PRI/SIP – Flashcards
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A "Data Pipe" between carrier's soft-switch and SIP capable CPE
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SIP Trunk
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A logical sub-trunk within a SIP Trunk.
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Trunk Group
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CPE configuration of HFC delivery
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Standard cable modem with DHCP address Max of 46 CCS
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CPE configuration Ethernet Delivery
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Ethernet switch with static IP Max 800 CCS
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Three Ethernet switch models used?
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Ciena 311v Ciena 3916 Ciena 3930
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What configurations can SIP trunks be set to?
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Inbound only Outbound only Two-way
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Throughput for a single PRI channel
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64Kbps
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How many channels are in a single PRI
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24
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Comcast can provide up to how many trunks over fiber?
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8
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PRI over Ethernet utilizes which IAD?
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Adtran Netvanta 644
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PRI over HFC utilizes which IAD?
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Adtran 908e
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A loop providing a connection between two switch points
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A Trunk
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Connect PBX to Switch?
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Switched Trunks
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Connect PBX to PBX
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Tie Trunks
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Connect switch to switch
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Inter-Machine Trunks
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PRI Trunks are made up of two types of channels?
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B or Bearer -Channels D or Delta -Channels
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Can be used to transport voice or data, Comcast only uses them for Voice
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B-Channels
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Used as management channels, responsible for timing, signaling, call set up, call teardown, alarms, etc.
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D-Channels
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Data rate for each channel?
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64kbps
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Total bandwidth needed for a single PRI circuit?
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1.544Mbps
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PRI over DOCSIS can support?
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2 Full PRI circuits
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In case of a power outage, calls will automatically reroute to a predefined number to ensure business continuity
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Destination Unreachable
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What is the maximum number of Trunk Groups?
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Its equal to the number of channels the customer orders, each channel can serve as a Trunk Group
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DID
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Direct Inward Dialing
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DOD
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Direct Outward Dialing
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Identifies the toll free number dialed by the caller and supports phone traffic analysis.
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DNIS- Dialed Number Identification Service
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CNAM
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Calling Name and Number - Delivers the outbound caller ID
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With 2 PRI Trunks, if one Trunk is at capacity, new calls can spill over to the other Trunk
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Trunk Overflow
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Preferred modem for PRI over DOCSIS
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Arris 760
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Port that the modem will connect to on the Adtran 908
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ETH 0/1
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Port that the customers PBX will connect to on Adtran 908
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T1 0/3 and 0/4
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The type of connection that will interface the Adtran 908 with the customers PBX
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RJ48c
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Comcast Business provides businesses with two options when it comes to trunking, what are they?
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SIP PRI
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What is PRI?
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Primary Rate Interface
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If a customer has a TDM or IP PBX what trunking service would they be utilizing?
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PRI
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Dynamic protocol that supports Inbound and Outbound calls on each channel?
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PRI
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PRI support up to how many channels?
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23 B channels for voice and 1 D for management
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Comcast Business can sell how many PRI's at a single location?
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8
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What type of equipment is required to install SIP trunking?
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IP PBX
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What is SIP?
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Session Initiation Protocol
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How much dedicated bandwidth is provided for PRI and SIP trunking?
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50Mbps - PRI 100Mbps - SIP
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When SIP is delivered via Fiber what range of concurrent calls are available to the customer?
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6 to 800 CCS
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When SIP is delivered via HFC what range of concurrent calls are available to the customer?
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6 to 46 CCS
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How many PRI are available to a customer via HFC?
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2
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How many PRI are available to a customer via Fiber?
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8
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With SIP, when a trunk group is not reachable, the next inbound calls will be routed to?
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Another trunk group in the same account (if customer chooses trunk group failover feature) OR A predetermined external destination such as PSTN # OR The CFNR feature which allows a customer to select a TN to route calls to
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This feature allows a customer to opt into additional call capacity, this is calculated based on the number of regular CCS purchased and then takes 20%?
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Bursty channel functionality
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If a trunk group has failover or load balancing a customer can not have which feature added?
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Bursty channel functionality
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This feature allows a customer to determine the per CCS split they want by percentage on a trunk group?
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Trunk Group Load Balancing
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How many trunk groups can a customer set up for Trunk Group Load Balancing to split the traffic?
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5
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This feature functions dynamically allowing for incoming calls to failover, or overflow to a different SIP trunk group at another location, if the original destination trunk group is out of service or busy?
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Trunk Group Failover
