null
Tellabs

Tellabs 816123 2w FXS SF Signaling Set w/ Gain Term Repeater Module 6123

(No reviews yet) Write a Review
SKU:
31597
MPN:
816123
Condition:
Used
Availability:
Usually ships within 1-2 business days.
Weight:
3.00 LBS
Shipping:
Calculated at Checkout
  • Tellabs 816123 2w FXS SF Signaling Module 6123 — front panel with DIP switches, red monitor jacks, fac gain and term loss labels, Tellabs logo
  • Tellabs 816123 PCB interior — top view showing MDL24H relay, Tellabs 88-5886 IC, PLMC14521BG IC, and component layout
  • Tellabs 816123 PCB close-up — lower board detail showing D6811CJ IC, AT&T chips, PLMC14521BG, resistors, and relay array
  • Tellabs 816123 faceplate detail — 6123 label, 2w FXS SF signaling set w/gain, XMT and IN DIP switches, fac gain/term loss labels, busy LED, NCXFT111AA barcode label
  • Tellabs 816123 lower faceplate — RCV DIP switches, term loss and fac gain labels, 2w mon and 4w rcv mon ports, 816123 part number, Tellabs logo
$45.00
Was: $90.00
Current Stock: 2

Sold Out

Description

Tellabs 816123 2w FXS SF Signaling Set w/ Gain Term Repeater Module 6123

A 2-wire FXS signaling module with single-frequency (SF) signaling capability and integrated gain/termination repeater. Designed for use in Tellabs carrier and telephony shelf systems to manage signal transmission, reception, and line loss compensation.

Specifications & What's Included

  • Model: Tellabs 816123 / Module 6123
  • Interface: 2-Wire FXS (Foreign Exchange Station)
  • Signaling: Single Frequency (SF)
  • Adjustable gain and termination loss (0.1–12.0 dB range) via DIP switch
  • Transmit levels: 0.1, 0.2, 0.4, 0.8, 1.8, 3.0, 6.0, 12.0 dB selectable
  • Receive levels: 0.1, 0.2, 0.4, 0.8, 1.5, 3.0, 6.0, 12.0 dB selectable
  • Monitor ports: 4-wire transmit, 2-wire, 4-wire receive, 2-wire
  • Red LED busy indicator on faceplate
  • Module only; no shelf or accessories included

Applications

Used in Tellabs carrier telephone systems for signal conditioning and repeater functions on 2-wire subscriber lines. Handles SF signaling protocols common in legacy telephony infrastructures. Typical deployment in central office or remote terminal environments where line loss compensation and gain adjustment were required for reliable signal transmission over extended distances.

Condition: Used
This Tellabs 816123 2w FXS SF Signaling Set with Gain Term Repeater Module 6123 has been inspected and appears to be in good used condition. The faceplate is clean with no significant damage; DIP switches, monitor jacks, and the busy LED indicator are all present and intact. The PCB shows normal handling wear typical of a pulled telecom module. Please view our photo set and contact us if you have any questions. Please note: We have multiple units in stock — yours may not be the one shown in the photos, however, it will be similar in condition and function.
View AllClose

Warranty Information

We stand behind every item we sell with a 30-day money-back guarantee. If your item arrives not as described, you may return it within 30 days for a full refund. Please inspect your purchase upon arrival and contact us with any questions.
View AllClose

Additional Information

Brand:
Tellabs
Model:
816123
MPN:
816123
Secondary Model:
6123
SKU:
31597
Type:
2-Wire FXS SF Signaling Set with Gain Term Repeater
Form Factor:
Card/Module
Interface Type:
2-Wire FXS (Foreign Exchange Station)
Signaling Type:
SF (Single Frequency) Signaling
Gain Control:
Facility Gain (fac gain) adjustable via DIP switch
Term Loss:
Adjustable via DIP switch (0.1–12.0 dB range)
Transmit Settings:
XMT selectable: 0.1, 0.2, 0.4, 0.8, 1.8, 3.0, 6.0, 12.0
Receive Settings:
RCV selectable: 0.1, 0.2, 0.4, 0.8, 1.5, 3.0, 6.0, 12.0
Monitor Ports:
4w xmt mon, 2w mon, 4w rcv mon, 2w visible on faceplate
Busy Indicator:
Red LED busy indicator on faceplate
Condition:
Used – Inspected
Compatible With:
Tellabs carrier/telephony shelf systems
Country/Region of Manufacture:
Japan (MDL24H relay marked JAPAN)
Seller Notes:
Module only; no shelf or additional accessories included.
Condition Notes:
Tellabs 816123 2w FXS SF Signaling Module 6123. Inspected and in good used condition. Faceplate clean, DIP switches and jacks intact, PCB shows normal wear. No shelf included.
View AllClose

Related Products

Related Products

Tellabs 6923 2W FXS SF Signaling Set module — angled front and side view showing faceplate label and Tellabs logo Tellabs 6923 circuit board interior — top view showing main PCB components including TN-branded transformer module 37-0001
Add to Cart
Quick view

Tellabs 6923 826923 2W FXS SF Signaling Set Module Card Telecom

Tellabs

$40.00
Was: $80.00
Tellabs 6923 826923 2W FXS SF Signaling Set Module Card TelecomThe Tellabs 6923 is a 2-wire FXS (Foreign Exchange Subscriber) single-frequency (SF) signaling set module designed for plug-in...
31605
SKU:
31605
Availability:
Usually ships within 1-2 business days.
Weight:
5.00 LBS
Brand:
Tellabs
Model:
6923
MPN:
826923
Secondary Model:
826923
SKU:
31605
Type:
2W FXS SF Signaling Set Module
Interface Type:
2-Wire FXS (Foreign Exchange Subscriber)
Signaling Type:
SF (Single Frequency) Signaling
Form Factor:
Plug-In Card / Module
Front Panel Indicators:
rcv in, busy, xmt out LED test points
Front Panel Controls:
rcv and xmt level adjustment switches (10 to 0dB)
Connector Type:
Edge connector (plug-in card); front test jacks
Compatible With:
Tellabs carrier telephony / digital cross-connect systems
Condition:
Used – Inspected, Good Condition
Seller Notes:
Module only; no chassis or external cables included.
Country/Region of Manufacture:
United States
Condition Notes:
Tellabs 6923 2W FXS SF Signaling Set module. Inspected and in good used condition. Faceplate, switches, and test jacks intact. PCB shows normal aging. No visible damage.