card. This will not require a clock number due to the fact that there will be no primary clocking source for the T-1 card. This is strictly set to 'Free Run' to provide the timing necessary.

➤ LD 73 - Clock Reference

PromptResponseDescription
REQCHG, ENDAction request
TYPEDDBDigital data block
PREF0 - 159Primary referece for clock *
SREF0 - 159Secondary reference for clock *
CLKN1 - 9Card number for clock daughterboard
(Option 11 before Rls 25)
CC0xx = card number of clock controller daughterboard, Cabinet 0 ***
PREFCC0 1 - 9Card number of primary DTI/PRI clock reference for Cabinet 0 ***
SREFCC0 1 - 9Card number of primary DTI/PRI clock reference for Cabinet 0 ***
CC1 x = card number of clock controller daughterboard, Cabinet 1 ***
PREFCC1 1 - 9Card number of primary DTI/PRI clock reference for Cabinet 1 ***
SREFCC1 1 - 9Card number of primary DTI/PRI clock reference for Cabinet 1 ***

This would be a good time to swing over to LD 43 and perform a data dump to back up any information that you have so far.

Add a route prior to building trunks in the system.

➤ LD 16 - Route Data Block

PromptResponseDescription
REQNEW, CHG, LCHG, ENDAction request
TYPERDBRoute data block
CUST0 - 99Customer number
ROUT0 - 511Route number
DESxxxxDesignator
TKTPCOT, DID, FEX, TIE, WATTrunk route type
DTRKYes, (No)Digital trunk route
DGTPDTI, DTI2, PRI, PRI2Digital trunk type
DSELDTA, VCE, TDN, (VOD), 3VCE, 3DTAData only, voice only, transparent data network only, voice and data route (VOD adds a 1 for voice calls and a 2 for data calls to the dialed digits). Use 3VCE for voice and data/fax applications.
ICOGIAO, ICT, OGTIncoming and/or outgoing trunk
SRCHRRB, (LIN)Linear, round robin search for outgoing calls
ACODxxxxTrunk route access code
TARGxxxxTrunk access restriction group
CNTLYes, (No)Change controls or timers
NEDC(ORG), ETHNear end disconnect control
ORG = Originating end
ETH = Either end
FEDC(ORG), ETH, FEC, JNTFar end disconnect control, ORG = Originating end, ETH = Either end
FEC = Far end, JNT = Joint control, JNT disallows trunk to trunk connections
DLTNYes, (No)Provide dialtone to the far-end

 

➤ LD 14 - Trunk Data Block

PromptResponseDescription
REQNEW x, CHG, LCHG, ENDAction request. Add multiple trunks by using the NEW x (replacing x with the number of trunks to build, eg: 24).
TYPECOT, DID, FEX, TIE, WATTrunk type
COT = Central Office trunk
DID = Direct Inward Dialing
FEX = Foreign Exchange
TIE = Tie trunk
WAT = WATS trunk
TNl s c u
l ch
Terminal number (loop, shelf, card, unit) - Large System.
Loop (DLOP) and channel (1 - 24) for digital trunks/Media Gateways.
DESxxxxDesignator
RTMB0 - 511, 1 - 254Route member number
INC(YES), NOIncrease channel number and decreasing member number. (Option 11 only)
SIGLDX2, DX4, EAM, EM4, LDRDigital trunk type
DX2 = 2-wire duplex
DX4 = 4-wire duplex
EAM = 2-wire E&M
EM4 = 4-wire E&M
LDR = loop dial repeating
EMTYTTY1, (TTY2)4-wire E&M type 1 or 2
STRIDDL, IMM, OWK, WNKIncoming start arrangement
DDL = delayed dial
IMM = immediate dial
OWK = off hook fast flash
WNK = fast flash
STRODDL, IMM, OWK, WNKOutgoing start arrangement
DDL = delayed dial
IMM = immediate dial
OWK = off hook fast flash
WNK = fast flash
SUPNYES, (NO)Answer and disconnect supervision
CLSxxxxClass-of-service

Making the Terminations:

There is a manufacturer cable (NTBK04) fabricated for a direct connection to the Network system. If this cable is not available, you may have to make the termination directly on the MDF block associated with the card slot. If so, use the following pinouts:

Cable
Patching
Violet/Greenpair 23Transmit (TX)
- to network
TIP 0pin 48MDF/BIX
 Pair 23
Green/VioletRING 0pin 23
Violet/Brownpair 24Receive (RX)
- from network
TIP 1pin 49MDF/BIX
 Pair 24
Brown/VioletRING 1pin 24
Slate/VioletFrame GroundFGNDpin 25Not Used

See Connecting E1 / T1's for cabling details.

General Maintenance:

Once the above is completed, go to LD 43 and perform a data dump. Next, start the indicated tasks in order to test and/or bring the circuit online:

Perform a data dump

>LD 43
.EDD
or
.EDD CLR   Do this step if the system does not take EDD alone

Identify the new trunk members built on the system

>LD 21
REQ:  LTM
CUST  0
ROUT  #    or CR

Print the Digital Data Block to check threshold and clocking

>LD 73
REQ    PRT
TYPE   DDB

>LD 60
.SSCK #   For the Option 11, you should see a Free Run status for CC0

Print the routes to follow up on programming

>LD 21
REQ:  PRT
TYPE: RDB
CUST   0
ROUT  xx   Route number built for TMDI trunk access

>LD 20
REQ:  PRT
TYPE: TIE
TN    loop channel   loop or loop and channel

Enable the TMDI card built in the system (Option 11 only)

>LD 96
.ENL TMDI x
.STAT TMDI x

Loop Status

>LD 60
.STAT
.DISL x   Disable loop, may be required to bring card online prior to enabling
.ENLL x   Enable loop
.STAT x   Check loop status
.RCNT x   Reset alarm counters