Routing features

By Geraldine Ward,2014-04-14 16:28
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Routing features

    Routing features

; Selective routing

    ; Default routing

    ; Default routing on record not found ; Default routing on network trouble (internal to the s/r)

    ; Default routing on no ANI delivered ; Overflow routing

    ; Non-selective routing

    Call conference and transfer capabilities

; Fixed transfer

    ; Manual transfer

    ; Selective transfer

    ; Handoff or inter-tandem transfers

    Network overflow conditions

; Call forward on busy line

    ; Call forward on don’t answer

    ; Call forward on night service, CPE trouble, or power failure at the PSAP

    Network control features

; Forced disconnect

    ; Called party hold

    ; Caller ringback

    ; Flash and transfer request

    ; Delay timing in dialing sequence ; Delivery of ANI on abandoned calls ; Delivery of ANI on 9-1-1 calls with caller-id blocking requests

    ; PSAP placing the caller on hold ; Consultation hold

    ; Automatic bridging feature

    ; Answer supervision

    Call delivery requirements

; Standard caller ANI to "CAMA-like" and enhanced MF PSAP’s

    ; ESCO indicator

    ; Anonymous calls

    ; PSAP trunk ANI delivery failure ; 10 digit ANI with no flash digits ; Delivery of the caller’s ALI to the PSAP

    ; Voice path integrity to deliver TTY/TDD information

    Call management and sequencing characteristics

; ACD functionality

    ; Circle hunting, FIFO, and other trunk sequencing methods ; Automatic conference of caller on multi-way connections ; Add/drop control of the primary PSAP

    ; Transfer to announcements

    ; Routing on SS7 trunks on either the charge (bill #) or calling party number field

    on a per trunk group or per router basis

    ; Routing to a re-order tone on network trouble encountered on two or more

    successive failing circuits and default routing (cut through of caller) on time-out


    Network connectivity Incoming

; Traditional CAMA

    ; SS7

    ; POTS lines on a selective router

    ; Simulated facility groups

    ; Inter-tandem router to router trunks (SS7 or CAMA) ; Local isdn connections (BRI or PRI)

    ; Wireless CAS, and NCAS SS7 connections

    ; Wireless FG-D like MF connections

    ; Enhanced services and emerging technologies (i.e., VoIP, etc.) ; SS7 handoff trunks

    ; PSAP CAMA-like trunks

    ; CAMA trunks from private switches

    ; Calls from operator services or other network survivability sources ; Call management on non-9-1-1 calls

    Network connectivity outgoing

; CAMA like (8 digit) MF PSAP trunks

    ; Enhanced MF trunks (10 digit only, or 10/20 digit signaling) ; ISDN BRI and PRI PSAP circuits

    ; 10 digit only signaling (no 11 digits)

    ; POTS lines

    ; SS7 outgoing trunks to public switched network ; SS7 outgoing trunks to another E9-1-1 s/r switch ; PSAP trunks to another router

    ; MF CAMA trunks to another router

; Emerging technologies (i.e., VoIP, etc.)

    o What could go under here? (Frame Relay, SONET, ATM etc.)

Non-call related features of the E9-1-1 network

; Traffic reports of 9-1-1 trunks

    ; Output of messages to maintenance personnel of call problems and failures ; Congestion control through the use of SFG’s or trunk group sizing

    ; Ability to perform test queries on the e9-1-1 routing database ; Ability to use non-dialable number as routing TN’s

    ; Routing on pseudo prefixes

    ; Call processing speed, reliability, redundancy, no single point of failure, etc ; Out of service maintenance lists

    ; Re-route activation through a normally open or normally closed condition ; Use of an internal switching matrix vs. use of an adjunct switch for routing ; Ringback tone being generated from the PSAP, router, or originating end office ; Security of the switching network to unauthorized intrusion or changes ; Alarming of circuits and components

    ; Incoming test trunk function

    ; Outgoing test trunk function

    ; Trunk line work station

    ; Recognition of standard MF and DTMF digits

Database related issues

; ESN limits

    ; Links to internal and/or external routing database(s)

    ; Routing value returned from the 9-1-1 database

    ; NPA management

    ; NPA-NXX management of caller ANI

System management

; Open access to all telecommunications carriers

    ; Standards of care for operating a 9-1-1 network

Future considerations Left out

Call setup intervals

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