In this section:
FXS Interface Card - Part Number 404-40179-nnn
Overview
The Sonus SBC 2000 FXS Interface Card comprises 24 FXS interfaces on a single RJ-21 connector. The Sonus SBC 2000 supports up to a maximum of 48 FXS ports using two FXS Interface Cards.
Interface Specifications and Limitations
Item | Value/Dimension |
|---|---|
Maximum external Off-Hook resistance | 600 ohms (This includes the resistance of the cable and the DC resistance of the termination device) |
Typical Loop Current Limit | 22 ma/port |
Typical FXS Port Ringing Voltage | 45V RMS with 3 REN load |
Maximum Loop Length | 3000m |
| Cable Gauge | 24 AWG |
Dimensions and Weight
| Card | Height mm/in. (PCB only) | Width mm/in. (PCB only) | Height mm/in. (Includes Connector overhang) | Width mm/in. (Includes Connector overhang) | Total Weight (lbs) |
|---|---|---|---|---|---|
| FXS | 200.0/7.87 | 275.0/10.83 | 249.7/9.83 | 307.5/12.11 | 0.9 |
Environmental Ranges (Operation and Storage)
Environmental Parameter | Specification |
|---|---|
Operating Environmental Conditions | Temperature: 5º to 40º Celsius |
Storage Environmental Condition | Temperature: -40º to 70º Celsius |
RJ-21 Connector Pinouts
RJ-21 Connector Pinouts
RJ-21 connector pinout:
Port Number | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
TIP | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 |
RING | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 |
The last pair of the RJ-21 connector (pins 25 and 50) are routed to an isolated contact to be used for a future feature.
Circuit Protection
Protection circuits are included on the FXS card. The FXS circuit on the SBC 2000 meets the requirements of UL/EN60950.
The FXS circuits also include fusing and protection devices to comply with the following:
- Telcordia GR-1089
- ITU-T K.20/K.21
Installation and Service
The Sonus SBC 2000 FXS Interface card have no user serviceable components. Installation and removal of of the Sonus SBC 2000 FXS Interface Card from the chassis should only be performed by qualified service personnel.
Overview
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