Orion VCL MX Ringer Card (Ring Generator for FXS Subscriber Lines)
When maintaining legacy analog voice networks (POTS) over modern digital E1 multiplexers, delivering the correct electrical signaling to telephone handsets is crucial. The Orion VCL MUX Ringer Card (Ref: RNDM-5-be8401c1) acts as the central Ring Generator for your entire multiplexer sub-rack.
If your telecommunications node in Dhaka or remote power utility site utilizes FXS (Foreign Exchange Station) interface cards to connect standard desktop telephones or fax machines, this Ringer Card provides the necessary 75V RMS ringing voltage. Without it, the receiving phones will simply not ring when a call is routed to them.
Key Benefits for Your Voice Network
- High Load Capacity: Built for demanding enterprise environments. This card guarantees a powerful ring output of ≥75 volts RMS, comfortably driving a load of 5 R.E.N. (equivalent to 5 parallel analog telephones ringing simultaneously on a single line).
- Long Loop Support: Ideal for rural or sprawling industrial sites across Bangladesh. The ring generator is engineered to support long copper loops up to 1200 Ohms, ensuring phones at the far end of a campus ring just as loudly as those near the server room.
- Network Management Integration: The Ringer Card interfaces with the multiplexer’s central NMS (Network Management System). If the card experiences a fault or failure, the system instantly triggers an SNMP trap and front-panel alarm, allowing your maintenance team to respond before users report missed calls.
- Hot-Swappable Maintenance: Like most Orion VCL-MX terminal cards, the ringer module is hot-pluggable. It can be safely removed or installed without powering down the multiplexer chassis or disrupting active digital data traffic.
Key Features
- Acts as the primary Central Office (CO) Ring Generator for the Orion VCL-MX sub-rack.
- Delivers standard sinusoidal un-balanced ring output (75V RMS standard / 90V RMS optional based on chassis config).
- Supports A-law and Mu-law voice coding environments.
- Dedicated slot integration—operates independently from voice/data interface cards.
- Designed for harsh, high-temperature industrial telecom cabinets (-10°C to +60°C).

Technical Specifications
| Specification | Details |
| Brand | Orion Telecom Networks Inc. |
| Product Type | Ring Generator Card / Ringer Card |
| Part Reference | RNDM-5-be8401c1 |
| Supported Equipment | Orion VCL-MX Series Voice & Data Multiplexers |
| Output Voltage | ≥75 Volts RMS (Sinusoidal Unbalanced) |
| Load Capacity | 5 R.E.N. (Ring Equivalent Number) per channel |
| Supported Loop Length | Up to 1200 Ohms |
| Required Interfaces | Used in conjunction with FXS (RT) Line Interface Cards |
| Fault Monitoring | Yes (via VCL-MX Control Card NMS/SNMP) |
Orion VCL MUX Ringer Card Price in Bangladesh
Telecom generator cards are specialized hardware used specifically in E1 drop-insert and DACS multiplexer setups. The Orion VCL MUX Ringer Card (Ref: RNDM-5-be8401c1) price in Bangladesh is also provided based on a formal B2B quotation, varying slightly based on required quantities and current import logistics.
Besides, we specialize in sourcing and supplying authentic Orion Telecom and Valiant Communications hardware for enterprise ISPs, railways, and utility companies throughout Bangladesh. Contact our corporate sales division today to verify stock availability and request a customized procurement quote.

Frequently Asked Questions
- Do I need a Ringer Card if I am only using E&M or Data interfaces on my VCL-MX?
No. The Ringer Card is explicitly required only if your multiplexer is equipped with FXS (Foreign Exchange Station) cards that connect to standard analog telephones. If you are only routing data (RS232, Ethernet) or using E&M trunking, the Ringer Card is not necessary.
- Can this Ringer Card power multiple FXS cards in the same chassis?
Yes. A single Orion VCL-MX Ringer Card installed in its dedicated chassis slot is designed to supply the ringing voltage for all active FXS cards housed within that specific multiplexer shelf.
- What does 5 R.E.N. capacity mean?
R.E.N. stands for Ring Equivalent Number. A capacity of 5 R.E.N. means the card produces enough electrical current to ring five standard, traditional analog telephones connected in parallel on a single FXS line.
- Where can I buy Orion Telecom parts in Dhaka?
You can securely request quotes and procure official Orion telecom interface cards, power supplies, and ringer cards directly through our B2B WooCommerce platform. We handle enterprise delivery nationwide across Bangladesh.

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