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Synchronizes to an external composite clock timing source
In controlled environments, if the composite clock signal degrades, ETI provides Stratum 3E holdover using historical timing data
Provisionable Stratum levels: 3, 3 with 3E holdover, 4, and SONET
LET or RST operation (primary shelf)
Up to Stratum 3/3E free-run accuracy
Jitter and wander reduction of external timing source
A second ETI can be installed for standby operation

GR-303 64 Kbps datalink with EOC and TMC
Software downloadable
One to 28 DS-1s distributed among up to three discrete GR-303 groups
One DLP required per Tellabs 1000 MSA system (hot standby option available)
Operates with all Tellabs 1000 MSA transceivers (T-1, E-1, xDSL, fiber and wireless)

End-to-end compatibility with existing cards in the field
Two circuits per card, each able to support different provisioning
Software-provisionable E&M and PLR modes (2-wire or 4-wire)
Provides one or two E&M circuits per card, depending on modes: E&M Type I, II, III, IV, V and PLR I and II
Software-provisionable Tandem and DX modes (4-wire only)
Provisionable transmit and receive gain
Provisionable bias (switched or fixed — DX mode only)
Post-equalization
600 ohms and 1200 ohms fixed impedances
Normal and reverse DX signaling

In controlled environments, if the composite clock signal degrades, ETI provides Stratum 3E holdover using historical timing data
Provisionable Stratum levels: 3, 3 with 3E holdover, 4, and SONET
LET or RST operation (primary shelf)
Up to Stratum 3/3E free-run accuracy
Jitter and wander reduction of external timing source
A second ETI can be installed for standby operation
Telcordia compliant design cabinet is expandable from four shelves to eight
Fiber splice and distribution options
-48 VDC powered cooling fans
Separate vented battery compartment and battery back-up options
Standard surge protection
Copper line protection in separate compartment (non-cross-connect configurations)
Hex key lock (padlockable for additional security)
Synchronizes to an external composite clock timing source

Telcordia compliant design cabinet is expandable from three shelves to four
Fiber splice and distribution options
-48 VDC powered cooling fans
Separate vented battery compartment and battery back-up options
Standard surge protection
Copper line protection in separate compartment (non-cross-connect configurations)
Hex key lock (padlockable for additional security)

Temperature control and fan speed control
Cold rolled steel, zinc plated per ASTM-B633 Type II gold sheet metal enclosure with six fans
A test switch on the fan tray front panel allows the fans to be manually tested for correct functioning.
In the event of fan tray failure, the fan tray alarm relays communicate with the appropriate alarm monitoring interface.
Cold rolled steel, zinc plated per ASTM-B633 Type II gold sheet metal enclosure with six fans
Cold rolled steel, zinc plated per ASTM-B633 Type II gold sheet metal enclosure with six fans

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