Product Catalog (PCAT)
Asynchronous Transfer Mode (ATM) Service - V18.0
NOTE: Asynchronous Transfer Mode (ATM) Service is grandfathered in all states effective October 15, 2018 and is no longer available as a new service. This product will be eliminated as of March 1, 2019.
Product Description
Asynchronous Transfer Mode (ATM) Service uses high speed ATM networking technology to bundle information into fixed segments called cells. ATM is based on industry standards governed by the ATM Forum. The ATM protocol is designed to support many different business applications within an enterprise network, treating each business application based on its bandwidth and Quality of Service (QoS) needs. ATM Service supports speeds from 1.544 Megabits (Mbps) to 622 Mbps.
Asynchronous Transfer Mode (ATM) Service requires the use of Customer Premises Equipment (CPE) that puts customer data into cells suitable for transmission over the CenturyLink™ ATM network. The CPE is purchased separately from ATM service and must conform to industry standards.
Product Diagram
Availability
Asynchronous Transfer Mode (ATM) Service is available where facilities exist throughout CenturyLink QC.
CenturyLink's Network Disclosure 400, provides information on availability of ATM by CenturyLink wire center.
Terms and Conditions
Asynchronous Transfer Mode (ATM) Service requests requires a Funding Approval for Digital Signal Level 3 (DS3) and above port speeds.
Customers wanting a coterminous contract will need to contact their CenturyLink Sales Executive to obtain a contract identification number. The contract identification number must be noted in the Variable Term Agreement (VTA) field of the ASR or under the contract section of the IR ATM Service Request Form. If contract terms are requested and no contract identification number is provided on the ASR the ASR number will be used as a contract identification number for the request. Contract terms must be noted in the VTA field and the remark field of the ASR when no contract identification number is being provided.
For more information on Terms and Conditions, contact Account Team / Sales Executives and Service Managers.
Terms and Conditions
Technical characteristics, including Network Channel /Network Channel Interface (NC/NCI) codes, were previously described in Technical Publication, Asynchronous Transfer Mode (ATM), 77378.
Pricing
Rate Structure
Recurring charges are comprised of the following rate elements:
- Bandwidth Increments per ATM quality of service levels:
- Available Bit Rate (ABR)
- Constant Bit Rate (CBR)
- Variable Bit Rate-real time (VBR-rt)
- Variable Bit Rate-non-real time (VBR-nrt)
- Unspecified Bit Rate (UBR)
- Cell Burst Size
- Central Office Connecting Channel (COCC)
- Digital Signal Level 1 (DS1) ATM Access Link
- Inverse Multiplexing over ATM (EASE Access Link) number of DS1 (NxDS1) up to 8 DS1s
- Optical Access Link (OAL)
- Port
- Protected Optical Access Link (OAL) with Diversity (Diversity is optional)
- Protected Stand-Alone Optical Access Link (SAOAL)
- Transport Mileage - (applies to only Independent Telephone company locations and non disclosed ATM locations) � Refer to Private Line Transport Tariffs for DS1and DS3 and CenturyLink Corporation Rate and Services Schedule No. 1 (QC RSS No. 1) for Optical Carrier Level 3 (OC3) and, Optical Carrier Level 12 (OC12) pricing.
Nonrecurring charges are comprised of the following rate elements:
- Central Office Connecting Channel (COCC)
- DS1 ATM Access Link
- Inverse Multiplexing over ATM (EASE) Access Link (NxDS1, up to 8 DS1s)
- Optical Access Link (OAL)
- Port
- Protected Optical Access Link (OAL) with Diversity (Diversity is optional)
- Protected Stand Alone Optical Acces Link(SAOAL) with Diversity (Diversity is optional)
- Stand-Alone Optical Access Link (SAOAL)
- Subsequent Order Charge for EASE Access Link
- Subsequent Order Charge for EASE Port
- Subsequent Service Order Charge for VPC/VCC
- Transport Mileage (applies to only Independent Telephone Company and non-disclosed ATM locations) - Refer to Private Line Transport Service Tariff for DS1, DS3, OC3, OC12 pricing.
- VCC (Virtual Channel Connection)/VPC (Virtual Path Connection)
Additional rate structure information can be found in the QC RSS No. 1, tariff, the state specific tariff, or your Interconnection Agreement.
Rates
Rates are available in Exhibit A, QC RSS No. 1, , or state specific
tariff.
Existing Interstate Fixed Period Rate Plans which have expired,
or are within three months of the expiration date, have the ability
to subscribe to a new one year or greater Fixed Period Rate Plan
and receive a discount on the current Monthly Recurring Charges
in the Fixed Period Service Rate Plan and a reduced Termination
Liability Assessment percent. Contact your CenturyLink
Sales Manager for additional information.
Additional information on expiring Interstate Fixed Rate Plans and
their associated discounts is available in QC RSS No. 1 Tariffs/Catalogs/Price
Lists.
Tariffs, Rates and Services Schedule (RSS), Regulations and Policies
Tariffs, RSS, regulations and policies are located in the QC RSS No. 1 or state specific Tariffs/Catalogs/Price Lists.
Optional Features
CenturyLink ATM features include:
Inverse Multiplexing over ATM (EASE) ATM EASE service offers bandwidth options between DS1 (1.544Mbps) and DS3 (45Mbps) levels. EASE utilizes 2 to 8 DS1s and bundles them together to create a solid bandwidth increment from 3Mbps to 12Mbps.
EASE distributes traffic evenly across multiple links to create a single high capacity virtual link that fills the gap for intermediate DS1-DS3 bandwidth requirements, offering an alternative in fiber or DS3 depleted areas and providing a natural progression for customer access in approximately the 3-12 Mbps bandwidth range. QoS levels available with EASE include CBR, VBR-nrt, and UBR.
This diagram was true at the time of writing. Now we use EASE.
Frame Relay Service (FRS) to ATM Service Interworking - Interworking PVC (IPVC): ATM IPVC allows FRS and ATM customers to communicate with each other. IPVC will perform mapping from/to the FRS dedicated connection (PVC) to/from the ATM dedicated connection (VCC) utilizing UBR ATM QoS level. IPVC provides flexibility and the customer can use the service (FRS or ATM) best suited for its specific application needs. It enables a migration path for the large number of FRS customer to ATM. IPVC provides customers with the opportunity to balance high bandwidth host or headquarter site application needs (ATM EASE/DS3/OC3/OC12) with less expensive FRS access speeds (DS0/DS1/fractional FR port), Customers can implement ATM at new sites as needed at their own pace and protect their existing service investment.
Features/Benefits
Features | Benefits |
Quality of Service (QoS) Levels |
|
Cost Effective |
|
Scalability |
|
Proactive network Monitoring and Network Maintenance |
|
Applications
Applications suitable for ATM Service include:
- Voice and video
- Packetized voice and video
- Systems Network Architecture (SNA)
- WAN/VPN connectivity
- Web hosting
- E-commerce
- Client-server (terminal-host) data
- LAN interconnection
- LAN emulation
- Remote access
- File transfer
- Internet/intranet/extranet access
- E-mail messaging
- Text imaging
- Forms processing
Implementation
Product Prerequisites
If you are an Interexchange Carrier (IXC), Internet & Data (ISP) or Wireless Service Provider (WSP) and have questions regarding your contract with CenturyLink, contact your Account Team / Sales Executives and Service Managers for more information.
Pre-Ordering
General pre-ordering activities for ATM can be found in Customer Electronic Maintenance and Repair-Maintenance Ticketing Gateway (CEMR-MTG)
- Customer Service Record (CSR)
- Service Availability
- Validate Address
- Validate Connecting Facility Assignment (CFA)
Customer Service Record (CSR) can be obtained through emailing Wireless.PLT@CenturyLink.com a request to CenturyLink. The following information is needed to process your request:
- Email address
- End-Users account telephone number
- Fax Number
- Proof of agency authorization
Contract Process: Interstate Asynchronous Transfer Mode (ATM) Service must be purchased under contract.
Ordering
ATM is service requests can be issued by submitting ASR or IR ATM Service Request Form.
Your CenturyLink Account Manager/Service Manager will complete the IR ATM Service Request form with your assistance, contact your Account Team / Sales Executives and Service Managers.
ATM service requests can be submitted by using the following Access Service Ordering Guidelines (ASOG) form:
ASOG form | New Connect | Change | Disconnect* |
Access Service Request (ASR) | X | X | X |
ASR Administration Information | X | X | X |
ASR Priloc End-User Special Access | X | X | X |
Service Address Location Info-Priloc | X | X | X |
ASR Secloc End User Special Access | X | X | X |
Virtual Connection Form | X | X | X |
Order Tracking Information | X | X | X |
*ECCKT and Customer Name needs to be included on a disconnect
Field entry requirements are described in the Access Service Request (ASR) Forms.
A Design Layout Record (DLR) requested on the IR ATM form.
For more information on ordering ATM contact your Account Team / Sales Executives and Service Managers.
Provisioning and Installation
Firm Order Confirmation (FOC) intervals are found in the Service Interval Guide (SIG).
For more information on provisioning and installation contact your Account Team / Sales Executives and Service Managers.
Maintenance and Repair
For repair, contact the ATM repair service by calling 800 227-2218.
Billing
Carrier Access Billing System (CABS) billing is described in Billing Information - Carrier Access Billing System.
Training
No training is available for Asynchronous Transfer Mode (ATM) Service, however to view other CenturyLink courses click on Course Catalog.
Contacts
CenturyLink contact information is located in Wholesale Customer Contacts.
CenturyLink Wholesale Team Tool (CWTT) is a means to identify your account contacts within CenturyLink.
Frequently Asked Questions (FAQs)
1. What is ATM technology?
ATM is a high speed networking technology based on two very simple
concepts-network conformity and QoS. Information (data, video, Internet
and voice) transferred across an ATM network is carried in 53-byte
chunks known as cells. The fixed length cell enables ATM to transfer
information faster than Frame Relay or Internet Protocol (IP) with
the highest degree of data integrity and the lowest degree of latency
of any existing networking technology. A 53-byte cell is comprised
of 48 bytes of payload (user information) and a 5-byte header. The
5-byte header enables all addressing and QoS information to be tagged
at the front of a cell and allows the payload (user information)
to be switched, instead of routed, without delay and according to
priority. Using a uniform cell structure allows all information
to travel the network at a known interval. By putting information
from different business applications into cells, the cells can share
the same network and still be treated in the same manner without
latency or loss of integrity.
2. What is the difference between Frame Relay and ATM?
Frame Relay has a variable length packet (frame) whose size depends
upon the amount of information transmitted and ATM uses a fixed
length packet (a 53-byte cell). The switching of cells enables information
to be switched very quickly in hardware and has the ability to intermingle
data, video, Internet and voice without compromising the unique
need of each application.
3. How do I find out where ATM is available?
ATM network disclosure is available at: http://www.centurylink.com/disclosures/netdisclosure400/index.html
4. What are PPD and EPD?
PPD stands for Partial Packet Discard and EPD stands for Early Packet
Discard. PPD and EPD are the commonly used industry terminology
for intelligent frame discard capability as an optional congestion
recovery procedure. EPD is a packet discard mechanism congestion
control technique that discards every cell from an ATM Adaptation
Layer 5 (AAL5) Packet Data Unit (PDU) when an ATM device buffer
overflows. It prevents cells from entering the buffer, reserving
remaining buffer capacity for cells from packets already admitted.
PPD occurs when a device drops one or more cells of the same AAL5
PDU. It discards all remaining cells of an AAL5 PDU except the last
one. This mechanism avoids transmitting cells across the network
the AA5 receiver would fail to reassemble.
5. What speeds and ATM service categories are available for
ATM to DIA?
ATM to DIA PVCs are available only on DS3 and above ports using
CBR service category.
6. What is the difference between a VPC and VCC?
A Virtual Path Connection (VPC) can carry multiple Virtual Channel
Connections (VCCs). It is our customer's responsibility to provision
VCCs within a VPC. The sum of all the VCCs needs to conform to the
traffic parameters that the customer signed up for on a VPC. Think
of it as a phone number. If another carrier comes to Denver and
buys 303-222 phone numbers from us (VPC), then we would route all
the phone calls btw/ 303-222-0000 and 303-222-9999 to that carrier.
The carrier will assign the individual numbers within that range
themselves (VCCs). CenturyLink will just treat them as a "block of numbers"
that is carried from one end-point to the other.
7. A customer bought a VPC and asked us to manage the VCCs on
their ATM network. Is that possible?
When you set up a VPC across the ATM network, the switch does not
have the ability to look into the individual VCCs within that VPC.
The customer buys a VPC with the intent of managing the VCCs within
that VPC. The customer also selects the bandwidth and the Class
of Service for the aggregate of all the VCCs in the VPC. The customer
is responsible for managing to the aforementioned parameters. That
is the whole reason for the VPCs existence-flexibility and customer
control. If the customer does not want that, they need to convert
to VCCs (PVCs) and CenturyLink will manage it for them.
8. Can a customer oversubscribe an ATM HOST? For example, I
have a DS-3 ATM with 45 Megs of Internet access at a host location
in AZ, I have two other remote locations in AZ with 9 Megs of ATM
pointing back to the host location in AZ with the 45 Megs of Internet.
Please clarify CenturyLink's over subscription policy.
The answer depends on the QoS, the amount of traffic and the number
of users. You can't get more than 45Mbps at one time through a 45Mbps
port. This is not a case of oversubscription, but rather bursting.
Please refer to the CenturyLink ATM Technical Publication 77378 regarding
the bursting policy.
9. Does a customer need fiber-optic cabling to their business
to subscribe to CenturyLink ATM Service?
No, ATM Service supports both optical (OCn) and electrical interfaces
(T1, DS3)
Last Update: October 10, 2023
p>Last Reviewed: October 10, 2023NC/NCI is a Trademark of iconectiv®.