Toshiba Strata DK14 General Description Manual page 203

Strata DK14 and DK40i systems support the E911 feature through a standard telephone port to an
external, third party system. The third-party E911 adjunct system provides translation and
signaling of the correct CESID location information to the 911 PSAP.
The Strata DK424 system supports the E911 enhanced locator service through either external
adjunct equipment or the CAMA Trunk Interface Unit (RMCS). The RMCS is a special CO line
card installed in a card slot. A system will support up to four trunks. Excess calls will route as
standard 911 calls over local trunks.
The CAMA card solution provides internal notification. When a 911 call is connected to the
PSAP, the Strata DK will ring designated stations and attendant consoles and present CESID
information in the displays. When a notified station answers the call, a three-way conference is
established between it, the calling party and the PSAP. The SMDR port generates two call records:
one at the beginning of the call and one at its termination.
Note The FCC is in the process of defining national standards for E911 compatibility, but there
is no official due date. At present both legal and technical requirements vary significantly
by state and readers are advised to contact local emergency service providers and
telephone companies for detailed requirements.
DK14 and DK40i Operation
Strata DK14 and DK40i systems support E911 operation by forwarding 911 calls and 9+911 calls
to designated standard ports to interface with external, third-party, translation equipment. The
systems provide up to two standard telephone ports for this purpose. The external interface
connects a standard telephone port to a CAMA trunk and provides multi-frequency (MF) signaling
and translates the DN from the Strata DK to CESID.
The interface between the third-party adjunct equipment and the E911 tandem CO must use
special CAMA trunks. These specialized trunks are ordered through the special ordering desk of
your local phone company.
DK424 Operation
In addition to the external solution, the Strata DK424 system supports the E911 service through the
CAMA Trunk Interface Unit (RMCU/RMCS), a special CO line installed in a card slot. The
CAMA Trunk Interface Unit (RMCU) supports two CAMA Trunk Subassemblies (RCMS) that
support two CAMA trunks each. Software in the DK424 performs the CESID translation and
signaling.
Adjunct Equipment Suppliers
Two companies have been identified that supply the E911 adjunct translation systems -Proctor and
Associates, Redmond, WA (800) 824-9719; and Telident, Inc., Minneapolis, MN (800) 536-4911.
Information regarding the E911 adjunct interface equipment can be found in the Strata DK
Installation and Maintenance Manual.
Benefits
Enables the Strata DK to conform to most regulatory environments. The agency responding to the
911 call gets location information that makes it easier for them to find the right location within the
facility. This provides faster emergency service to those needing it.
Strata DK Feature Description 5/99
Features
System Features
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