A DS3 line (also known as a T-3) is an ultra high-speed connection capable of transmitting data at rates up to 45 Mbps. A DS3 line is equal to approximately 672 (28 Spans * 24 DSO's) regular voice-grade telephone line. A DS3 line is comprised of 28 T1 lines, each operating at total signaling rate of 1.544 Mbps. Use this pane to configure a DS3 Interface. Once the TDM DS3 object is created the individual DS1's will need to be configured. See TDM Spans (DS3) in Related Topics on how to accomplish this.
Dialogic IMG EMS -> Logical IMG -> Physical IMG -> Facility -> TDM DS3
1 per Physical IMG
DS3_Configure Profile - 10.5.x
Right-click Facility and select New TDM DS3.
The Bearer ID:0 Pane appears. See Below
M13 - A type of framing that multiplexes individual DS1 channels to a DS3 Channel
CBIT (default) - M13 Framing with CBIT bit stuffing for synchronous operation.
Bearer - Automatically Populated and cannot be changed
Automatically populated with ID:0
Line length is selectable from a drop down menu. The selections are
0-225 ft (Default)
226-450 ft
Enabling this option allows loop-back to be configured from any “far-end” equipment connected on the other end of the line. These can be used to send and receive loop up codes and information from the far end T3 device. You can enable and disable through a drop down menu in this field.
Enable
Disable (Default)
FEAC alarms are sent from the remote end device towards the local device by means of the C bit in the Sub-frame. When a failure is declared on the remote end unit this is how it notifies the near end unit. Some FEAC Codes are shown below
DS3 Equip. Failure(Service Affecting) |
011001 |
DS3 LOS |
001110 |
DS3 OOF |
000000 |
DS3 AIS RCV |
010110 |
DS3 IDLE RCV |
011010 |
DS3 EQUIQ FAIL(NON-SERVICE AFFECT) |
001111 |
COMMON EQUIP. FAIL (NSA) |
011101 |
MULTIPLE DS1 LOS |
010101 |
DS1 EQUIP FAIL |
000101 |
SINGLE DS1 LOS |
011110 |
DS1 EQUIP FAIL(NON-SERVICE AFFECT) |
000011 |
FEAC Codes can be sent to put remote end equipment in loopback mode. There is a specific FEAC code to request ALL DS1's be put in loopback. There are also specific FEAC codes for each individual span offset. The local IMG can request that the far end put all DS1's in loopback (Send FEAC code to put ALL DS1's in loopback on remote node). If only one DS1 offset (for example offset 14) needs to be put in loopback then the local IMG CAN send the code value that corresponds to offset 14. Below are a few codes to accomplish this.
Line loopback activate |
000111 |
Line loopback de-activate |
011100 |
DS3 Line |
011011 |
No Loopback (Default) - Normal Operation
Local Loopback - Loops back the complete DS3 (Including Signaling/Framing) so that a far end piece of equipment can send a test such as a BERT test towards the local IMG.
Remote Loopback (CBIT Only) - The local IMG sends out a FEAC code to a far end piece of equipment telling it to go into loopback mode (Including Signaling/Framing) so the local IMG can send out a test such as the BERT test.
No Loopback (Default) - Normal Operation
Local Loopback - loops all of the individual DS1s within the DS3 but the DS3 framing\signaling is not looped back, “DS1 loop back” loops a single DS1 within the DS3.
Remote Loopback (CBIT Only) - The local IMG sends out a FEAC code to a far end piece of equipment telling it to loop all of the individual DS1s within the DS3 but the DS3 framing\signaling is not looped back.
Note: Following the request to put DS1 offset 14 in loopback, you CANNOT make another request for loopback on another span without first taking span 14 out of loopback.
Gives a status of DS3. (Inservice, Out of Service, Receiving Red, etc)
Are used to indicate framing or CP bit parity errors from the transmitter.
Shows Status of DS3 Loopback Mode.
Shows Status of ALL DS1 Loopback Mode.
DS3_Configure_Profile - 10.5.x