Cyan Z-Series Engineering and Planning Guide Release 5.0
700-0023-05-00 Rev. 1 © 2013 Cyan, Inc. Proprietary Information Page 207
CyNOC
Cyan Network Operations Center — The CyNOC program provides Cyan customers with NOC
services ranging from supplemental monitoring services to a complete set of NOC services.
CyNOC service offers 24-hour continuous system and network surveillance.
CyOS Cyan Operating System
CyTAC Cyan Technical Assistance Center
CyTAC provides C
yan customers with technical call support 24 hours a day, 7 days a week, 365
days a year (24 x 7 x 365).
DAPI Destination Access Point Identifier
DCM Dispersion Compensating Module
DCN Data Communication Network
Decibel Decibel (dB) is a logarithmic scale used as a measurement of relative power.
DEI Drop Eligible Indicator
A Drop Eligible Indicator indicates the drop eligibility of a frame.
DHCP
Dynamic Host Configuration Protocol — DHCP allows a computer to connect to an IP-based
network without having a pre-configured IP address.
DM Delay Measurement
DNS
Domain Name System — DNS is used to convert human-friendly host names and domain
names into numerical IP addresses.
DSCP Differentiated Services Code Point
DSR Digital Signal Rate
DTE Data Terminating Entity
DTM
Digital Transmission Module — The Cyan Z-Series 8-port DTM-8 and DTM-8G provide
multiservice 10G transponder and regenerator functions. The DTM-8 and DTM-8G encode
Ethernet and SONET/SDH client-side signals into a standard G.709 OTN optical channel
(OTU2 DWDM) for DWDM drop and insert services in the Cyan Z-Series multi-layer transport
platforms.
The Z-Series DTM-100G is a 100 Gbps dual-slot transponder module with configurable OTU4
mapping and forms the DWDM interfaces for the Cyan Z22 (-48V), Z33, and Z77 100 Gbps
transponder solutions.
The DTM-100G module receives a C Form-Factor Pluggable (CFP) based 100 GbE or OTU4
signal and generates a 100 Gbps ITU grid wave with OTU4 embedded wrapping.
DVM Delay Variation Measurement
DWDM
Dense Wavelength Division Multiplexing — DWDM is the transmission of multiple signals over
closely spaced wavelengths in the 1550nm region on a single fiber of fiber pair.
EA Element Access
EBS
Excess Burst Size — The Excess Burst Size is a bandwidth profile parameter. EBS limits the
maximum number of bytes available for a burst of service frames sent at the UNI speed to
remain EIR conformant.
EDFA
Erbium Doped Fiber Amplifier — EDFA is a device used to amplify optical signals. Unlike
regenerators, EDFAs directly amplify an optical signal. EDFAs do not convert it to electrical
before increasing the signal. With EDFA, optical fibers are doped with erbium, which can amplify
light in the 1550nm region when it is pumped by an external laser.
EFM Ethernet in the First Mile
EFP Ethernet Flow Point
Egress Frame A service frame sent from the service provider to the CE.
EIR
Excess Information Rate —
The EIR is a bandwidth profile parameter. EIR defines the average
rate in bits per second of service frames up to
which the network can deliver service frames, but
without any performance objectives.
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