STARPLUS Triad 1, Руководство по описанию продукции

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2-42 ISDN
Chapter 2 - Digital Station Features
ISDN
Current Triad 1/2/3 software supports Primary Rate Interface (PRI) and Basic Rate Interface
(BRI) Integrated Services Digital Network (ISDN) circuits. The PRI provides 23 bearer channels
and one data channel (23B+D). The BRI provides two bearer channels and one data channel
(2B+D).
Calling Number and Called Number services are supported with the PRI and BRI. Calling
Number services will be routed in the same manner as ANI/ICLID calls using the ICLID route
table and name/number translation table.
The rules and conditions of ANI/ICLID are the same, and still apply to Calling Number service
on ISDN lines. Called Number services will be routed using the DID/DNIS route table. The
rules and conditions of DID and DNIS are the same, and still apply to ISDN Called Number
service on ISDN lines.
Channels
The bearer channels (B channels) transport voice information to and from the Central
Office.
The data channel (D) controls all signaling information for the bearer channels.
PRIB/BRIB
Both the PRIB and the BRIB require the Phase Lock Loop Unit (PLLU) to properly operate.
Both the PRIB and the BRIB can only be installed in the Basic KSU.
The Triad 3 system requires a memory expansion unit (MEMU) for use of the PRIB/BRIB
cards.
The PRIB only supports the NI-2 standard. The BRIB only supports the NI-1 standard.
Neither the PRIB nor the BRIB will support the trunk features of Paging, Reseize, Queuing,
or RAN Support.
Vodavi has successfuly integrated its BRI ISDN with the Lucent 5 ESS Central Office and its
PRI ISDN with the Lucent 5 ESS, Siemens, Stromburg Carlson, and the DMS 100 Central
Offices. Vodavi ISDN should interface with all Central Office switches, but this has not
been verified. Therefore some delays in service may be experienced.
Electronic Key Telephone Service
Electronic key telephone service (EKTS) is a feature that can be provided on BRI ISDN to
simulate standard analog DID lines. This allows several different numbers to be shared by a
single BRI circuit.
Due to the decline in telephony tariffs, there is an increasing demand for BRI ISDN features. A
BRI circuit allows two simultaneous calls to be handled, due to its technical specification. BRI
circuits have two B-Channels at 64 kilobytes per second and one D-Channel at 16 kilobytes
per second.
The Bearer (B) Channels are designed for PCM (voice) and the Data (D) Channel is designed to
carry information specific to each incoming and/or outgoing call.