| Product Overview VCL-LD, E1 DCME (Digital Circuit Multiplication Equipment) Voice
Compression Equipment provides 30, "toll quality" voice channels using an 8:1
compression ratio, (10:1 without signaling channel) in a bandwidth of 256kbps. The
interface to the local PSTN network is ITU-T G.703, G.704 compliant E1 with signalling
support for R2, CAS (ABCD) Digital Signalling, PRI ISDN (Q.931), SS7 and C7 Signalling.
The VCL-LD, DCME is equipped with an Echo Cancellor (128ms. echo cancellation card).
Shelf Description
The VCL-LD, E1 DCME (Digital Circuit
Multiplication Equipment) is a 3U, 19 Inch Shelf, fitted with a backplane that provides
rear access of all external interfaces. The E1 interface, power input, alarm extention are
all accessed from the backplane.
VCL-LD, E1 DCME (Digital
Circuit Multiplication Equipment)
Front View of the Shelf
 Shelf Description
| Front View (Left to Right) |
Card Details |
Valiant Part No. |
| Slot 1: |
PS, Power Supply Card |
VCL-LD-110 |
| Slot 2 to Slot 6: |
VCC, Voice Compression Card |
VCL-LD-120 |
| Slot 7: |
DS-0, DS-0 Card |
VCL-LD-130 |
| Slot 8 to Slot 12: |
VCC, Voice Compression Card |
VCL-LD-120 |
| Slot13: |
DS-0, DS-0 Card |
VCL-LD-130 |
| Slot14 to Slot18: |
VCC, Voice Compression Card |
VCL-LD-120 |
| Slot 19: |
DS-0, DS-0 Card |
VCL-LD-130 |
| Slot 20: |
VCE, E1 Interface Card |
VCL-LD-140 |
| Slot 21: |
EC, Echo Canceller Card
(128ms Echo Cancellation) |
VCL-EC128 |
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