DID
Quad DID Interface Card
The DID interface card is available in two variations:
- The Quad card isolates up to four lines using a single fiber link.
- The Dual card can isolate up to two lines using a single fiber link.
The CO side used an FXS interface card. It is powered from an express pair, or from a power source at the CO side (a jumper setting is required for this option). The card interfaces with the CO and provides an off-hook circuit, line polarity detection, ring detection, and battery disconnect detection.
The Station side uses an FXO interface card. This card is powered from the backplane supply of -48 Vdc. It provides battery feed with polarity reversal, ringing, and battery disconnect to the station side equipment.
Applications:
Direct Inward Dialing (DID).
Will reproduce on-hook battery reversal for line maintenance.
Quad DID Interface Card (FXO Station side)
Features
- Local powered
- Available as a multi-mode or single-mode card
- Available with SC or ST connectors
| PRODUCT | DESCRIPTION | DOWNLOAD |
|---|---|---|
| 720700MST 720700SSC | Quad OPX FXO Station side interface card | User guide Specification |
| 720710MST 720710SSC | Quad OPX FXS CO side interface card | User guide Specification |
Dual OPX Interface Card
(FXO Station and FXO CO side)
The DID interface card is available in two variations:
- The Quad card isolates up to four lines using a single fiber link.
- The Dual card can isolate up to two lines using a single fiber link.
The CO side used an FXS interface card. It is powered from an express pair, or from a power source at the CO side (a jumper setting is required for this option). The card interfaces with the CO and provides an off-hook circuit, line polarity detection, ring detection, and battery disconnect detection.
The Station side uses an FXO interface card. This card is powered from the backplane supply of -48 Vdc. It provides battery feed with polarity reversal, ringing, and battery disconnect to the station side equipment.
Applications:
Direct Inward Dialing (DID).
Will reproduce on-hook battery reversal for line maintenance.
NOTE: 720750MST, 720750SSC Not compatible with POTS (no ringing detection/generation)
Features
- Local powered
- Available as a multi-mode or single-mode card
- Available with SC or ST connectors
| PRODUCT | DESCRIPTION | DOWNLOAD |
|---|---|---|
| 720740MST 720740SSC | Quad card isolates up to four lines | User guide Specification |
| 720750MST 720750SSC | Dual card can isolate up to two lines | User guide Specification |
