Customer Reviews
  1. About Us
  2. Contact Us
  3. Find an Installer
  4. Sell Us Your Equipment
  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



TN420D - TN744E

TN429D DIOD (Direct Inward Outward Dialing)
TN464D Universal DS1/ISDN Circuit Pack
TN464F Universal DS1 ISDN PRI Interface

TN429D DIOD (Direct Inward Outward Dialing)


TN464D Universal DS1/ISDN Circuit Pack

$39.99

TN464F Universal DS1 ISDN PRI Interface

$34.99
TN464GP Universal DS1/PRI Interface (108826884)
Avaya TN464HP DS1/ISDN PRI Circuit Pack
TN570B Expansion Interface

TN464GP Universal DS1/PRI Interface (108826884)

$39.99

Avaya TN464HP DS1/ISDN PRI Circuit Pack

$39.99

TN570B Expansion Interface

$39.99
TN570D Expansion Interface
TN744D Call Classifier
Avaya 700A DS1 CPE Loopback Jack (107988867)

TN570D Expansion Interface

$49.99

TN744D Call Classifier

$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.