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Data Sheet

Digital T1/E1 Packet Voice
Trunk Network Module

The Digital T1/E1 Packet Voice Trunk Network Module provides a flexible and scalable T1/E1 voice solution for Cisco 2600 and 3600 series multiservice Modular Access routers and supports up to 60 voice channels in a single network module. A single packet voice trunk network module supports both on-premise and off-premise connections to both Private Branch Exchanges (PBXs) and Public Switched Telephone Networks (PSTNs). These products are ideal for enterprise branches, large businesses and service providers wishing to migrate to packet-based multiservice infrastructures. This network module leverages existing legacy telephony equipment investments in addition to providing the ideal gateway interface for IP telephony within the Cisco Architecture for Voice, Video and Integrated Data (AVVID). It also enables the deployment of new packet voice applications while reducing recurring telephony charges.


Figure 1: Digital T1/E1 Packet Voice Trunk Network Module (NM-HDV-2E1-60 Pictured)


 

The Digital T1/E1 Packet Voice Trunk Network Module uses a real-time cpu and powerful digital signal processors (DSPs) which support all functions needed to provide the highest levels of voice fidelity and quality, eliminating the processing burden from the Cisco 2600 or 3600's main CPU. These DSPs can be scaled to support from six to 60 voice channels in a single Network Module using a number of different voice compression algorithms. The packet voice trunk network modules include a MultiFlex Voice/WAN interface card (VWIC) which offer single and dual port T1 or E1 interfaces for additional versatility and scalability. This flexibility allows voice and fax traffic to travel cost-efficiently across a user's wide area network (WAN) or directly over the PSTN.

The Digital T1/E1 Packet Voice Trunk network module combined with the Cisco 2600/3600 series multiservice access routers make an ideal single-box solution for packetized voice in branches and regional offices. Up to six packet voice trunk network modules can be configured in a single modular access router, supporting from 6 to 360 voice channels. Now, enterprise offices of several hundred users can deploy multiservice networking using a single box solution. Service providers, providing data and telephony managed services can connect a single platform to their central offices or points of presence (POPs) with a single high-speed data connection. The packet voice trunk network modules seamlessly interoperate with smaller and larger multiservice platforms from Cisco.

The Digital T1/E1 Packet Voice Trunk Network Module provides an ideal migration path to a multiservice network. Customers can gradually shift voice traffic from traditional circuit-switched networks to a single infrastructure carrying data, voice and video over packet networks without replacing any legacy PBX and key communication system equipment. This network module also provides the perfect solution for PBX and PSTN access to IP telephony in the Cisco AVVID architecture.

With connectivity support for over 90% of the world's medium and large traditional circuit-switched PBXs and PSTNs, the Digital T1/E1 Packet Voice Trunk Network Module provides every Enterprise the ability to integrate voice and data into a single multiservice infrastructure. As a result Multinational Enterprises can be prepared to implement new integrated applications immediately.

The Digital T1/E1 Packet Voice Trunk Network Module provides:

bulletThe gateway interface to PBXs to route voice along with data and video over a single data infrastructure

 
bulletThe gateway to the PSTN allowing users to gain access to the public telephone network to and from traditional PBX, phone, fax, key communication systems, as well as IP telephony as an integral part of the Cisco AVVID architecture

 
bulletSupport for VoIP, VoFR and VoATM (AAL5)

 

Key Features and Benefits

Scalability

bulletScales to meet Enterprise office requirements from small offices to large corporations

 
bulletInteroperable with Cisco multiservice voice and data products (such as 1750, MC3810, 2600, 3600, 7200, 7500, 5300, 5800, Cisco IP Phones, IP-PBX and Catalyst Switches)

 
bulletThe packet voice trunk network module is shared across Cisco's entire line of modular access routers giving a scalable voice solution for branch, regional, and headquarter offices with six to 360 voice channels in a single box solution

 
bulletProvides Enterprises and managed service providers the ability to scale to any size campus using Cisco gateways

 
bulletIncreases voice capacity without requiring the replacement of existing Cisco 3600 and 2600 Series routers

 
bulletEnables the administration of large dial plans via H.323 v2/v1 gateway and gatekeeper interoperability and support

 

Flexibility

bulletProgrammable digital signal processors can support G.711, G.723, G.726, G.728, G.729 and G.729a/b for customized solutions to meet the need for high voice quality and bandwidth efficiency

 
bulletPacket Voice Digital Signal Processor Modules (PVDM-12=), provide the ability to increase the voice processing capabilities within this single network module

 
bulletSingle or dual connections to PBXs, PSTNs or both using E1 or T1 interfaces via either a single or dual port E1 or T1 MultiFlex Voice/WAN interface card (VWIC) with integrated T1 CSU/DSU or E1 DSU

 
bulletModular voice processing on the packet voice trunk Network Module, the Cisco 2600 and 3600 provide the power to support additional office requirements such as routing, dial concentration, firewall and VPN

 

Feature Summary


Table 1: Digital T1/E1 Packet Voice Trunk Network Module Feature Summary

 
Feature Benefits
Scalable from 6 to 60 Voice Channels Single Network Module scales using from one to five 12-channel packet voice DSP module (PVDM-12) upgrade SIMMs to support from 6 to 60 voice channels.
Platform Voice Scalability to 360 Voice Channels Enables Cisco 2600 or 3600 series modular access routers to scale from 6 to 360 voice channels in a single multiservice router solution.
Network Module Enterprises and service providers can use a single box to support data and telephony services by sharing this Network Module with other interfaces in the Cisco 2600 and 3600 series modular access routers.
Standards-Based PCM Encoding Standards-based ITU-T G.711 PCM encoding provides 64 kbps analog to digital conversion using u-law or A-law.
Standards-based Compression Algorithm Support Users can choose to either transmit voice across their networks as uncompressed PCM (G.711, u-law and A-law) or compressed from 5.3 kbps to 32 kbps using standards-based compression algorithms (G.729, G.729a/b, G.723.1, G.726, G.728).
Fax Support Transmit Group III fax over any voice channel without sacrificing voice processing resources regardless of compression type.
Voice over IP Transmit data, voice, and video across a single frame relay, ATM, ISDN, channelized, or multilink point-to-point protocol (MLPPP) network.
Voice over Frame Relay Leverage existing or new frame relay network by transporting voice directly over this network using standards based transport methods (FRF.11) combined with standards based fragmentation for data (FRF.12). VoIP can also be transmitted over Frame Relay.
Voice over ATM Transport voice directly over ATM networks using AAL 5 encapsulation. Leverages existing ATM networks as a direct transport method for voice. VoIP can also be transported over ATM (VoATM requires ATM network modules such as IMA or OC-3).
Connection Trunk Creates a tie-line replacement structure while only consuming bandwidth during a call (digital-to-digital, digital-to-analog, or analog-to-analog capabilities).
Busy Out Automatically busy out the desired trunk line to the PBX when a direct WAN or LAN connection to the router is down.
Toll Bypass Reduce or eliminate toll charges assessed by long distance and local carriers by transporting voice and fax traffic across the enterprise intranet, LAN, metropolitan-area network (MAN), or WAN.
Integrated Data WAN Support Connect one or twoT1 or E1 interfaces on this network module as a WAN interface either as one or multiple groups of DS0's or as an entire T1 or E1 frame while still providing packet voice support for connections to PBXs and the PSTN.
LVBO (Local Voice Busy-Out) Automatically busy out any desired voice trunk line (or individual DS0s) to a PBX or PSTN when a direct WAN or LAN connection to the router is down. Also, busy out a far end trunk connection when configured for Connection Trunk.
Call Admission Control using RTR Uses Response Time Reporter (RTR) to determine latency, delay and jitter and provide real-time ICPIF calculations before establishing a call across an IP infrastructure. RTR packets emulate voice packets receiving the same priority as voice throughout the entire network. A superior method to data and ping packets for determining congestion levels.
Off-premise Extension (OPX) Extends the capability of legacy PBX to off-premise phones.
Voice Activity Detection (VAD) Consume bandwidth during a call only when there is voice traffic to send (silence suppression).
Comfort Noise Generation While using VAD, the DSP at the destination emulates background noise from the source side, preventing the perception that a call is disconnected.
Circuit Switched Leased Line Replacement Businesses incur significant recurring monthly costs for leased lines purely for the interconnection of telecom PBXs and switches. This product gives these enterprises the ability to remove these costly rigid-bandwidth leased lines and replace them with flexible bandwidth lines, which will be used to carry data, voice, and video. The ability to support proprietary PBX signaling types exists by using connection trunking and transparent CCS.
Private Line Automatic Ringdown (PLAR) Provides a direct connection to another digital or analog voice port by lifting a telephone handset on one end.
H.323 version 1 and 2 Support Uses industry-standard signaling protocols for call setup between gateways, gatekeepers, and H.323 end points (such as Intel Internet Phone or Microsoft Netmeeting).
DTMF Relay Carries DTMF tones/information out-of-band for clearer transmission and detection.
Authentication, Authorization, and Accounting (AAA) Supports debit and credit card (prepaid and post-paid calling card) applications.
Interactive Voice Response Support (IVR) Utilizes IVR to provide automated-attendant, voice-mail support, and call routing based on desired service.
Open Settlement Protocol Support (OSP) Provides the ability to settle account billing between service providers who are sharing resources to expand geographical coverage using third-party tools and standards-based OSP.
Any Call to Any Call with end-to-end Interoperability Interoperates with Cisco IP phones, analog phones, fax machine connections, and PBX connections to and from any other Cisco voice enabled product.
Gateway for legacy PBXs, Phones, Fax Machines, and Key Communication Systems to PSTN Enables a connection for incoming and outgoing calls to and from the PSTN originating from and destined for legacy PBXs, phones, fax machines, and key communication systems connected to a data, voice, and video infrastructure.
Integrated Add/Drop Multiplexer Performs add/drop multiplexing for voice within a dual-port voice Network Module. Eliminates the requirement, maintenance, support, and expense found when using an external add/drop multiplexer.
AVVID Interoperable Interoperable within Cisco's AVVID architecture.
Call Control Signaling Supports H.323 V1/V2 and MGCP call control protocols.
Gateway for IP phones to PSTN or classic PBXs Enables a connection for incoming and outgoing calls to and from the PSTN or classical PBXs using Cisco IP phones.
 

Feature Highlights

Voice Channel Support

bulletUp to 60 channels of medium-complexity voice or fax-relay (G729a/b, G726, G.711, Group 3 FAX up to 14.4K)

 
bulletUp to 30 channels of high-complexity voice or fax-relay (G729, G723.1, G728)

 
bulletScalable number of on-board DSPs using PVDM-12=

 

Voice Feature Support

bulletPrivate line automatic ring-down (PLAR)

 
bulletLocal Voice Busy-Out (LVBO)

 
bulletConnection trunk

 
bulletPBX tie-line replacement

 
bulletAnswer-address, incoming-called-number on dial-peers

 
bulletEcho cancellation (up to 32 ms configurable)

 
bulletSilence suppression, voice activity detection (VAD)

 
bulletComfort noise generation

 
bulletHunt groups across cards

 
bulletIntegrated add/drop multiplexer (drop and insert)

 
bulletLED indicators for voice processing resources and port status

 

Telephony Interface Signaling Support

bulletT1 and E1 PRI Q.931 user side and network side (NET5)

 
bulletT1 and E1 CAS

 
bulletT1 and E1 PRI QSIG

 
bulletE1 MelCAS

 
bulletE1 R2 CAS

 
bulletT1 and E1 Transparent CCS (with Multi-D channel)

 
bulletE&M (wink, immediate, delay), FXO/FXS loop-start and ground-start signaling

 
bulletInbound signaling (such as DTMF, MF support)

 

Cisco IOS and Platform Support

bulletFully supported via IOS CLI including device configuration, monitoring, link status, security, Layer 2 and 3 protocol configuration and management, and call history

 
bulletMPLS support

 
bulletSupported on all Cisco 3600 and 2600 series routers

 

Standards Support

bulletH.323 version 1 and 2 feature support

 
bulletH.323 CODEC-negotiation

 
bulletH.323 gateway RAS support (version 1 / version 2)

 
bulletSupports ITU Standard Compression Algorithms (G.729, G.723.1, G.729a/b, G.711, G.728, G.726)

 

Country Support

bulletWorld-wide country support

 

Traditional Circuit Switched PBX Support

bulletQualified PBX interoperability for Lucent Definity series, Nortel Meridian, and ROLM/Siemens HICOM, NEC NEAX 2400, Toshiba Strada DK424, Mitel 2000SX, Ericsson, Nortel SL-1 (other PBXs continue to be certified)

 

Network Management Support

bulletSNMP protocol compliant

 
bulletManageable via a MIB browser

 
bulletCiscoView interface for configuration

 
bulletConfigMaker

 
bulletCisco Voice Manager (CVM) supported, version 2.0

 
bulletNetSys supported

 

Technical Specifications


Table 2: Digital T1/E1 Packet Voice Trunk Network Module Technical Specifications

Specification Standard
Quality of Service (QoS) Standards IETF: WFQ, WRED, CRTP, PQ, and other IOS capabilities
Signaling Standards ITU-T: H.323 v1 and v2

T1 CAS

E&M Type I, II, III, IV

E&M Wink Start, Wink Immediate, Wink Delay

FXS Loop-Start, Ground-Start

FXO Loop-Start, Ground-Start
Clock Support Pull-in range +/-64 PPM, Pass-through +/-32 PPM
Safety Standards UL 1950 3rd. edition

CSA 950, 1995 version

IEC 950

EN 60950

AS/NZS: 3260 with amendment 134
Maximum Simultaneous Call Setup 60 Calls per Network Module
Interface Type RJ48 Connector
Telco Standards AT&T Accunet (62411)

ATT 54016
Line Bit Rate T1, 1.544Mbps

E1 2.048Mbps
Line Code AMI, B8ZS (T1)

HDB3 (E1)
AMI Ones Density Enforced for N x 56kbps channels
Framing Format D4 (SF) and ESF
Output level (LBO)  0, -7.5, or -15 dB
Input Level +1dB0 down to -24 dB0
Line Frequency 1.544 Mbps +/- 75 bps/32PPM

2.048 Mbps +/- 75 bps/32PPM
DTE/DCE Interface (VIC mode) G.704/structured
Diagnostic Loopback Support ANSI T1.403 Annex B/V.54 loopup/down code recognition, network loopback, and user initiated loopbacks, network payload loopback, local DTE loopback, remote line (codes: V.541, loop up, and loop down)
Alarm Detection Alarm indication signal (AIS), remote alarm, far-end block error (FEBE), out of frame (OOF), cyclic redundancy check (CRC) multiframe OOF, signaling multiframe OOF, frame errors, CRC errors, Loss of network signal (red alarm), loss of network frame, receive (blue alarm) (AIS) from network, receive (yellow) from network Performance Reports / Error Counters CRC, errored seconds, burst errored seconds, severely errored seconds, Ft and Fs framing errors for SF framing, FPS framing errors for ESF framing, 24-hour history stored in 15-minute increments
LED Indicators Data carrier detect (CD)

Loopback (LP)

Alarm (AL)

Voice DSP processing status
DSU/CSU Selectable DSX-1 cable length in increments from 0 to 655 feet in DSU mode

Selectable DS1 CSU line build-out: 0, -7.5, -15, and -22.5 dB

Selectable DS1 CSU receiver gain: 26 or 36 dB
Physical Interface Standards T1 ANSI, ATT T1.1, ANSI T1.403
Environmental Operating temperature: 0 to 40º C (32 to 104° F)

Storage temperature: -25 to +70º C (-13 to 158° F)

Relative humidity: 5 to 85% noncondensing operating; 5 to 95% noncondensing, nonoperating
MTBF NM-HDV-1T1-24E; 381,087 to 467,253 hours

NM-HDV-2T1-48; 366,394 to 445,354 hours
 

Management


Table 3: Digital T1/E1 Packet Voice Trunk Network Module Management

Type Description
Telnet / Console Remote and local configuration, monitoring, and troubleshooting from Cisco IOS CLI
SNMP Router and DSU/CSU managed by single SNMP agent;

Router/DSU/CSU appear as single network entity to user standard MIB (MIB II);

Cisco integrated DSU/CSU MIB;

RFC 1406 T1 MIB, including alarm detection and reporting
SNMP Traps Generated in response to alarms
 

Part Numbers


Table 4: Digital T1/E1 Packet Voice Trunk Network Module Part Numbers

Product Number Description
NM-HDV-1T1-12(=) Single-port, 12-channel T1 voice/fax Network Module (supports 12-channels of medium complexity VoCoders: G.729a/b, G726, G.711 and fax or 6 channels of G.726, G.729, G.723.1, G.728, G729a/b, G.711 and fax). This product can be upgraded to an NM-HDV-1T1-24 simply by adding one additional PVDM-12= module.

This complete bundle includes one (1) NM-HDV=, one (1) PVDM-12=, and one (1) VWIC-1MFT-T1
NM-HDV-1T1-24(=) Single-port, 24 channel T1 voice/fax network module (supports 24 channels of medium complexity VoCoders: G.729a/b, G.726, G.711, and fax or 12 channels of G.726, G.729, G.723.1, G.728, G.729a/b, G.711, and fax). This product can be upgraded to an NM-HDV-1T1-24E simply by adding two additional PVDM-12= modules.

This complete bundle includes one (1) NM-HDV=, two (2) PVDM-12=, and one (1) VWIC-1MFT-T1.
NM-HDV-1T1-24E(=) Single-port, enhanced 24-channel T1 voice/fax network module supports 24 channels of high and medium complexity VoCoders: G.729a/b, G.726, G.729, G.728, G.723.1, G.711, and fax. This is the Enhanced version of the NM-HDV-1T1-24 (i.e., this product has two more PVDM-12= modules than the NM-HDV-1T1-24).

This complete bundle includes one (1) NM-HDV=, four (4) PVDM-12=, and one (1) VWIC-1MFT-T1.
NM-HDV-2T1-48(=) Dual-port, 48 channel T1 voice/fax network module (supports 48 channels of medium complexity VoCoders: G.729a/b, G.726, G.711, and fax or 24 channels of G.726, G.729, G.723.1, G.728, G.729a/b, G.711, and fax) and contains an integrated add/drop multiplexer.

This complete bundle includes one (1) NM-HDV=, four (4) PVDM-12=, and one (1) VWIC-2MFT-T1-DI.
NM-HDV-1E1-12(=) Single-port, 12-channel E1 voice/fax Network Module (supports 12-channels of medium complexity VoCoders: G.729a/b, G726, G.711 and fax or 6 channels of G.726, G.729, G.723.1, G.728, G729a/b, G.711 and fax). This product can be upgraded to an NM-HDV-1E1-30 simply by adding two additional PVDM-12= modules.

This complete bundle includes one (1) NM-HDV=, one (1) PVDM-12=, and one (1) VWIC-1MFT-E1
NM-HDV-1E1-30(=) Single-port, 30 channel E1 voice/fax network module (supports 30 channels of medium complexity VoCoders: G.729a/b, G.726, G.711, and fax or 18 channels of G.726, G.729, G.723.1, G.728, G.729a/b, G.711, and fax). This product can be upgraded to an NM-HDV-1E1-30E simply by adding two additional PVDM-12= modules.

This complete bundle includes one (1) NM-HDV=, three (3) PVDM-12=, and one (1) VWIC-1MFT-E1.
NM-HDV-1E1-30E(=) Single-port, enhanced 30-channel E1 voice/fax network module supports 30 channels of high and medium complexity VoCoders: G.729a/b, G.726, G.729, G.728, G.723.1, G.711, and fax. This product is the Enhanced version of the NM-HDV-1TE-30 (i.e., this product has two more PVDM-12= modules than the NM-HDV-1E1-30).

This complete bundle includes one (1) NM-HDV=, five (5) PVDM-12=, and one (1) VWIC-1MFT-E1.
NM-HDV-2E1-60(=) Dual-port, 60 channel E1 voice/fax network module (supports 60 channels of medium complexity VoCoders: G.729a/b, G.726, G.711, and fax or 30 channels of G.726, G.729, G.723.1, G.728, G.729a/b, G.711, and fax) and contains an integrated add/drop multiplexer.

This complete bundle includes one (1) NM-HDV=, five (5) PVDM-12=, and one (1) VWIC-2MFT-E1-DI.
NM-HDV= High-density voice/fax network module spare. This product can be used as the foundation to build any of the above products using any combination of VWICs and PVDM-12= modules.

This product is only orderable separately as a spare.
PVDM-12= 12-channel packet voice DSP module upgrade spare. This product can be used in combination with the NM-HDV= to build any of the above products using any combination of VWICs and PVDM-12= modules. This product can also be used to upgrade the NM-HDV-1T1-24 or NM-HDV-1E1-30 to the Enhanced version of these products.

This product is only orderable separately as a spare.
 

Platform Maximum Network Modules Supported


Table 5:

  2600 Chassis Network Module Slot 3620 Chassis Network Module Slots 3640 Chassis Network Module Slots 3660 Chassis Network Module Slots
Maximum Number of T1 or E1 Voice Ports Supported (maximum number of voice channels supported) Two T1 or Two E1

(48 voice channels - T1)

(60 voice channels - E1)

 Two T1 or Two E1

(48 voice channels - T1)

(60 voice channels - E1)

 Five T1 or Four E1

(120 voice channels - T1)

(120 voice channels - E1)

 Twelve T1 or Twelve E1

(288 voice channels - T1)

(360 voice channels - E1)
 

Note: Maximum number of voice channels supported decreases when using Compressed RTP (CRTP).
 

Cisco IOS Software and Memory Support


Table 6: Digital T1/E1 Packet Voice Trunk Network Module IOS Software and Memory Support

Product Number Platform IOS SW Version IOS Feature Sets Minimum DRAM Memory Minimum FLASH Memory
All Digital T1 Packet Voice Trunk Network Modules Cisco 2600 and 3600 series 12.0(5)XK only or 12.0(5)XK1 only (see below for requirements beyond these two Cisco IOS Plus images) All Plus Feature Sets (some IOS Plus Feature Sets require additional DRAM and Flash Memory) 32 Mbyte for one or two T1 voice ports per chassis

64 Mbyte for two to eight T1 voice ports per chassis

128 Mbyte for greater than eight T1voice ports per chassis

 8 MB
All Digital E1 and T1 Packet Voice Trunk Network Modules Cisco 2600 and 3600 series 12.0(7)XK, 12.0(7)T, 12.1(2)T or greater All Plus Feature Sets (some IOS Plus Feature Sets require additional DRAM and Flash Memory) 48 Mbyte for one or two T1 or E1 voice ports per chassis

64 Mbyte for two to eight T1 or E1 voice ports per chassis

128 Mbyte for greater than eight T1 or E1 voice ports per chassis

 8 MB
 

Country Approval


Table 7: Digital T1/E1 Packet Voice Trunk Network Module T1 Interface Country Approval

Country Specification
US US (UL 1950, T1)

FCC Part 68

FCC Part 15 Class B, T1
Canada CS-03

CSA 950, T1

CSA C108.8 Class A, T1
Japan VCCI class 2

VCCI:V-3/97.04, T1

JATE green book,

IEC950
 


Table 8: Digital T1/E1 Packet Voice Trunk Network Module E1 Interface Country Approval

Country Specification
Austria (CE) Belgium (CE Denmark (CE) Finland (CE) France (CE) Germany (CE) Gibraltar (accepts CE) Greece (CE) Ireland (CE) Italy (CE) Liechtenstein (accepts CE) Luxembourg (accepts CE) Malta (accepts CE) Monaco (accepts CE) Netherlands (CE) Norway (CE) Portugal (CE) Spain (CE) Sweden (CE) Switzerland (CE) U.K. (CE) EMC EN55022/EN50082/EN61000

Safety EN60950

Telecom CTR13/CTR12
New Zealand EMC AS/NZS 3548

Safety AS/NZS 3260

Telecom TNA 117
China EMC CISPR22

Safety EN60950
Singapore EMC EN55022/CISPR22

Safety EN60950

Telecom DLCN1/DLCN2
Poland EMC EN55022/EN50082/EN61000

Safety EN60950

Telecom CTR13/CTR12
Australia EMC AS/NZS 3548

Safety AS/NZS 3260

Telecom TS016
 

E1 R2 Register, Line and Country Variant Signaling Support

bulletITU Q411, Q421, ITU Supplement 7, Compelled Register Signaling, Non-Compelled Register Signaling, Semi-Compelled Register Signaling

 
bulletCountry Variants: Argentina, Australia, Bolivia, Brazil, Bulgaria, China, Colombia, Costa Rica, Croatia, East Europe, Ecuador ITU, Ecuador LM, Greece, Guatemala, Hong Kong [China variant], India, Indonesia, Israel, ITU, Korea, LAOS Network (Thailand Variant), Malaysia, Malta, New Zealand, Paraguay, Peru, Philippines, Saudi Arabia, Singapore, South Africa Panaftel, Telmex, Telnor, Thailand, Uruguay, Venezuela, Vietnam

 

Product Relationship

Collectively, this set of products is referred to as the Digital T1/E1 Packet Voice Trunk Network Modules. Figure 2 shows the relationship of all of these products (T1 versions are shown below only, E1 versions follow the same structure).


Figure 2: Digital T1/E1 Packet Voice Trunk Network Module Product Relationships (T1 shown only)



 This product is available now, for more information please contact us.


 

 

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