Basic Rate ISDN Line Ports
Overview
What It Is?
Verizon's Unbundled Basic Rate Line Port provides a 2-wire electrical interface to our local switch. The interface allows you to provision Basic Rate ISDN and/or terminate to a platform, wherever one is available. A Basic Rate ISDN Port supports a Digital Subscriber Line having two 64 Kbps bearer channels and one 16 Kbps out-of-band signaling channel -- or 2B+D.
This port offers features such as circuit switched voice and circuit switched data. Additionally, electronic key features can be provisioned through the interface for key system functionality.
How It Works
Our Basic Rate ISDN port terminates ISDN voice capability and circuit switched data at your collocation arrangement through one or more terminals. A 2-wire line port connects to our local switching system using a 2-wire central office distribution frame cross-connect between your distribution frame termination and that of the Basic Rate ISDN port.
Description
The Basic Rate Integrated Services Digital Network (ISDN) Port provides a 2-wire electrical interface to the local switch for the provisioning of Basic Rate ISDN capabilities. The Basic Rate ISDN interface supports a Digital Subscriber Line comprised of two 64 Kbps bearer channels and a single 16 kilobits per second (Kbps) out-of-band signaling channel (2B D)..
The Basic Rate ISDN port can be terminated to a Platform where available.
Availability
Basic Rate ISDN Line Ports are available throughout the Verizon Footprint.
Pricing
There is a monthly charge for the basic rate ISDN line port. In addition, usage charges apply; there are the following Non-Recurring Charges (NRC): service order, a line port conversion service charge and a line port installation charge. Also, NRCs are assessed for changes to line features after the line is in service. .
The CLEC is charged the full price of the port at activation for the multi-channel ports of BRI whether or not all of the channels are activated. Capacity is dedicated to that port (e.g., in the BRI, there is 2B D capability provided whether or not the three channels are ordered).
The CLEC achieves access to basic UNE ISDN capability with the ordering of the unbundled ISDN port. Some optional features may be chargeable.
Two NRCs are associated with activating an unbundled BRI port. The installation charge covers the central office wiring that may be required when installing a new unbundled BRI. This charge is assessed on new installations. A software change charge is assessed per line for the activation of one or more of the basic ISDN capabilities subsequent to the activation of an unbundled BRI port.
Circuit Switched Voice and Circuit Switched Data usage-sensitive charges in some Verizon states are identical to those usage-sensitive charges assessed for a POTS UNE line. In certain other Verizon states, there are distinct and different usage sensitive rates for Circuit Switched Data traffic.
Pricing and applicable USOCs may vary by state jurisdiction and pursuant to individual carrier interconnection agreements. See your federal and state tariffs for detailed information.
Features
The various unbundled ISDN BRI Line Port attributes are translations in the switch that support the following capabilities:.
| Feature Name | Comments |
| Circuit Switched Voice | Provides 64 Kbps circuit mode to be used for voice information calls. |
| Circuit Switched Data | Provides 64 Kbps circuit mode to be used for data information calls. |
| Alternate Circuit Switched Voice/ Circuit Switched Data | Provides circuit switched voice and circuit switched data used alternately for voice information or data calls. |
| Secondary Only Directory Number | Can be used for either a directory number associated with an ISDN terminal that is used in addition to the primary directory number, or for an additional directory number on a basic voice or data capability that is used in addition to the primary directory number. |
Electronic Key Features
Electronic Key is comprised of several features which provide end users with the functionality of a key system, from the central office, thereby eliminating the need for control equipment and complex wiring on the end user's premises. ISDN terminals must be obtained independently by end users. The features included are the following:
| Feature Name | Additional Features | Comments |
| Feature Access | | Provides use of optional features via button/key assignments or feature access codes. |
| Call Appearances | | Provides for the termination of directory numbers on designated keys/buttons on an ISDN terminal. Each call appearance requires a key or button on the terminal as defined by the configuration group to which the terminal belongs. The following describe uses of call appearances below: |
| Multiple Directory Numbers | Allows for more than one directory number to be assigned to call appearances on a single ISDN terminal for the exclusive use of that ISDN terminal. One directory number will be specified as the primary directory number. |
| Shared with Directory Numbers | Allows an ISDN Group to be established where members of the group may share directory numbers of other terminals in the group. A directory number can appear on a maximum of 32 ISDN terminals. |
| Hold with Shared Directory Numbers | Allows an ISDN terminal to place a shared call appearance on hold permitting the retrieval of the call by any member of the ISDN group that has that call appearance. |
| Bridging with Shared Directory Numbers | This feature allows third party initiated bridging onto a call that is in progress as long as the terminal has an appearance of the directory number, unless manually restricted. |
| Multiple Call Appearances | Allow the assignment of a directory number to more than one call appearance button on an ISDN terminal. This allows an end user to handle more than one call on a single directory number. If multiple call appearances of shared directory numbers are required, the shared directory number must be the primary number on a terminal with multiple call appearances of that number. A single directory number may be assigned to a maximum of five buttons on an ISDN terminal. A maximum of 64 call appearances may be assigned to an ISDN terminal. |
| Shared Directory Numbers with Analog Lines | Allows a directory number of an analog station set to be a shared call appearance in an ISDN group. Suitable terminal equipment is required. |
| Expanded ISDN Group Coverage | | Includes delayed and abbreviated ringing and manual exclusion restricting the retrieval of held calls. |
| Delayed Ringing | End user selects the number of seconds to elapse before ringing is provided on an incoming call. A visual signal is activated to alert the user. |
| Abbreviated Ringing | Ringing is provided on incoming calls for a specified period only. |
| Automatic Exclusion | Prevents other terminal users in an ISDN Group from retrieving a held call and from bridging onto a call in progress. |
| ISDN Flexible Calling | | Allows the end user to transfer, hold, conference and drop calls through button activation. |
| Drop | Allows the end user to drop the last party added to a conference call. |
| Transfer | Allows the end user to transfer a call to another terminal. |
| Hold | Allows the end user to place a call on hold or retrieve a previously held call on hold by pressing the function button. |
| Conference | Allows the end user to include a third party in the call. |
Applications
The Basic Rate ISDN port provides access to the functions and capabilities of the local switch, including ISDN voice capability and circuit switched data terminating at a CLEC collocation arrangement.
Basic Rate ISDN provides basic voice and data capabilities, which can be combined on a single ISDN switch port. These basic voice and data capabilities are assigned to one or more terminals connected to the ISDN switch port.
ISDN is a switched network capability that supports services that are designed to provide end-to-end digital connectivity for the simultaneous transmission of voice and data.
Basic Rate ISDN service consists of a 2-wire line port associated with a local switching system, a 2-wire Central Office Distributing Frame (CODF) cross-connect between a 2-wire CLEC CODF termination and the BRI CODF termination. At each 2-wire interface, one conductor is called tip and the other conductor is called ring.
The BRI interface provides Line Termination (LT) functionality and utilizes the Two-Binary One-Quaternary (2B1Q) line code operating at 160 Kbps that is described in Telcordia technical reference TR-NWT-000393 [1].
BRI is available in the 2B + D configuration which provides two B channels and one D channel (for signaling).
Diagrams
