VoIP Virtual PBX

• 4 FXS + 1 FXO; or 5 FXO
• Extreme Temp (-40°C to +80°C) Optional
• Audio Codes Standards
  • G.711 ALAW/ULAW
  • G.726-32
  • T.38 Fax
• Internal Address Book
• Compatible with SIP
• Manage via Web, SNMP or Telnet
• Remote Firmware Upgrade
• Meets or Exceeds IEC 61850-3, IEEE 1613, & NEMA TS-2, Standards
• Member of the JumboSwitch® Product Family

Application 1: Connecting PBX ports to Phones in Remote Sites

As shown in the diagram below, this application connects a central PBX to remote (i.e. beyond the capabilities of a copper connection) sites with a small number of analog phones. The combination of TC3848-1 (FXS) and TC3848-2 (FXO) modules offer transparent and dedicated connectivity between remote analog phones and a central PBX over a JumboSwitch optical fiber Ethernet/IP backbone. Examples of such deployments include railroads, freeways, factories, college campuses, military installations, oil refineries, etc.

Click to enlarge

Example 1. Internal Call

1. In the figure above, the user on extension #100 wants to call extension #120.
2. As soon as the user goes off-hook, a dedicated preexisting connection between the two TC3848-1 (FXS port at extension #100) and TC3848-2 (FXO port at the PBX site) interface cards alert the PBX about the offhook.
3. The PBX sends the dial tone to the user and the user dials extension #120 which is on a different FXS port in a remote JumboSwitch location.
4. The PBX establishes the connection.

Example 2. External Call

1. The user on extension #100 goes off-hook.
2. The PBX sends a dial tone.
3. The user dials "9" to get PSTN dial tone and dials outside number.

Example 3. Incoming External Call

1. For incoming outside calls, the PBX answers and redirects to extension #100.

Application 2: TC3848 Modules Acting as Distributed PBX

In this application, the TC3848-1 (FXS) modules are used as a full featured distributed PBX with all popular features including: call forwarding, three-way calling, call waiting, caller ID, hunt groups, etc. Please refer to the complete feature list on the next page.

The TC3848-1 (FXS) module supports this application with or without an external Session Initiation Protocol (SIP) server. As shown in the diagram below, the entire functionality of a central PBX is replaced by this interface card.

Without a central PBX or SIP server, any potential single point of failure is eliminated. This is a significant benefit , particularly in industrial mission critical environments. Connectivity to the PSTN network is provided either by using the FXO port on the TC3848-1 module or via one of the FXO ports on the TC3848-2 module.

Example 1. Internal Call

1. The user on extension #100 goes off-hook.
2. In this case, the JumboSwitch TC3840-1 sends a Dial Tone.
3. 3. The user dials extension #120 and the connection is established with extension #120 through the JumboSwitch backbone ring.

Example 2. External Call

1. For outgoing calls to PSTN network, the user simply dials "9" followed by "#" to get a PSTN Dial Tone.

1. TC3848-14 FXS + 1 FXO
2. TC3848-25 FXO

1. Voice CodecG.711 ALAW, G.711 ULAW, G.726-32, T.38 Fax, G.729 Optional
2. Silence SuppressionVAD, CNG
3. Adaptive Jitter Buffer300 msec

1. RTP/RTCPRFC 3350, 3551, 2198
2. DTMF RelayRFC 2833

1. VoIP Signaling ProtocolsSIP - RFC 3261, 3262, 3263, 3264, 2327
2. Ethernet ProtocolsHTTP, IPv4, TCP, UDP, ICMP, ARP,
3. Ethernet Protocols (cont.)DNS, IEEE 802.1p/Q QoS, IEEE 803/3u/3x

1. Maximum Ringer Load (REN)5
2. Short/Long Haul
3. Ringer Voltage65Vrms
4. Distance18,000 feet

1. System StatusPWR A, PWR B, SRV, BP, Vcc, ALM
2. PhoneRing, Hook
3. EthernetLink, Duplex

1. Standard12VDC
2. Optional24, -48VDC, 90-260 VAC, 50/60Hz
3. Power Consumption<10W

1. Hi-Temp-20°C to 70°C
2. Extreme Temp-40°C to 80°C

1. Temperature-40°C to 90°C
2. Humidity95% non-condensing

1. Height(38.9 mm) 1.53"
2. Width(185.4 mm) 7.3"
3. Depth(248.7 mm) 9.79"
4. Weight(0.4 kg) 1.0 lb