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- Description
- Specifications
The NM-HD-1V is a Cisco 1-slot, 4-channel high-density voice network module, known as the 1-slot IP communications voice/fax network module. It has one digital signal processing (DSP) chip, mounted on the board and not field-replaceable. The module has one interface card slot for a single voice interface card (VIC) or voice/WAN interface card (VWIC), and that card provides the physical connection to the telephony equipment or network.
Voice network modules convert telephone voice signals into a form that can travel over an IP network, which lets a modular access router move calls and faxes as voice over IP alongside data on LANs, MANs and WANs. The module has an enable (EN) LED showing that it has passed its self-tests and is available to the router, and it has no other LEDs.
The NM-HD-1V fits the Cisco 2600 series, 2811, 2821, 2851, 3640, 3660, 3700 series and 3800 series routers. The 2-slot sibling is the NM-HD-2V with 8 channels, and the NM-HD-2VE has 48 channels. More voice parts are grouped in Cisco interface cards.
| Part number | NM-HD-1V |
| Type | 1-slot IP communications voice/fax network module |
| Channels | 4 |
| Interface card slots | 1 (VIC or VWIC) |
| DSPs | 1, on board and not field-replaceable |
| LEDs | enable (EN) only |
| Sibling modules | NM-HD-2V (2 slots, 8 channels), NM-HD-2VE (2 slots, 48 channels) |
| Compatible with | Cisco 2600 series, 2811, 2821, 2851, 3640, 3660, 3700 series, 3800 series routers |