Appendix A, Acronyms


A
ACO	Alarm Cutoff
ACT/STBY	Active/Standby
ADM	Add-Drop Multiplex
AIC	Alarm Interface Controller
AID	Access Identifier
AIS	Alarm Indication Signal
AIS-L	Line Alarm Indication Signal
AMI	Alternate Mark Inversion
ANSI	American National Standards Institute
APS	Automatic Protection Switching
ARP	Address Resolution Protocol
ATAG	Autonomous Message Tag
ATM	Asynchronous Transfer Mode
AWG	American Wire Gauge


B
B8ZS	Bipolar 8 Zero Substitution
BER	Bit Error Rate
BIC	Backplane Interface Connector
BIP	Bit Interleaved Parity
BITS	Building Integrated Timing Supply
BLSR	Bidirectional Line Switched Ring
BML	Business Management Layer
BNC	Bayonet Neill-Concelman (coaxial cable bayonet locking connector)
BPDU	Bridge Protocol Data Unit
BTC	Bridging Transmission Convergence ASIC


C
CAT 5	Category 5 (cabling)
CCITT	Consultative Committee International Telegraph and Telephone (France)
CEO	Central Office Environment
CEV	Controlled Environment Vaults
CLEI	Common Language Equipment Identification
CLNP	Correctionless Network Protocol
CMIP	Common Management Information Protocol
CMS	Cerent Management System (now CTC)
cm	centimeter
COE	Central Office Environment
CORBA	Common Object Request Broker Architecture
CPE	Customer Premise Environments
CTAG	Correlation Tag
CTC	Cisco Transport Controller


D
DCC	Data Communications Channel
DCN	Data Communications Network
DCS	Distributed Communications System
DIN	Deutsche Institut fur Normung (German Institute for Standardization)
DRAM	Dynamic Random Access Memory
DS-1	Digital Signal Level One
DS-3	Digital Signal Level Three
DS1-14	Digital Signal Level One (14 ports)
DS1N-14	Digital Signal Level One (N-14 ports)
DS3-12	Digital Signal Level Three (12 ports)
DS3N-12	Digital Signal Level Three (N-12 ports)
DS3XM-6	Digital Service Level 3 Trans Multiplexer (6 ports)
DSX	Digital Signal Cross Connect frame
DWDM	Dense wavelength division multiplexing


E
EDFA	Erbium Doped Fiber Amplifier
EEE	Electronic Equipment Enclosures
EFI	Engineer furnish and install
EFT	Electrical Fast Transient/Burst
EIA	Electrical Interface Assemblies
ELR	Extended Long Reach
EMI	Electromagnetic interface
EML	Element Management Layer
EMS	Element Management System
EOW	Express Orderwire
ESD	Electrostatic Discharge
ESF	Extended Super Frame
ETSI	European Telecommunications Standards Institute


F
FCC	Federal Communications Commission
FCD	Frame Check Sequence
FDDI	Fiber Distributed Data Interface
FG1	Frame Ground #1(pins are labeled "FG1," "FG2," etc.)
FSB	Field Service Bulletin


G
Gbps	Gigabits per second
GB	Gigabyte
GBps	Gigabytes per second
GBIC	Gigabit Interface Converter
GHz	gigahertz
GR-253-CORE	General Requirements #253 Council Of Registrars
GR-1089	General Requirements #1089
GTL	Gunning Transistor Logic
GUI	Graphical User Interface


I
ID	Identifier
IF	Intermediate frequency
IEC	InterExchange Carrier
IEEE	Institute of Electrical and Electronics Engineers
IETF	Internet Engineering Task Force
I/O	Input/Output
IP	Internet Protocol
IR	Intermediate reach
ITU-T	International Telephone Union- Telecommunication Standards Sector

J
JRE	Java Runtime Environment


L
LAN	Local Area Network
LCD	Liquid Crystal Display
LDCC	Line Data Communications Channel
LOP	Loss of Pointer
LOS	Loss of Service
LOF	Loss of Frame
LOW	Local Orderwire
LTE	Line Terminating Equipment
LVDS	Low Voltage Differential Signal


M
MAC	Media Access Control
Mbps	Million bits per second, or Million bytes per second
Mhz	Megahertz
MIB	Management Information Bases
MIC	Mechanical Interface card
MIME	Multipurpose Internet Mail Extensions
Mux/Demux	Multiplexer/Demultiplexer


N
N	Any digit
NE	Network Element
NEL	Network Element Layer
NEBS	Network Equipment-Building Systems
NML	Network Management Layer
NMS	Network Management System


O
OAM&P	Operations, Administration, Maintenance, and Provisioning
OC	Optical Carrier
OC-3	Optical Carrier Level Three
OC-12	Optical Carrier Level 12
OC-48	Optical Carrier Level 48
OOS AS	Out of Service Assigned
OS	Operating System
OSI	Open Systems Interconnection
OSPF	Open Shortest Path First
OSS	Operations Support System
OSS/NMS	Operations Support System/Network Management System


P
P	Protection
PC	Personal Computer
PCM	Pulse Code Modulation
PCMCIA	Personal Computer Memory Card International Association
PCN	Product Change Notices
PDI-P	STS Payload Defect Indication-Path
PMP	Point to Multipoint
POP	Point of Presence
PPMN	Path Protected Mesh Network
PSA	Product Specification Agreement


R
RAM	Random Access Memory
RDI-L	Remote Defect Indication Line
RES	Reserved
RJ45	Registered Jack #45 (8 pin)
RMA	Return Material Authorization
RMON	Remote Network Monitoring
RS232	Recommended Standard #232 (ANSI Electrical Interface for Serial Communication
Rx	Receive


S
SCI	Serial Communication Interface
SCL	System Communications Link
SDBER	Signal Degrade Bit Error Rate
SDCC	Section Data Communications Channel
SDH/SONET	Synchronous Digital Hierarchy/Synchronous Optical Network
SELV	Safety Extra Low Voltage
SF	Super Frame
SFBER	Signal Failure Bit Error Rate
SML	Service Management Layer
SMF	Single-Mode Fiber
SNMP	Simple Network Management Protocol
SNTP	Simple Network Time Protocol
SONET	Synchronous Optical Network
SPE	Synchronous Payload Envelope
SSM	Synchronous Status Messaging
STA	Spanning Tree Algorithm
STP	Shielded Twisted Pair
STS-1	Synchronous Transport Signal Level 1
SWS	SONET WAN Switch
SXC	SONET Cross Connect ASIC


T
TAC	Technical Assistance Center
TBOS	Telemetry Byte Oriented Serial protocol
TCC	Timing Communications and Control Card (Cisco ONS 15454)
TCP/IP	Transmission Control Protocol/Internet Protocol
TDM	Time Division Multiplex
TDS	Time Division Switching
TID	Target Identifier
TL1	Transaction Language 1
TLS	Transparent LAN service
TM	Terminal Mode
TMN	Telecommunications Management Network
TSA	TIme Slot Assignment
TSI	Time-Slot Interchange
Tx	Transmit


U
UTC	Universal Time Coordinated
UDP/IP	User Datagram Protocol/Internet Protocol
UID	User Identifier
UL	Underwriter's Laboratories
UPSR	Unidirectional Path Switched Ring
UTP	Unshielded Twisted Pair


V
VDC	Volts Direct Current
VLAN	Virtual Local Area Network
VPN	Virtual Private Network
VT1.5	Virtual Tributary equals 1.544 megabits per second


X
XCON	Cross-Connect Card (pronounced "Ex-Con")
XC	Cross Connect
XCVT	Cross Connect Virtual Tributary
XTC	Integrated Cross-Connect, Timing, and Control card
X.25	Protocol providing devices with direct connection to a packet switched network


Numerics
10BaseT	standard 10 megabit per second local area network over unshielded twisted pair copper wire
100BaseT	standard 100 megabit per second ethernet network
100BaseTX	specification of 100BaseT that supports full duplex operation

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