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Overview
Specs
Item Number and Maker | Cisco SM-D-48FXS-E |
Port Density | High |
FXS Ports Quantity | 48 |
Adjustable Ports for Extended Distance FXS | 48 |
Connection Type | 2 RJ-21 Connectors |
FXO Bypass Connections | 2 |
Minimum IOS Software Version | Version 15.2(4)M2 or newer |
Voltage When Not in Use | -44 V |
Current During Call (Short and Long Distance) | 25 mA (Short), 35 mA (Long) |
Ring Signal Frequency | 20, 25, 30, 50 Hz |
Type of Ring Waveform | Sine Wave without DC Offset |
Maximum FXS Distance (Short) | 3000 ft |
Maximum FXS Distance (Long) | 11,000 ft |
Supported Cable Types | Category 3, Category 5 |
Connector Types | RJ-21, RJ-11 |
Module Width | Double Wide |
Standards for Immunity | EN 55024, CISPR 24, EN50082-1, EN 61000 |
Compatible Cisco Platforms | Cisco 3945, 3945e, 3925, 3925e, 2951 |
REN Capacity | 5REN (Short), 2REN (Long) per Port |
Ring Voltage Capability | 54 Vrms at 5REN (Short), 62 Vrms at 2REN (Long) |
Supported FXS Signaling | Loop-Start, Ground-Start |
Designated Slots for DWSM | Slot 4 (3945, 3945e), Slot 2 (3925, 3925e, 2951) |
Caller ID Transmission Type | Frequency-Shift-Keying when Idle |
Ring Tone Customization | Adjustable by Country |
FXS Loop Resistance Limits | Up to 600 Ohms (Short), Up to 1400 Ohms (Long) |
SM-D-48FXS-E
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Product Description
The SM-D-48FXS-E Cisco module features 48 Foreign Exchange Station (FXS) ports, supporting on-hook voltage of -44 V and off-hook loop current of 25 mA for short-loop-length ports and 35 mA for long-loop-length ports, designed for high-density telecommunication needs. It is compatible with Cisco IOS Software Release 15.2(4)M2 or later and can be installed in specific slots of Cisco 3945, 3925, and 2951 platforms, offering FXS loop lengths up to 3000 ft for short and 11,000 ft for long loop length ports. Additionally, the module provides two RJ-21 connectors and supports Category 3 and Category 5 cabling, ensuring reliable connectivity and compatibility with a variety of network infrastructures.Key Feature for the SM-D-48FXS-E
- What is the maximum number of Foreign Exchange Station (FXS) ports available?
The device supports up to 48 FXS ports. - Which Cisco IOS Software release is required for operation?
Operation requires Cisco IOS Software Release 15.2(4)M2 or later. - How many RJ-21 connectors are present?
There are 2 RJ-21 connectors. - What is the on-hook voltage provided by the FXS ports?
The on-hook voltage is -44 V. - Can the FXS ports support extended loop lengths?
Yes, 48 ports can be configured as FXS-Extended Loop Length. - What are the supported ring frequencies?
Supported ring frequencies are 20, 25, 30, and 50 Hz. - What is the maximum loop resistance supported by the short-loop-length port?
The short-loop-length port supports up to 600 Ohms. - What type of cable is recommended for use with the device?
Category 3 and Category 5 cables are recommended. - What is the Ringer Equivalence Number (REN) loading for each port type?
5REN per port for Short-Loop-Length Ports and 2REN per port for Long-Loop-Length Ports. - Which platforms support this device?
Supported platforms include Cisco 3945, Cisco 3945e, Cisco 3925, Cisco 3925e, and Cisco 2951.
Product Review
The Cisco SM-D-48FXS-E module offers a high density of 48 FXS ports, which are all configurable as FXS-Extended Loop Length, making it suitable for a variety of voice applications within large enterprises or service provider networks. However, its requirement for Cisco IOS Software Release 15.2(4)M2 or later limits its compatibility to newer Cisco platforms, such as the Cisco 3945 and 2951 series, potentially excluding older infrastructure. Additionally, while it provides two RJ-21 connectors for easy scalability, the double-wide form factor may limit the number of modules that can be installed in a single router, affecting expansion capabilities.
Overview
Specifications
Item Number and Maker | Cisco SM-D-48FXS-E |
Port Density | High |
FXS Ports Quantity | 48 |
Adjustable Ports for Extended Distance FXS | 48 |
Connection Type | 2 RJ-21 Connectors |
FXO Bypass Connections | 2 |
Minimum IOS Software Version | Version 15.2(4)M2 or newer |
Voltage When Not in Use | -44 V |
Current During Call (Short and Long Distance) | 25 mA (Short), 35 mA (Long) |
Ring Signal Frequency | 20, 25, 30, 50 Hz |
Type of Ring Waveform | Sine Wave without DC Offset |
Maximum FXS Distance (Short) | 3000 ft |
Maximum FXS Distance (Long) | 11,000 ft |
Supported Cable Types | Category 3, Category 5 |
Connector Types | RJ-21, RJ-11 |
Module Width | Double Wide |
Standards for Immunity | EN 55024, CISPR 24, EN50082-1, EN 61000 |
Compatible Cisco Platforms | Cisco 3945, 3945e, 3925, 3925e, 2951 |
REN Capacity | 5REN (Short), 2REN (Long) per Port |
Ring Voltage Capability | 54 Vrms at 5REN (Short), 62 Vrms at 2REN (Long) |
Supported FXS Signaling | Loop-Start, Ground-Start |
Designated Slots for DWSM | Slot 4 (3945, 3945e), Slot 2 (3925, 3925e, 2951) |
Caller ID Transmission Type | Frequency-Shift-Keying when Idle |
Ring Tone Customization | Adjustable by Country |
FXS Loop Resistance Limits | Up to 600 Ohms (Short), Up to 1400 Ohms (Long) |