ADTRAN. INC. logo

ADTRAN. INC.

82 Marks
Corp.
First Filed:Jan 23, 1995Latest Filed:Jan 31, 2020Address:Huntsville, AL 35806

Portfolio Overview

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1

Top Classes

Class 9
Electronics, Software & Scientific Equipment
77(94%)
Class 37
Construction and Repair
5(6%)
Class 42
Software, IT Services & Scientific Research
2(2%)

TTAB Proceedings

Proceedings
2
As Plaintiff
2(100%)
As Defendant
0(0%)
Extensions of Time
6

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Trademark Activity Timeline(19952023)

Trademark Portfolio

83 results

(current & previous marks)

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Filed
Registered
Last Activity
ADTRAN MOSAIC
ADTRAN MOSAIC
Trademark
Word
REGISTERED
Owner:
Serial:88780466
Filed:Jan 31, 2020
Classes:9
Registration:7196555
Registered:Oct 17, 2023
Description: Downloadable Computer software for use in delivering modular services in the field of telecommunications; downloadable Computer operating system software for use in delivering modular services in the field of telecommunications; downloadable Computer software for use in enterprise-wide management of data, applications, and processes in the field of telecommunications; downloadable Computer software for use in database management in the field of telecommunications; downloadable Computer software for use in management and monitoring of cloud computing resources in the field of telecommunications; downloadable Computer software for use in interfacing with enterprise applications in the field of telecommunications
ADTRAN MOSAIC
ADTRAN MOSAIC
Trademark
Word
ABANDONED
Owner:
Serial:87084573
Filed:Jun 27, 2016
Classes:9
SMART/RG
SMART/RG
Trademark
Word
CANCELLED
Owner:
Serial:86563361
Filed:Mar 13, 2015
Classes:9
Registration:5082929
Registered:Nov 15, 2016
SMART/RG FORWARD THINKING
SMART/RG FORWARD THINKING
Trademark
Stylized
CANCELLED
Owner:
Serial:86563365
Filed:Mar 13, 2015
Classes:9
Registration:5200469
Registered:May 9, 2017
INTELLIFI
INTELLIFI
Trademark
Word
REGISTERED
Owner:
Serial:86554578
Filed:Mar 5, 2015
Classes:9
Registration:5595962
Registered:Oct 30, 2018
Description: Component feature of customized broadband modems and computer networking modems in the nature of embedded software for use in optimizing wireless functionality
BRINGING THE WORLD TOGETHER
CANCELLED
Owner:
Serial:86504611
Filed:Jan 15, 2015
Classes:9
Registration:5060234
Registered:Oct 11, 2016
FDV
FDV
Trademark
Word
ABANDONED
Owner:
Serial:86317806
Filed:Jun 23, 2014
Classes:9
FREQUENCY DIVISION VECTORING
ABANDONED
Owner:
Serial:86317804
Filed:Jun 23, 2014
Classes:9
SUPER-VECTORING
SUPER-VECTORING
Trademark
Word
CANCELLED
Owner:
Serial:86317811
Filed:Jun 23, 2014
Classes:9
Registration:5453777
Registered:Apr 24, 2018
Description: High-speed telecommunications systems consisting primarily of routers, switches, Internet protocol networks consisting primarily of computer hardware devices, and telephones, providing fast broadband connectivity to and from routers, switches, Internet protocol networks consisting primarily of computer hardware devices, and telephones, and combinations of the above technologies, all of the above for the delivery of broadband voice, data and video services; high-speed telecommunications connectivity hardware and software for high-speed communications, namely, systems consisting primarily of routers, switches, Internet protocol networks consisting primarily of computer hardware devices, and telephones, and software that provides for the interfacing and interconnection, and for the exchange of data, to and among said system components which together combine voice, data and/or video over transmission facilities
SIMI
SIMI
Trademark
Word
CANCELLED
Owner:
Serial:86246039
Filed:Apr 8, 2014
Classes:9
Registration:4946798
Registered:Apr 26, 2016
ADTRAN CONNECT
ADTRAN CONNECT
Trademark
Word
ABANDONED
Owner:
Serial:86226004
Filed:Mar 19, 2014
Classes:9
Description: "CONNECT"
CONNECT
CONNECT
Trademark
Combined
ABANDONED
Owner:
Serial:86226001
Filed:Mar 19, 2014
Classes:9
Description: "CONNECT"
PROCARE
PROCARE
Service Mark
Word
CANCELLED
Owner:
Serial:85974346
Filed:Jul 1, 2013
Classes:37
Registration:4660470
Registered:Dec 23, 2014
Description: Maintenance and repair services for telecommunications electronic equipment
PROCLOUD
PROCLOUD
Service Mark
Word
REGISTERED
Owner:
Serial:85974352
Filed:Jul 1, 2013
Classes:42
Registration:5078245
Registered:Nov 8, 2016
Description: Technical support, namely, monitoring of network systems and troubleshooting in the nature of diagnosing telecommunications network problems; computer co-location services, namely, providing facilities for the location of computer servers with the equipment of others; computer project management services in the field of telecommunication networks for others; computer services, namely, remote and on-site management of networks, IP phone systems, IT infrastructure, and network security; providing virtual computer systems and virtual computer environments through cloud computing; providing computer network management services in the nature of monitoring network systems for technical support purposes
PROSERVICES
PROSERVICES
Service Mark
Word
CANCELLED
Owner:
Serial:85974358
Filed:Jul 1, 2013
Classes:37, 42
Registration:4625799
Registered:Oct 21, 2014
Description: Installation, maintenance, and repair services in the field of networking and telecommunications equipment, said services relating to telecommunications electronic equipment and to telecommunications data processing equipment which enable voice, data, video, and Internet communications across local, wide-area, and global communications networks; Technical support, namely, troubleshooting in the nature of diagnosing telecommunications equipment problems for enabling voice, data, video, and Internet communications across local, wide-area, and global communications networks; computer co-location services, namely, providing facilities for the location of telecommunication server equipment with the equipment of others for enabling voice, data, video, and Internet communications across local, wide-area, and global communications networks; telecommunications equipment management services for others; computer services, namely, remote and on-site management of IP (Internet Protocol) phone systems, telecommunications infrastructure, and telecommunications security; Providing virtual computer systems and virtual computer environments through cloud computing for enabling voice, data, video, and Internet communications across local, wide-area, and global communications networks; providing telecommunications system management services in the nature of monitoring telecommunications systems and equipment for technical support purposes
PROSTART
PROSTART
Service Mark
Word
CANCELLED
Owner:
Serial:85974780
Filed:Jul 1, 2013
Classes:37
Registration:4660471
Registered:Dec 23, 2014
Description: Installation services for telecommunications electronic equipment and telecommunications data processing equipment
REINVENTING THE NETWORK
CANCELLED
Owner:
Serial:85971761
Filed:Jun 27, 2013
Classes:9
Registration:4748536
Registered:Jun 2, 2015
THE ONLY CONSTANT IS CHANGE
CANCELLED
Owner:
Serial:85971758
Filed:Jun 27, 2013
Classes:9
Registration:4728266
Registered:Apr 28, 2015
ADTRAN NEO
ADTRAN NEO
Trademark
Word
ABANDONED
Owner:
Serial:85970950
Filed:Jun 26, 2013
Classes:9
NETVANTA NEO
NETVANTA NEO
Trademark
Word
ABANDONED
Owner:
Serial:85970943
Filed:Jun 26, 2013
Classes:9
ACES
ACES
Service Mark
Word
CANCELLED
Owner:
Serial:85668298
Filed:Jul 3, 2012
Classes:37
Registration:4289084
Registered:Feb 12, 2013
ACTIVCHASSIS
ACTIVCHASSIS
Trademark
Word
CANCELLED
Owner:
Serial:85631379
Filed:May 22, 2012
Classes:9
Registration:4397271
Registered:Sep 3, 2013
ACTIVREACH
ACTIVREACH
Trademark
Word
CANCELLED
Owner:
Serial:85631374
Filed:May 22, 2012
Classes:9
Registration:4401194
Registered:Sep 10, 2013
CELANA
CELANA
Trademark
Word
CANCELLED
Owner:
Serial:77614976
Filed:Nov 14, 2008
Classes:9
Registration:3758844
Registered:Mar 9, 2010
NETVANTA
NETVANTA
Trademark
Word
REGISTERED
Owner:
Serial:78763625
Filed:Nov 30, 2005
Classes:9
Registration:3180379
Registered:Dec 5, 2006
Description: Telecommunications hardware, namely routers, switches, Internet protocol telephones, and combinations of the above technologies, all of the above for voice and data inter-connectivity infrastructure for local area networks and wide area networks, and none of the above specifically designed for use in connection with utility industries
FTOT
FTOT
Trademark
Word
CANCELLED
Owner:
Serial:78706982
Filed:Sep 6, 2005
Classes:9
Registration:3518222
Registered:Oct 14, 2008
N-COMMAND
N-COMMAND
Trademark
Word
REGISTERED
Owner:
Serial:78455876
Filed:Jul 23, 2004
Classes:9
Registration:3276287
Registered:Aug 7, 2007
Description: Network management software for use in aiding the maintenance, monitoring, management, security, and design of computer networks in the field of voice and data network telecommunications
OPTI-6100
OPTI-6100
Trademark
Word
REGISTERED
Owner:
Serial:78434144
Filed:Jun 11, 2004
Classes:9
Registration:3154872
Registered:Oct 10, 2006
Description: Telecommunication hardware and software and computer networking equipment for data transmission, namely multiplexers and fiber-optic, sonet-based (synchronous optical networking) UNIs (user network interfaces)
OPTI-3
OPTI-3
Trademark
Word
REGISTERED
Owner:
Serial:78361377
Filed:Feb 2, 2004
Classes:9
Registration:3040121
Registered:Jan 10, 2006
Description: Telecommunications hardware and software and computer networking equipment for data transmission, namely multiplexers and fiber-optic, sonet-based UNIs also known as synchronous optical networking user network interfaces
OPTI-SMX
OPTI-SMX
Trademark
Word
ABANDONED
Owner:
Serial:78361378
Filed:Feb 2, 2004
Classes:9
DSL ASSISTANT
DSL ASSISTANT
Trademark
Word
CANCELLED
Owner:
Serial:78314198
Filed:Oct 15, 2003
Classes:9
Registration:2964992
Registered:Jul 5, 2005
Description: "DSL"
TOTAL ACCESS OPTI-MX
ABANDONED
Owner:
Serial:78314203
Filed:Oct 15, 2003
Classes:9
TSCAN
TSCAN
Trademark
Word
REGISTERED
Owner:
Serial:78264103
Filed:Jun 18, 2003
Classes:9
Registration:3149395
Registered:Sep 26, 2006
Description: Computer software sold as a component of telecommunications system controller units, line terminating units, and network termination units for use in testing, diagnosing, provisioning, and performance monitoring of computer hardware
SMART96
SMART96
Trademark
Stylized
ABANDONED
Owner:
Serial:78222670
Filed:Mar 6, 2003
Classes:9
ADTRAN
ADTRAN
Trademark
Word
REGISTERED
Owner:
Serial:78139579
Filed:Jun 27, 2002
Classes:9, 37
Registration:2801436
Registered:Dec 30, 2003
Description: Class 9: House mark for full line of telecommunications electronic equipment and telecommunications data processing equipment and user manuals sold as a unit therewith; software for operating, controlling, managing, and configuring telecommunications and data processing equipment and systems
Class 37: Installation, maintenance and repair of telecommunication networks, apparatus and instruments
EXPRESS 6503
EXPRESS 6503
Trademark
Word
CANCELLED
Owner:
Serial:76305765
Filed:Aug 28, 2001
Classes:9
Registration:2792169
Registered:Dec 9, 2003
Description: Telecommunications equipment and computer network access and connectivity equipment, namely, data service units * consisting of * data terminal equipment interfaces, network interfaces, and data converters and processors, all for high-speed voice, data and Internet applications
NETVANTA
NETVANTA
Trademark
Word
REGISTERED
Owner:
Serial:76305766
Filed:Aug 28, 2001
Classes:9
Registration:2807079
Registered:Jan 20, 2004
Description: Telecommunications hardware [ and software ] , namely, Internet security appliances, namely, virtual private network gateways [ and computer software for operating, configuring and managing virtual private network gateways ] * all of the above for establishing and managing interconnectivity infrastructure for local area networks and wide area networks, and none of the above specifically designed for use in connection with utility industries *
LUMINOUS NETWORKS
LUMINOUS NETWORKS
Trademark
Combined
CANCELLED
Owner:
Serial:76101683
Filed:Aug 1, 2000
Classes:9
Registration:2727633
Registered:Jun 17, 2003
Description: "NETWORKS"
PACKETWAVE
PACKETWAVE
Trademark
Word
CANCELLED
Owner:
Serial:76101682
Filed:Aug 1, 2000
Classes:9
Registration:2807665
Registered:Jan 27, 2004
N-COMMAND
N-COMMAND
Trademark
Word
CANCELLED
Owner:
Serial:75898996
Filed:Jan 19, 2000
Classes:9
Registration:2605376
Registered:Aug 6, 2002
N-FORM
N-FORM
Trademark
Word
CANCELLED
Owner:
Serial:75898994
Filed:Jan 19, 2000
Classes:9
Registration:2632417
Registered:Oct 8, 2002
N-SHAPE
N-SHAPE
Trademark
Word
ABANDONED
Owner:
Serial:75899361
Filed:Jan 19, 2000
Classes:9
N-SPECT
N-SPECT
Trademark
Word
CANCELLED
Owner:
Serial:75898995
Filed:Jan 19, 2000
Classes:9
Registration:2610279
Registered:Aug 20, 2002
T-MAX
T-MAX
Trademark
Stylized
ABANDONED
Owner:
Serial:75895930
Filed:Jan 12, 2000
Classes:9
4 X 4 DDS
4 X 4 DDS
Trademark
Combined
CANCELLED
Owner:
Serial:75798928
Filed:Sep 13, 1999
Classes:9
Registration:2737137
Registered:Jul 15, 2003
Description: High-speed telecommunication connectivity equipment for data communication, namely, hardware that combines data, voice, and disaster recovery over frame relay networks and ISDN lines; "4X4" and "DDS"
H2R
H2R
Trademark
Word
ABANDONED
Owner:
Serial:75798012
Filed:Sep 13, 1999
Classes:9
Description: HIGH-SPEED TELECOMMUNICATIONS CONNECTIVITY EQUIPMENT FOR DATA COMMUNICATIONS, NAMELY, REPEATERS
H2TU-C
H2TU-C
Trademark
Word
ABANDONED
Owner:
Serial:75798740
Filed:Sep 13, 1999
Classes:9
Description: High-speed telecommunication connectivity equipment for data communication, namely, transceivers
H2TU-R
H2TU-R
Trademark
Word
ABANDONED
Owner:
Serial:75797579
Filed:Sep 13, 1999
Classes:9
Description: HIGH-SPEED TELECOMMUNICATIONS CONNECTIVITY EQUIPMENT FOR DATA COMMUNICATIONS, NAMELY, TRANSCEIVERS
EXPRESS 6100
EXPRESS 6100
Trademark
Word
ABANDONED
Owner:
Serial:75718461
Filed:Jun 1, 1999
Classes:9
Description: High-speed telecommunication connectivity equipment for data communication, namely, equipment that combines data, voice, and disaster recovery over frame relay networks and ISDN lines
DSL ASSISTANT
DSL ASSISTANT
Trademark
Word
ABANDONED
Owner:
Serial:75665959
Filed:Mar 23, 1999
Classes:9
Description: High-speed telecommunications connectivity equipment for data communications
TAPP
TAPP
Trademark
Word
ABANDONED
Owner:
Serial:75665361
Filed:Mar 22, 1999
Classes:9
Description: High-speed telecommunications connectivity equipment for data communications
TOTAL ACCESS PARTNER PROGRAM
ABANDONED
Owner:
Serial:75665251
Filed:Mar 22, 1999
Classes:9
Description: High-speed telecommunications connectivity equipment for data communications
H-LSS
H-LSS
Trademark
Word
ABANDONED
Owner:
Serial:75650081
Filed:Mar 1, 1999
Classes:9
Description: Telecommunications transmission equipment comprising protection switches for high bit rate digital subscriber line services
EXPRESS
EXPRESS
Trademark
Word
ABANDONED
Owner:
Serial:75616209
Filed:Jan 6, 1999
Classes:9
Description: High-speed telecommunication connectivity equipment for data communication, namely, equipment that combines data, voice, and disaster recovery over frame relay networks and ISDN lines
EXPRESS 4100
EXPRESS 4100
Trademark
Word
ABANDONED
Owner:
Serial:75616431
Filed:Jan 6, 1999
Classes:9
Description: High-speed telecommunication connectivity equipment for data communication, namely, equipment that combines data, voice, and disaster recovery over frame relay networks and ISDN lines
EXPRESS 4110
EXPRESS 4110
Trademark
Word
ABANDONED
Owner:
Serial:75616208
Filed:Jan 6, 1999
Classes:9
Description: High-speed telecommunication connectivity equipment for data communication, namely, equipment that combines data, voice, and disaster recovery over frame relay networks and ISDN lines
EXPRESS 4120
EXPRESS 4120
Trademark
Word
ABANDONED
Owner:
Serial:75616435
Filed:Jan 6, 1999
Classes:9
Description: High-speed telecommunication connectivity equipment for data communication, namely, equipment that combines data, voice, and disaster recovery over frame relay networks and ISDN lines
EXPRESS 4200
EXPRESS 4200
Trademark
Word
ABANDONED
Owner:
Serial:75616437
Filed:Jan 6, 1999
Classes:9
Description: High-speed telecommunication connectivity equipment for data communication, namely, equipment that combines data, voice, and disaster recovery over frame relay networks and ISDN lines
EXPRESS 4210
EXPRESS 4210
Trademark
Word
ABANDONED
Owner:
Serial:75616338
Filed:Jan 6, 1999
Classes:9
Description: High-speed telecommunication connectivity equipment for data communication, namely, equipment that combines data, voice, and disaster recovery over frame relay networks and ISDN lines
EXPRESS 5100
EXPRESS 5100
Trademark
Word
ABANDONED
Owner:
Serial:75616428
Filed:Jan 6, 1999
Classes:9
Description: High-speed telecommunication connectivity equipment for data communication, namely, equipment that combines data, voice, and disaster recovery over frame relay networks and ISDN lines
EXPRESS 5110
EXPRESS 5110
Trademark
Word
CANCELLED
Owner:
Serial:75616479
Filed:Jan 6, 1999
Classes:9
Registration:2532528
Registered:Jan 22, 2002
Description: High-speed telecommunication connectivity equipment for data communication, namely, equipment that combines data, voice, and disaster recovery over frame relay networks and ISDN lines
EXPRESS 5200
EXPRESS 5200
Trademark
Word
CANCELLED
Owner:
Serial:75616430
Filed:Jan 6, 1999
Classes:9
Registration:2652172
Registered:Nov 19, 2002
Description: High-speed telecommunication connectivity equipment for data communication, namely, equipment that combines data, voice, and disaster recovery over frame relay networks and ISDN lines
EXPRESS 5210
EXPRESS 5210
Trademark
Word
CANCELLED
Owner:
Serial:75616405
Filed:Jan 6, 1999
Classes:9
Registration:2532527
Registered:Jan 22, 2002
Description: High-speed telecommunication connectivity equipment for data communication, namely, equipment that combines data, voice, and disaster recovery over frame relay networks and ISDN lines
EXPRESS 5220
EXPRESS 5220
Trademark
Word
ABANDONED
Owner:
Serial:75616429
Filed:Jan 6, 1999
Classes:9
Description: High-speed telecommunication connectivity equipment for data communication, namely, equipment that combines data, voice, and disaster recovery over frame relay networks and ISDN lines
FLEXDSL
FLEXDSL
Trademark
Word
ABANDONED
Owner:
Serial:75611259
Filed:Dec 23, 1998
Classes:9
Description: High-speed telecommunications connectivity equipment for data communications, namely, equipment that combines data and/or voice over high-speed digital telephone lines
ISU 2V35
ISU 2V35
Trademark
Word
ABANDONED
Owner:
Serial:75531266
Filed:Aug 5, 1998
Classes:9
Description: High-speed telecommunications connectivity equipment for data communications, namely, integrated services digital network (ISDN) terminal interfaces, sold to telephone companies and other similarly situated customers; "ISU"
NT1 ACE3
NT1 ACE3
Trademark
Word
CANCELLED
Owner:
Serial:75531311
Filed:Aug 5, 1998
Classes:9
Registration:2536962
Registered:Feb 5, 2002
Description: HIGH-SPEED TELECOMMUNICATIONS CONNECTIVITY EQUIPMENT FOR DATA COMMUNICATIONS, NAMELY, MULTIPLE TERMINATION UNITS AND TERMINAL INTERFACES, SOLD TO TELEPHONE COMPANIES AND OTHER SIMILARLY SITUATED CUSTOMERS
TOTAL ACCESS
TOTAL ACCESS
Trademark
Word
REGISTERED
Owner:
Serial:75523412
Filed:Jul 22, 1998
Classes:9
Registration:2435633
Registered:Mar 13, 2001
Description: High-speed telecommunications connectivity equipment for data communications, namely, rack-mounted chassis, remote chassis, management modules, multiplexer modules, access modules, and repeaters, sold to telephone companies and other similarly situated customers; "ACCESS"
EXPRESS 3000
EXPRESS 3000
Trademark
Word
CANCELLED
Owner:
Serial:75514431
Filed:Jul 7, 1998
Classes:9
Registration:2333822
Registered:Mar 21, 2000
Description: High-speed telecommunication connectivity equipment for data communication, namely, equipment that combines data, voice, and disaster recovery over frame relay networks and ISDN lines
EXPRESS L128T
EXPRESS L128T
Trademark
Word
ABANDONED
Owner:
Serial:75514116
Filed:Jul 7, 1998
Classes:9
Description: High-speed telecommunication connectivity equipment for data communication, namely, equipment that combines data, voice, and disaster recovery over frame relay networks and ISDN lines
EXPRESS L1.5
EXPRESS L1.5
Trademark
Word
ABANDONED
Owner:
Serial:75514826
Filed:Jul 7, 1998
Classes:9
Description: High-speed telecommunication connectivity equipment for data communication, namely, equipment that combines data, voice, and disaster recovery over frame relay networks and ISDN lines
EXPRESS L768
EXPRESS L768
Trademark
Word
ABANDONED
Owner:
Serial:75514825
Filed:Jul 7, 1998
Classes:9
Description: High-speed telecommunication connectivity equipment for data communication, namely, equipment that combines data, voice, and disaster recovery over frame relay networks and ISDN lines
FDSL
FDSL
Trademark
Word
ABANDONED
Owner:
Serial:75320856
Filed:Jul 8, 1997
Classes:9
Description: Digital telecommunications equipment, namely, frame relay multiplex communication device
FRAME IQ
FRAME IQ
Trademark
Word
ABANDONED
Owner:
Serial:75320756
Filed:Jul 8, 1997
Classes:9
Description: Performance monitoring and diagnostic termination unit for digital data service telecommunication equipment
EXPRESS XLT
EXPRESS XLT
Trademark
Word
CANCELLED
Owner:
Serial:75190479
Filed:Oct 31, 1996
Classes:9
Registration:2107197
Registered:Oct 21, 1997
Description: ISDN (Integrated Services Digital Network) terminal adapter and router with telephone interface, for data communications equipment
EXPRESS XRT
EXPRESS XRT
Trademark
Word
CANCELLED
Owner:
Serial:75173955
Filed:Sep 30, 1996
Classes:9
Registration:2106972
Registered:Oct 21, 1997
Description: ISDN (Integrated Services Digital Network) terminal adapter with telephone interfacing, for data communications equipment
EXPRESS XL
EXPRESS XL
Trademark
Word
CANCELLED
Owner:
Serial:75170458
Filed:Sep 23, 1996
Classes:9
Registration:2106952
Registered:Oct 21, 1997
Description: ISDN (integrated services digital network) terminal adapter and router for data communications equipment
EXPRESS XR
EXPRESS XR
Trademark
Word
CANCELLED
Owner:
Serial:75170601
Filed:Sep 23, 1996
Classes:9
Registration:2106953
Registered:Oct 21, 1997
Description: ISDN (integrated services digital network) terminal adapter for data communications equipment
INSTANT ISDN
INSTANT ISDN
Trademark
Word
ABANDONED
Owner:
Serial:75169772
Filed:Sep 23, 1996
Classes:9
Description: Computer software which automatically detects ISDN (integrated services digital network) switch type and service profile identifiers
BRIDLE
BRIDLE
Trademark
Word
CANCELLED
Owner:
Serial:75044187
Filed:Jan 16, 1996
Classes:9
Registration:2078675
Registered:Jul 15, 1997
Description: Repeaterless basic rate ISDN local loop extenders, namely, a range-extending two-wire to four-wire inversion unit, which allows transportation of basic rate ISDN using dual-loop, half-rate and full-rate technology