valutazioni - 4, GPA: 3.8
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Voice network modules convert telephone voice signals into a form that can be transmitted over an IP network. Voice network modules convert telephone voice signals into a form that can be transmitted over an IP network. These modules have one or two slots for installing supported interface cards. Voice interface cards (VICs) or voice/WAN interface cards (VWICs) installed in the voice network module provide physical connections to the telephony equipment or network, and are connected using the appropriate cables. You can install one voice interface card in a 1-slot voice network module, and two voice interface cards in a 2-slot module. Americas Headquarters: Cisco Systems, Inc., 170 West Tasman Drive, San Jose, CA 95134-1706 USA Connecting Cisco Voice Network Modules to the Network 2- and 4-Channel Voice Network Modules 2- and 4-Channel Voice Network Modules This section describes the following modules: • 1-slot 2-channel voice network module (NM-1V) (see Figure 1) • 2-slot 4-channel voice network module (NM-2V) (see Figure 2) Figure 1 1-Slot 2-Channel Voice Network Module (NM-1V) VOICE 2V V0V1 EN H10834 1 Figure 2 2-Slot 4-Channel Voice Network Module (NM-2V) Module VOICE 2V V0V1 EN Enable H10833 Module screw screw LED 4-, 8-, and 48-Channel High-Density Voice Network Modules This section describes the following modules: • 1-slot 4-channel high-density voice network module with one digital signal processor (DSP) (NM-HD-1V) (see Figure 3) • 2-slot 8-channel high-density voice network module with one DSP (NM-HD-2V) (see Figure 4) • 2-slot 48-channel high-density enhanced network module with 3 DSPs, supporting up to 8 analog or 48 digital channels (NM-HD-2VE) (see Figure 5) Caution To comply with the Telcordia GR-1089 NEBS standard for electromagnetic compatibility and safety, connect the 2-slot 48-channel high-density enhanced network module (NM-HD-2VE) only to intrabuilding or nonexposed wiring or cabling. The intrabuilding cable must be shielded and the shield must be grounded at both ends. 2 Connecting Cisco Voice Network Modules to the Network Connecting Cisco Voice Network Modules to the Network 60-Channel High-Density Voice Network Module Note For the NM-HD-1V, NM-HD-2V, and NM-DS-2VE network modules, DSPs are on-board and are not field-replaceable units (FRUs). Note The NM-HD-1V, NM-HD-2V, and NM-HD-2VE network modules replace the NM-1V and NM-2V network modules. The NM-1V and NM-2V network modules are still available for use on Cisco 2600 series, Cisco 3600 series, and Cisco 3700 series routers. Figure 3 1-Slot 4-Channel High-Density Network Module (NM-HD-1V) EN V0 NM-HD -1V Figure 4 2-Slot 8-Channel High-Density Voice Network Module (NM-HD-2V) 8903389034 V1 EN V0 NM-HD -2V Figure 5 2-Slot 48-Channel High-Density Voice Network Module (NM-HD-2VE) 89035 V1 EN V0 NM-HD -2VE 60-Channel High-Density Voice Network Module This section describes the 60-channel high-density voice (HDV) network module, shown in Figure 6. When used in conjunction with T1/E1 multiflex trunk interface cards and packet voice digital signal processor modules (PVDMs), this module is also called a digital T1/E1 packet voice trunk network module. Connecting Cisco Voice Network Modules to the Network 3 Connecting Cisco Voice Network Modules to the Network 60-Channel High-Density Voice Network Module Figure 6 60-Channel High-Density Voice Network Module (NM-HDV) NM-HDV BANK 4 BANK 3 BANK 2 V0 EHBANK 1 22160 BANK 0 The 60-channel HDV network module converts voice and fax into IP packets or frames that can be transmitted as VoIP over a variety of transport technologies (channelized T1/E1, Frame Relay, Asynchronous Transfer Mode (ATM), and others). The number of channels supported depends on the number of PVDMs installed: • Up to 6 channels per PVDM (30 channels for cards with 5 PVDMs) for high-complexity vocoders that support the following compression algorithms: G.711, G.726, G.729, G.723.1, G.728, and Fax Relay • Up to 12 channels per PVDM (60 channels for cards with 5 PVDMs) for medium-complexity vocoders that support the following compression algorithms: G.711, G.726, G.729a, and Fax Relay Both a 60-channel HDV network module and a voice interface card (VIC) are required to connect to the public switched telephone network (PSTN) or a PBX. One VIC (providing one or two T1/E1 line interfaces) can be installed in the HDV network module. Currently, only the 1- and 2-port T1/E1 multiflex trunk interface cards (VWIC-1MFT-T1, VWIC-2MFT-T1, and VWIC-2MFT-T1-DI) are supported using channel-associated signaling (CAS). In Cisco 3620 and Cisco 3640 routers, at least one other network module or WAN interface card (WIC) must be installed in the router to provide the connection to the IP LAN or WAN. In Cisco 3660 routers, a network module is required for WAN access or a direct connection is required for LAN access. In Cisco 2600 series routers, a WIC is required for WAN access or a direct connection is required for LAN access. Packet Voice DSP Module...