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  3. Find an Installer
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  5. Questions?  Call 800-929-8061 or 248-288-7000
Accessories

Audio and Video Conferencing

Avaya Aura

Avaya Definity

Avaya IP Office

Avaya Merlin

Avaya Partner

Barcode Scanners

Cisco

Digium

Grandstream

Headset Solutions

IP Phones and Devices By Hosted Service

Mitel

Nortel

Paging Solutions and Door Phones

Polycom (Poly)

Repair Service & Technical Support

ShoreTel

Single Line Phones

Ugly Boxes

Yealink



TN746B - TN767E

TN747B 8-Port Central Office Trunk Circuit Card
TN748C Tone Detector
TN748D Tone Detector

TN747B 8-Port Central Office Trunk Circuit Card

$39.99

TN748C Tone Detector

$39.99

TN748D Tone Detector

$39.99
TN750C Announcement Circuit Pack
TN754B 4-Wire DCP Digital Line Circuit Pack
TN754C 4-Wire DCP Digital Line Circuit Pack

TN750C Announcement Circuit Pack

$39.99

TN754B 4-Wire DCP Digital Line Circuit Pack

$39.99

TN754C 4-Wire DCP Digital Line Circuit Pack

$39.99
TN756 Tone Detector
TN760C Tie Trunk
TN763D Auxiliary Trunk

TN756 Tone Detector

$39.99

TN760C Tie Trunk

$39.99

TN763D Auxiliary Trunk

$39.99
TN767E DS1 / ISDN PRI Interface Circuit Pack
Avaya 700A DS1 CPE Loopback Jack (107988867)

TN767E DS1 / ISDN PRI Interface Circuit Pack

$39.99

Avaya 700A DS1 CPE Loopback Jack (107988867)

$39.99



Metroline, Inc.  •  2250 Meijer Drive  •  Troy, MI 48084 •  Phone: 800-929-8061 or 248-288-7000
Business Hours: Mon-Thurs 8:30 am to 6 pm, Fri 8:30 am to 5:30 pm EST
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© 2026 Metroline, Inc.
Metroline Inc. is an independent distributor of technology and telecommunications equipment. Metroline Inc. does not represent any manufacturer or its affiliates in any way. The company, product and service names used in this web site are for identification purposes only. All trademarks and registered trademarks are the property of their respective owners.