==Phrack Magazine== Volume Seven, Issue Forty-Eight, File 9 of 18 --------------------------------------------------------------------------- Information about Northern Telecom's FMT-150B/C/D Written by StaTiC (statik@free.org) --------------------------------------------------------------------------- Ok, I know someone wrote an article in Phrack about the FMT-150B/C/D, but I figured I should write some more. I am not going to write the same info that FyberLyte wrote, in fact I recommend you go and check it out. It is in Phrack #44-13. This is some stuff I obtained, that I figured the rest of the world would be interested in. Included info: Connecting a FMT-150 to a Rockwell OS-35 Connecting Environmental Alarms to the FMT-150 Procomm Script to Perform Configuration of FMT-150 FMT-150 Configuration Checklist Glossary of Terms ------------------------------------------------------------------------------ INSTRUCTIONS FOR X-CONNECTING FMT-150 CUSTOMER OUTPUT TO ROCKWELL OS-35 INPUTS A pin block will be provided at the central office location, in the bay equipped with FMT-150 equipment. The pin block will provide the termination points for the Rockwell OS-35A and the FMT-150 customer output alarms. Each pin block will be able to support a maximum of 16 FMT-150 systems, see pin block diagram. Wiring of the FMT-150 customer outputs points and the OS-35A points will be done by the vender on the back of the pin block. Once a FMT-150 system has been certified the certification team will be responsible for x-connecting the FMT-150 customer output alarm points to the appropriate OS-35A points on the front of the pin block. Completion of this x-connecting will allow FMT-150 system alarms originating either from the CO or the RT to be transported via the OS-35A back to the Lightwave and Radio Alarm Center. IMPORTANT, MBT CERTIFICATION TEAMS X-CONNECT ONLY THE FMT-150 THAT IS BEING PUT INTO SERVICE AND ONLY AFTER THE ELECTRONICS ARE CERTIFIED. The FMT-150 16 customer outputs are defined as follows: OUTPUT ALARM OUTPUT ALARM ------ ----- ------ ----- 1 BAY MAJOR 9 MI3 ALARM #3 2 BAY MINOR 10 HSA ALARM 3 OPT A FAIL 11 HSB ALARM 4 OPT B FAIL 12 DS1 GRP FAIL 5 STX TX 13 SYSTEM ID CLLI 6 STS RX 14 COMM. EQUIP. ALARM 7 M13 ALARM #1 15 NODE #1 CO 8 M13 ALARM #2 16 NODE #2 REMOTE The Rockwell OS-35A provides a total of 32 separate alarm points. The first 16 points with the exception of point 13 have been multiplied on the pin block to provide x-connect points for a total of 16 FMT-150 systems, see pin block diagram. On the pin block x-connect the designated (1 of 16) FMT-150 system customer outputs, pins 1-12 and 14-16 to the appropriate OS-35A pins 1-12 and 14-16, see pin block diagram. Pins 17-32 on the pin block going to the OS-35A will be used for x-connecting the customer output #13 from each FMT-150 system. Customer output #13 provides the system ID for the FMT-150, see pin block diagram. X-CONNECT CUSTOMER OUTPUT #13 FROM FMT-150 SYSTEMS IN THIS SEQUENCE OS-35A FMT-150 System ------ -------------- PIN 17 SYSTEM 1 PIN 18 SYSTEM 2 : : : : PIN 31 SYSTEM 15 PIN 32 SYSTEM 16 AGAIN, WIRE ONLY THE FMT-150 SYSTEM THAT IS BEING PUT INTO SERVICE AND ONLY AFTER CERTIFICATION OF ELECTRONICS HAVE BEEN COMPLETED. After x-connects have been completed on FMT-150 system that has been certified, contact the Alarm Center at (313) 223-9688 and verify that all 16 customer output alarm conditions at both the CO and RT can be activated and are reporting via the OS-35A back to the alarm center. The Lightwave Alarm Center will monitor the FMT-150 system for a 24 hour quiet period for alarms. During this 24 hour period if no alarms are detected by the Lightwave Alarm Center, the FMT-150 will be considered certified for alarming and ready for continual monitoring. If during the 24 hour quiet period the alarm center receives alarms from the FMT-150 system, it will not be certified for continual monitoring and it will be the responsibility of the MBT Certification Teams to resolve those alarms. ---------------------------------------------------------------------------- INSTRUCTIONS FOR CROSS CONNECTING ENVIRONMENTAL ALARMS TO THE FMT-150 INPUTS. Environmental alarms at remote locations may be connected to the FMT-150 customer inputs. If more than one system exists, these alarms should only be connected to the first. Since many remotes will not be equipped with all of these alarms, a checklist has been provided on the system acceptance sheets to indicate which have been wired. The alarms provided for are Smoke Detector, Sump Pump, Open Door, AC Power Fail, HI-LO Temperature, Rectifier Fail, and Battery Float. These are wired to pins D8 through E9 on the FMT-150 backplane. See Shelf Backplane Detail, attached. All Customer Inputs are software connected to Customer Output #12. They will also bring in Bay Minor (Output #1) or Bay Major (Output #2) as appropriate. Inputs #1 (Smoke Detector) and #2 (Sump Pump) are latching inputs that can only be cleared by accessing the MCU with a VT100 terminal. See Section 321-3211-01, DP 3003, page 2. FMT-150 systems using external inputs for environmental alarms and which use E2 telemetry rather than the OS-35 MUST be provided with type NT7H90XH Maintenance Control Units at both ends. External alarm operation and telemetry if equipped, should be verified with the Alarm Center during acceptance. -------------------------------------------------------------------------- Procomm Script for Accessing FMT-150B/C/D ;********************************************************************** ;* * ;* FMT150.CMD Version 5.00 Dec 18, 1990 * ;* Please Destroy all previous versions of this program! * ;* * ;* NOTE: Procomm is a product of Datastorm Technologies * ;********************************************************************** ; ; The script FMT150.CMD was written to automatically perform ; all configuration commands for the Northern Telecom FMT-150 ; fiber optic multiplexer. Specifically, this script will ; complete over 125 configuration commands (performance ; threshold, error correction, and alarm outputs) as outlined ; in Section 4 of the Michigan Bell Certification Procedure for ; the FMT-150. This program is compatible with all ; certification requirements for FMT-150 MCU NT7H90XA or MCU ; NT7H90XE. ; ; Requirements: ; 1) Toshiba T1000 craft terminal or DOS equivalent. ; 2) Proper serial cables and adapters. ; 3) Procomm disk with FMT150.CMD file. ; ; Procedure for use: ; 1) Remove disk from drive, then turn on computer. When the DOS ; prompt appears insert the PROCOMM disk into disk drive. ; Enter the command "A:" + . ; 2) Enter the command "FIXPRN" + . ; 3) Enter the command "PROCOMM" + . ; 4) While holding the key down, press the key, ; and select FMT-150 from the dialing menu. ; 5) Gain access to MCU as normal (press the key 3 times). ; 6) Once logged in, reset the MCU to factory default by ; entering "M"(aintenance) "R"(eset) "*"(all) + . ; It will take approximately three minutes to reconfigure. ; 7) Gain access to MCU again as in steps 3) & 4). ; 8) Select the script by pressing keys simultaneously. ; 9) When prompted for command file enter "FMT150" + . ; 10) Answer questions and away you go! ; ; HISTORY: Version 4.00 May 15, 1990 by AQW final release version ; HISTORY: Version 4.10 Aug 08, 1990 by JBH mod to use VPRINT to divert ; printer into a better bit bucket, and to correct callback #. ; HISTORY: Version 4.12 Nov 21, 1990 by EEE to use Customer Inputs ; HISTORY: Version 5.00 Dec 18, 1990 by JBH to update documentation ;SN051690000 ;REFNO=5.00 CLEAR PAUSE 1 ALARM 1 MESSAGE " " MESSAGE " *************************************************" MESSAGE " * *" MESSAGE " * FMT-150 MCU NT7H90XC\CA CONFIGURATION PROGRAM *" MESSAGE " * MCU NT7H90XE\EA CONFIGURATION PROGRAM *" MESSAGE " * *" MESSAGE " * VERSION 5.00 DEC 18, 1990 *" MESSAGE " * *" MESSAGE " * MICHIGAN BELL TELEPHONE COMPANY *" MESSAGE " * A DIVISION OF AMERITECH *" MESSAGE " * *" MESSAGE " * *" MESSAGE " *************************************************" MESSAGE " " MESSAGE " " MESSAGE " ....TO EXIT THIS PROGRAM AT ANY TIME, PRESS ...." PAUSE 3 ALARM 1 ;VARIABLE DOCUMENTATION ;S0=CLLI A USER INPUT ;S1=CLLI B USER INPUT ;S2=CLLI LOCAL USER INPUT ;S3=YEAR 2 DIGIT USER INPUT ;S4=MONTH 2 DIGIT USER INPUT ;S5=DAY 2 DIGIT USER INPUT ;S6=HOUR 2 DIGIT USER INPUT ;S7=MINUTE 2 DIGIT USER INPUT ;S8=SYSTEM ID & USER RESPONSE USED TO CONTROL PROGRAM FLOW ;S9=SYSTEM NUMBER LABEL1: ; note the following statement was superseded in version 4.10 by VPRINT ;DOS "MODE LPT1:=COM2:" ; REQUIRED TO TURN PRINTER ERROR OFF ; following flushes the "RUB" buffer TRANSMIT "^H^H^H^H^H^H^H^H^H^H^H^H^H^H^H^H^H^H^H^H" CLEAR LOCATE 10,2 MESSAGE "Enter CLLI code for LOCATION A (C.O.) using full 8 or 11 characters:" LOCATE 12,2 GET S0 11 ;CLLI A MESSAGE " " CLEAR LOCATE 10,2 MESSAGE "Enter CLLI code for LOCATION B (REMOTE) using full 8 or 11 characters:" LOCATE 12,2 GET S1 11 ;CLLI B MESSAGE " " CLEAR LOCATE 10,2 MESSAGE "Enter CLLI code for YOUR location using full 8 or 11 characters:" LOCATE 12,2 GET S2 11 CLEAR LOCATE 8,2 MESSAGE "Enter system ID without 'MI', for example ALBNMN-JCSNMN." LOCATE 10,2 GET S8 13 LOCATE 13,2 MESSAGE "Enter system number, for example 1201 / T3X." LOCATE 15,2 GET S9 15 TRANSMIT "CGNS" TRANSMIT "`"" TRANSMIT S8 TRANSMIT "`"" TRANSMIT "!" CLEAR LOCATE 6,2 MESSAGE "Enter today's date." LOCATE 8,2 MESSAGE "Enter two digit year + " LOCATE 8,34 GET S3 2 ; 2 DIGIT YEAR LOCATE 10,2 MESSAGE "Enter two digit month + . Use 0's if required." LOCATE 10,58 GET S4 2 ; 2 DIGIT MONTH LOCATE 12,2 MESSAGE "Enter two digit day + . Use 0's if required." LOCATE 12,56 GET S5 2 ; 2 DIGIT DAY CLEAR LOCATE 6,2 MESSAGE "Enter time." LOCATE 8,2 MESSAGE "Enter two digit hour + . Use 0's if required." LOCATE 8,57 GET S6 2 ; 2 DIGIT HOUR LOCATE 10,2 MESSAGE "Enter two digit minute + . Use 0's if required." LOCATE 10,59 GET S7 2 ; 2 DIGIT MINUTE CLEAR ;SET TIME DP3025 TRANSMIT "CT" TRANSMIT S6 TRANSMIT " " TRANSMIT S7 TRANSMIT " !" PAUSE 1 KFLUSH RFLUSH CLEAR ;PROMPT THE USER TO CHECK INPUTS FOR LOCATIONS LOCATE 1,2 MESSAGE "Please verify the following information." LOCATE 4,2 MESSAGE "LOCATION A CLLI CODE = " LOCATE 4,26 MESSAGE S0 LOCATE 6,2 MESSAGE "LOCATION B CLLI CODE = " LOCATE 6,26 MESSAGE S1 LOCATE 8,2 MESSAGE "LOCAL LOCATION CLLI CODE =" LOCATE 8,29 MESSAGE S2 LOCATE 10,2 MESSAGE "SYSTEM ID = " LOCATE 10,17 MESSAGE S8 LOCATE 12,2 MESSAGE "SYSTEM NUMBER = " LOCATE 12,21 MESSAGE S9 LOCATE 17,2 MESSAGE "IS INFORMATION CORRECT? Y/N + " LOCATE 17,44 GET S8 1 SWITCH S8 CASE "Y" ;DO NOTHING ENDCASE DEFAULT GOTO LABEL1 ; JUMP TO TOP AND ENTER INFORMATION AGAIN ENDCASE ENDSWITCH CLEAR LOCATE 8,15 MESSAGE "DO NOT PRESS ANY KEYS UNTIL CONFIGURATION COMPLETE" LOCATE 10,15 MESSAGE "OK...HERE WE GO..." ALARM 1 PAUSE 2 ;SET DATE DP3024 TRANSMIT "CD" TRANSMIT S3 TRANSMIT " " TRANSMIT S4 TRANSMIT " " TRANSMIT S5 TRANSMIT " !" PAUSE 1 ;NAME NODE 1 USING CENTRAL OFFICE CLLI CODE TRANSMIT "CGNN1 " TRANSMIT "`"" TRANSMIT S0 TRANSMIT "`"" TRANSMIT "!" ;NAME NODE 2 USING REMOTE CLLI CODE TRANSMIT "CGNN2 " TRANSMIT "`"" TRANSMIT S1 TRANSMIT "`"" TRANSMIT "!" ;DEFINE SITE TRANSMIT "CGS1 1 2 !" ;TRANSMIT "`"" ;TRANSMIT S0 ;TRANSMIT "`"" ;TRANSMIT S1 ;TRANSMIT " " ;TRANSMIT "!" ;CONFIGURE CUSTOMER OUTPUT POINTS DP3013 TRANSMIT "CGNO1 " TRANSMIT "`"BAY MINOR`"" TRANSMIT "!" TRANSMIT "CGNO2 " TRANSMIT "`"BAY MAJOR`"" TRANSMIT "!" TRANSMIT "CGNO3 " TRANSMIT "`"OPT A FAIL`"" TRANSMIT "!" TRANSMIT "CGNO4 " TRANSMIT "`"OPT B FAIL`"" TRANSMIT "!" TRANSMIT "CGNO5 " TRANSMIT "`"STX TX`"" TRANSMIT "!" TRANSMIT "CGNO6 " TRANSMIT "`"STX RX`"" TRANSMIT "!" TRANSMIT "CGNO7 " TRANSMIT "`"M13 ALARM #1`"" TRANSMIT "!" TRANSMIT "CGNO8 " TRANSMIT "`"M13 ALARM #2`"" TRANSMIT "!" TRANSMIT "CGNO9 " TRANSMIT "`"M13 ALARM #3`"" TRANSMIT "!" TRANSMIT "CGNO10 " TRANSMIT "`"HSA ALARM`"" TRANSMIT "!" TRANSMIT "CGNO11 " TRANSMIT "`"HSB ALARM`"" TRANSMIT "!" ;TRANSMIT "CGNO12 " ;TRANSMIT "`"DS1 GRP FAIL`"" ;TRANSMIT "!" TRANSMIT "CGNO13 " TRANSMIT "`"" TRANSMIT S9 TRANSMIT "`"" TRANSMIT "!" TRANSMIT "CGNO14 " TRANSMIT "`"COM EQUIP ALRM`"" TRANSMIT "!" TRANSMIT "CGNO15 " TRANSMIT "`"NODE #1 CO`"" TRANSMIT "!" TRANSMIT "CGNO16 " TRANSMIT "`"NODE #2 REMOTE`"" TRANSMIT "!" ;DELETE ALL EXISTING CUSTOMER OUTPUTS TRANSMIT "CGO1 D*!" TRANSMIT "CGO2 D*!" TRANSMIT "CGO3 D*!" TRANSMIT "CGO4 D*!" TRANSMIT "CGO5 D*!" TRANSMIT "CGO6 D*!" TRANSMIT "CGO7 D*!" TRANSMIT "CGO8 D*!" TRANSMIT "CGO9 D*!" TRANSMIT "CGO10 D*!" TRANSMIT "CGO11 D*!" TRANSMIT "CGO12 D*!" TRANSMIT "CGO13 D*!" TRANSMIT "CGO14 D*!" TRANSMIT "CGO15 D*!" TRANSMIT "CGO16 D*!" ;CUSTOMER OUTPUTS 1-2 TRANSMIT "CGO1 AS1 G100 !" TRANSMIT "CGO2 AS1 G120 !" ;CUSTOMER OUTPUTS 3-9 TRANSMIT "CGO3 AS1 G107 !" TRANSMIT "CGO4 AS1 G108 !" TRANSMIT "CGO5 AS1 G101 !" TRANSMIT "CGO5 AS1 G102 !" TRANSMIT "CGO5 AS1 G103 !" TRANSMIT "CGO6 AS1 G104 !" TRANSMIT "CGO6 AS1 G105 !" TRANSMIT "CGO6 AS1 G106 !" TRANSMIT "CGO7 AS1 G109 !" TRANSMIT "CGO8 AS1 G110 !" TRANSMIT "CGO9 AS1 G111 !" ;CUSTOMER OUTPUTS 10-11 TRANSMIT "CGO10 AS1 M1 MH18 !" TRANSMIT "CGO10 AS1 M2 MH18 !" TRANSMIT "CGO10 AS1 M3 MH18 !" TRANSMIT "CGO11 AS1 M1 MH19 !" TRANSMIT "CGO11 AS1 M2 MH19 !" TRANSMIT "CGO11 AS1 M3 MH19 !" ;TRANSMIT "CGO12 AS1 M1 1H2 !" ;TRANSMIT "CGO12 AS1 M2 1H2 !" ;TRANSMIT "CGO12 AS1 M3 1H2 !" ;TRANSMIT "CGO12 AS1 M1 1H3 !" ;TRANSMIT "CGO12 AS1 M2 1H3 !" ;TRANSMIT "CGO12 AS1 M3 1H3 !" ;CUSTOMER OUTPUT 13, 14 TRANSMIT "CGO13 AS1 G100 !" TRANSMIT "CGO13 AS1 G120 !" TRANSMIT "CGO14 AS1 G112 !" ;CUSTOMER OUTPUTS 15, 16 TRANSMIT "CGO15 AN1 G100 !" TRANSMIT "CGO15 AN1 G120 !" TRANSMIT "CGO16 AN2 G100 !" TRANSMIT "CGO16 AN2 G120 !" ;SET TO AUTOMATIC CONTROL TRANSMIT "CGO1 CA!" TRANSMIT "CGO2 CA!" TRANSMIT "CGO3 CA!" TRANSMIT "CGO4 CA!" TRANSMIT "CGO5 CA!" TRANSMIT "CGO6 CA!" TRANSMIT "CGO7 CA!" TRANSMIT "CGO8 CA!" TRANSMIT "CGO9 CA!" TRANSMIT "CGO10 CA!" TRANSMIT "CGO11 CA!" TRANSMIT "CGO12 CA!" TRANSMIT "CGO13 CA!" TRANSMIT "CGO14 CA!" TRANSMIT "CGO15 CA!" TRANSMIT "CGO16 CA!" ; ;DEFINE CUSTOMER OUTPUT 12 TRANSMIT "CGO12 D*!" TRANSMIT "CGNO12 " TRANSMIT "`"EXT ALM`"" TRANSMIT "!" TRANSMIT "CGO12 AN2 G118 !" ;also attach to pt 13 for alarm center ID TRANSMIT "CGO13 AN2 G118 !" ; ;DEFINE CUSTOMER INPUTS TRANSMIT "CGNI1 " TRANSMIT "`"SMOKE DET.`"" TRANSMIT "!" TRANSMIT "CGNI2 " TRANSMIT "`"SUMP PUMP`"" TRANSMIT "!" TRANSMIT "CGNI3 " TRANSMIT "`"OPEN DOOR`"" TRANSMIT "!" TRANSMIT "CGNI4 " TRANSMIT "`"AC PWR FAIL`"" TRANSMIT "!" TRANSMIT "CGNI5 " TRANSMIT "`"HI-LO TEMP`"" TRANSMIT "!" TRANSMIT "CGNI6 " TRANSMIT "`"RECT. FAIL`"" TRANSMIT "!" TRANSMIT "CGNI7 " TRANSMIT "`"BATT FLOAT`"" TRANSMIT "!" ; ;ADD CONDITIONS TO CUSTOMER OUTPUT 1 TRANSMIT "CGO1 AN2 SS5 !" TRANSMIT "CGO1 AN2 SS6 !" TRANSMIT "CGO1 AN2 SS7 !" ; ;ADD CONDITIONS TO CUSTOMER OUTPUT 2 TRANSMIT "CGO2 AN2 SS1 !" TRANSMIT "CGO2 AN2 SS2 !" TRANSMIT "CGO2 AN2 SS3 !" TRANSMIT "CGO2 AN2 SS4 !" ; ;PER JOE OLSZTYN SWITCHING SYSTEMS STAFF ;LEAVE PERFORMANCE MONITORING AT FACTORY DEFAULT ;DISABLE BLUE INSERTION FOR POINT TO POINT SYSTEMS ;IN A MULTIPOINT SYSTEM BLUE INSERTION SHOULD BE ENABLED. ;ENABLE ALARM LOGGER TRANSMIT "CAD!" ;DISABLE BLUE INSERTION NODE 1 DP3019 TRANSMIT "CN1 T1 BE!" TRANSMIT "CN1 T2 BE!" TRANSMIT "CN1 T3 BE!" ;ENABLE PARITY CORRECTION NODE 1 DP3020 TRANSMIT "CN1 T1 PE!" TRANSMIT "CN1 T2 PE!" TRANSMIT "CN1 T3 PE!" ;ENABLE RX OVERHEAD NODE 1 DP3021 TRANSMIT "CN1 T1 RE!" TRANSMIT "CN1 T2 RE!" TRANSMIT "CN1 T3 RE!" ;ENABLE TX OVERHEAD NODE 1 DP3022 TRANSMIT "CN1 T1 TE!" TRANSMIT "CN1 T2 TE!" TRANSMIT "CN1 T3 TE!" ;SIGNAL DEGRADE 10E-8 NODE 1 DP3158 TRANSMIT "CN1 T1 S8!" TRANSMIT "CN1 T2 S8!" TRANSMIT "CN1 T3 S8!" ;DISABLE BLUE INSERTION NODE 2 DP3019 TRANSMIT "CN2 T1 BE!" TRANSMIT "CN2 T2 BE!" TRANSMIT "CN2 T3 BE!" ;ENABLE PARITY CORRECTION NODE 2 DP3020 TRANSMIT "CN2 T1 PE!" TRANSMIT "CN2 T2 PE!" TRANSMIT "CN2 T3 PE!" ;ENABLE RX OVERHEAD NODE 2 DP3021 TRANSMIT "CN2 T1 RE!" TRANSMIT "CN2 T2 RE!" TRANSMIT "CN2 T3 RE!" ;ENABLE TX OVERHEAD NODE 2 DP3022 TRANSMIT "CN2 T1 TE!" TRANSMIT "CN2 T2 TE!" TRANSMIT "CN2 T3 TE!" ;SIGNAL DEGRADE 10E-8 NODE 2 DP3158 TRANSMIT "CN2 T1 S8!" TRANSMIT "CN2 T2 S8!" TRANSMIT "CN2 T3 S8!" ;LINE LEARN ALL MULTIPLEXERS BOTH NODES TRANSMIT "CN1 M1 L!" TRANSMIT "CN1 M2 L!" TRANSMIT "CN1 M3 L!" TRANSMIT "CN2 M1 L!" TRANSMIT "CN2 M2 L!" TRANSMIT "CN2 M3 L!" ;CONFIGURATION IS COMPLETE EXIT THE PROGRAM CLEAR ALARM 1 LOCATE 10,20 MESSAGE "......CONFIGURATION COMPLETE......" LOCATE 14,17 MESSAGE "CONTINUE WITH SECTION 5 OF CERTIFICATION" ALARM 2 PAUSE 5 EXIT ---------------------------------------------------------------------------- Glossary of Terms 4W Four Wire ACO Alarm Cut-Off ACTV Active (module -- carrying traffic) AGC Automatic Gain Control AIS Alarm Indication Signal -- indicates an alarm upstream AMI Alternate Mark Inversion -- a technique by which the polarity of alternate pulses is inverted APD Avalanche Photo Diode -- used for detecting pulses of light at the receive end of an optical fiber AUD Audible alarm BDF Battery Distribution Frame BER Bit Error Rate BIP Bit Interleave Parity BPV Bipolar Violation -- signal is not alternating as expected CAMMS Centralized Access Maintenance and Monitoring System -- a bay-mounted shelf with push buttons and an luminescent display, which is used to control FMT-150 networks, as well as other Northern Telecom transmission equipment CDP Centralized Display Panel CEV Controlled Environment Vault CO Central Office CPC Common Product Code -- a Northern Telecom code used to identify equipment DDD Direct Distance Dialing DM-13 Digital Multiplexer which multiplexes between DS-1/1C/2 signals and DS-3 signals DNA Dynamic Network Architecture E2A A serial interface for alarm polling of equipment FE Frame Error FER Frame Error Rate FL Frame Loss FLC Frame Loss Counter FLS Frame Loss Seconds FPD Future Product to be Developed Group A multiplexed signal made up of four DS-1s, two DS-1Cs, or one Ds-2 Hub An FMT-150 site which branches one 150 Mb/s signal into two or three signals, in different directions, without sacrificing OA & M continuity LBR Loopback Request MCU Maintenance Control Unit MM Multimode Optical Fiber MSB Most Significant Bit Muldem Multiplexer/demultiplexer NRZ Non-Return to Zero OTT Optical Termination Tray PEC Product Engineering Code -- a Norther Telecom code used to identify equipment. The preferred code to be used when ordering Northern Telecom equipment. PER Parity Error Rate PES Parity Error Seconds RTO Ready To Order SCU Service Channel Unit SMB Sub-Miniature BNC type connector SR Stuff Request STX (Pseudo) Synchronous Transport Signal: First Level at 49.92 Mb/s (Northern Telecom) TBOS Telemetry Byte Oriented System VIS Visual Alarm WDM Wavelength Division Multiplexing XOW Express Orderwire