|
|
The Cisco Media Gateway Controller (MGC) product line consists of hardware and software packages that you can use to connect your packet data network to the Public Switched Telephone Network (PSTN). Cisco MGC products manage call signaling conversion between the PSTN and the packet data network, and depending on the product, Cisco MGC products can control the routing of calls across the PSTN or packet data network.
Cisco offers multiple Cisco MGC products, which are introduced in this chapter with the available product configurations and the hardware components used in these product configurations.
This chapter contains the following sections:
The Cisco SC2200 product is a signaling controller (SC) that converts telephony signals from one format to another. For example, the Cisco SC2200 converts SS7 signaling information from the PSTN to the signaling format required to establish calls between the PSTN and a packet data network.
The Cisco SC2200 is a product that is designed to work with other Cisco products as part of a Cisco solution. Table 1-1 lists solutions that use the Cisco SC2200 and the documents that introduce these solutions.
| Solution | Solution Introduction Document |
Cisco SS7 Dial Access Solution v2.0 | Cisco SS7/CCS7 Dial Access Solution System Integration Guide |
For more information on the solutions listed in Table 1-1 and how the Cisco SC2200 is used in these solutions, refer to the introduction document for that solution.
To install the Cisco SC2200, you will need to be familiar with the configuration options supported by the Cisco SC2200. The Cisco SC2200 for the Cisco SS7 Dial Access Solution v2.0 supports the following host configuration options:
This solution supports the following signaling network configuration options:
These configurations are described in the "Cisco MGC Product Configurations" section.
The Cisco VSC2700 product is a virtual switch controller (VSC) that performs telephony signal conversion and call routing in Enterprise ATM networks. The typical Cisco VSC2700 application supports multiple PBXs connected through PRI links to a Cisco LS1010 or Cisco MSR8540 media gateway, which also connects to an ATM network. PRI signaling is passed between the media gateway and the Cisco VSC2700 over a E1/T1 link. The Cisco VSC2700 translates the call setup information and directs the media gateways to set up a voice path across the ATM network. Call control messages are passed between media gateway and the Cisco VSC2700 over the control signaling network, which is typically an Ethernet LAN.
The Cisco VSC2700 is a product that is designed to work with other Cisco products as part of a Cisco solution. Table 1-2 lists solutions that use the Cisco VSC2700 and the documents that introduce these solutions.
| Solution | Solution Introduction Document |
Cisco Enterprise Voice Tandem Solution | Cisco VSC2700 Network Solution Integration Guidelines |
For more information on the solutions listed in Table 1-2 and how the Cisco VSC2700 is used in these solutions, refer to the introduction document for that solution.
To install the Cisco VSC2700, you will need to be familiar with the configuration options supported by the Cisco VSC2700. The Cisco VSC2700 for the Cisco Enterprise Voice Tandem Solution supports the following host configuration options:
This solution supports the following signaling network configuration options:
These configurations are described in the "Cisco MGC Product Configurations" section.
Figure 1-1 shows the general topology for all solutions that use Cisco MGC products.
All solutions include configurations that use one or two Cisco MGC hosts, one or more network signaling options, and one or more media gateways. Because many of the solutions support multiple combinations of these solution building blocks, the Cisco MGC product manuals organize installation and configuration around these building blocks. As you install and configure your solution, you can follow the instructions for the building blocks that apply to your solution.
The Cisco MGC product includes the Cisco MGC hosts and all equipment and interfaces that deliver PSTN signaling (SS7 and ISDN PRI signaling) to the Cisco MGC hosts. The Cisco MGC product does not include the media gateway or any control signaling network equipment, which is ordered separately. The solution is the combination of the Cisco MGC product, the control signaling network equipment, and the media gateway.
For instructions on installing and configuring your media gateway, refer to the documents listed in Table 1-3.
| Cisco Solution | Cisco Document |
|---|---|
Cisco SS7 Dial Access Solution v2.0 | Cisco SS7/CCS7 Dial Access Solution System Integration Guide |
Cisco Enterprise Voice Tandem Solution | Cisco VSC2700 Network Solution Integration Guidelines |
The following sections describe the Cisco MGC product configurations, which are divided into the host configuration options and the signaling network configuration options.
The Cisco MGC products support the following single and dual host configurations:
A simplex Cisco MGC host configuration uses a single Cisco MGC host computer for all signal processing. The Cisco MGC software runs on the following host computers:
Each of these host computers is described in detail later in this chapter.
The high-availability configuration uses two Cisco MGC hosts for signal processing. The two hosts are installed in a hot standby configuration where one host operates as the primary Cisco MGC host and the other host server operates as the standby Cisco MGC host. Figure 1-2 shows the high-availability configuration.
If a failure occurs in the active Cisco MGC host, the standby Cisco MGC host becomes the active Cisco MGC host. This transition from one host to another is commonly referred as failover. In order to facilitate failover, an A/B Switch is installed between the two host servers to switch signaling links from one host to the other. These signaling links are described later in this chapter.
As with the simplex configuration, the Cisco MGC software runs on the following host computers:
The Cisco MGC products support the following signaling configurations:
A-link signaling configurations are used to connect to an SS7 network through an access link. A-links connect the Cisco MGC host to an SS7 signaling transfer point (STP) in the SS7 network. In the A-link configuration, the signaling link connects directly to an interface card in the Cisco MGC host, as shown in Figure 1-3.
The A-link signaling configuration can be used with simplex and high-availability host configurations, and it supports V.35, T1, and E1 interfaces using signaling interface cards installed in the Cisco MGC host. Each interface supports a single DS0 signaling channel.
F-link signaling configurations are used to connect to an SS7 network through fully associated links. F-links connect the Cisco MGC host directly to a service switching point (SSP) or a service control point (SCP) in the SS7 network; they do not make an intermediate connection through STPs. In the F-link configuration, the signaling link connects directly to an interface card in the Cisco MGC host.
As with the A-link configuration, the F-link signaling configuration can be used with simplex and high-availability host configurations, and it supports V.35, T1, and E1 interfaces using signaling interface cards installed in the Cisco MGC host. Each interface supports a single DS0 signaling channel.
PRI backhaul configurations obtain call signaling data from D channels on ISDN links connected to the media gateway. In the Cisco VSC2700 product, the media gateway routes D-channel signaling to the VSC host over a T1/E1 connection. The VSC host takes action on the signaling information and sends routing instructions to the media gateway using the control signaling network.
The following sections describe the components that make up the Cisco MGC solution configurations:
The Cisco MGC software runs on general computing platforms running the Solaris operating system. The following host computers are manufactured by Sun Microsystems have been tested and certified to operate with the Cisco MGC software:
The following sections introduce the Cisco MGC host computers and the signaling network interface cards you can use in them.
The Sun Netra t 1120 is a telecommunications class server that was designed specifically for telecommunications applications. The Sun Netra t 1120 is NEBS and ETSI compliant and can support the following:
The Sun Netra t 1120 is DC-powered. The unit can be mounted in 19-inch, 23-inch, and 24-inch telco racks, and 600 mm telco racks. Figure 1-4 and Figure 1-5 show the Sun Netra t 1120 or Sun Netra t 1125. See Table 1-4 for system specifications.
| Feature | Description |
|---|---|
Processor | Up to 2 300 MHz UltraSPARC-II processors |
Main memory | Up to 2 GB (with 128 MB SIMMs) |
Operating system | Sun Solaris 2.5.1, 2.6 |
| Interfaces |
|
Network | Ethernet/Fast Ethernet, STP (10 BaseT and 100 BaseT) or MII for external transceiver |
I/O | 40 MB/sec UltraSCSI (SCSI-3 synchronous) |
Serial | Two EIA/TIA 232C or EIA/TIA 423 serial ports (DB25) |
Parallel | Centronics-compatible parallel port (DB25) |
PCI | Four full-size PCI with PCI specification version 2.1; three slots operating at 33 MHz, 32- or 64-bit data width; one slot operating at 33 or 66 MHz |
Alarm card | DB-15-pin connector; three dry contact outputs (minor, major, critical); external reset input |
| Environment |
|
DC power (Sun Netra t 1120) | -48/60 VDC nominal, 350W, dual input |
AC power (Sun Netra t 1125) | 110-240 VAC 47-63 Hz |
Operating | 5 to 40°C (41 to 104°F) 5 to 85% relative humidity, noncondensing, subject to a maximum absolute humidity of 0.024 kg water/kg of dry air |
Short-term (96 consecutive hours) operating | -5 to 55°C (23 to 131°F) (at a maximum height of 1800 m) 5 to 90% relative humidity, noncondensing |
Non-operating | -40 to 70°C (-4 to 158°F) 10 to 95% relative humidity, noncondensing, subject to a maximum absolute humidity of 0.024 kg water/kg of dry air |
Tape streamer | Error-free operation at 0 to 40°C (32 to 104°F) |
Temperature variation | 30°C/hr maximum |
Elevation | Operating: -300 to +3000 m nonoperating: -300 to +12000 m |
Acoustic noise | Less than 60 dBA at a distance of 600 mm and a height of 1500 mm, measured at 25°C |
Earthquake | NEBS requirements for Earthquake Zone 4 |
| Regulatory Compliance and Safety Specifications (meets or exceeds the following requirements) Note See the regulatory and compliance documentation that accompanies this product for complete regulatory compliance and safety information. | |
Safety | UL 1950 3rd Edition, CSA C22.2 No. 950, TUV EN 60950, CB Scheme with Nordic deviations EMKO-TSE (74-SEC) 203, ZH1/618, GR-1089-CORE |
RFI/EMI | FCC Class A, EN 55022 Class A, EN 61000-3-2, GR-1089-CORE |
Immunity | EN 50082-1, GR-1089-CORE |
Certification | NEBS Bellcore SR-3850 1st edition Level 3 (mission critical), UL, cUL, CEMark, TUV Buart MarkM__UWJ_M__U |
| Dimensions and Weights |
|
Height | 6.97 in. (17.70 cm) |
Width | 17.13 in. (43.50 cm) |
Depth | 19.53 in. (49.60 cm) |
Weight | 51.0 lb (23.18 kg) |
Enclosure | 19-, 23-, 24 in., 600 mm (requires mounting kit) |
The Sun Netra t 1125 is identical to the Sun Netra t 1120 except that the Sun Netra t 1125 is AC-powered.
Figure 1-4 shows the front view of the Sun Netra t 1120 and Sun Netra t 1125. Figure 1-5 shows the back view of the Sun Netra t 1120, which is similar the Sun Netra t 1125 but uses a different power connector. See Table 1-4 for system specifications.
The Sun E450 is a data processing server. Unlike the Sun Netra t 1120 and the Sun Netra t 1125, the Sun E450 is not NEBS and ETSI compliant. Special care should be taken to ensure that the operating environment meets the following minimum support specifications:
The unit is available only in an AC configuration. Because of its size, it can be mounted only in 4-post cabinets.
Figure 1-6 and Figure 1-7 show the Sun E450, and Table 1-5 lists the Sun E450 specifications.
| Feature | Description |
|---|---|
Processor | Up to 4 300-MHz UltraSPARC-II modules with on-board E-cache |
Main memory | Up to 4 GB RAM |
Operating system | Sun Solaris 2.5.1. 2.6 |
| Interfaces |
|
I/O | One, two, or three modular, N+1 redundant, hot-swappable, universal input (two supplies standard) 1120W maximum, 560W maximum each supply PCI I/O options: FDDI single attach, FDDI dual attach, ATM-155, ATM-622, high-speed serial, eight-line serial, UltraSCSI with 10/100 Mb/sec Ethernet, dual-channel single-ended UltraSCSI, dual-channel differential UltraSCSI, 100-MB/sec FCAL |
Serial | Two EIA-232D or EIA-423 serial ports, DB25 (requires Y-type splitter cable); one 50 to 384 Kbps synchronous, one 50 to 460.8 Kbaud asynchronous |
Parallel | 2-MB/sec Centronics compatible bidirectional EPP port; DB 25 |
PCI | Three slots for 32-bit 33-MHz 5V PCI cards |
| Environment |
|
Power supplies | One, two, or three modular, N+1 redundant, hot-swappable, universal input (1 supply standard) |
AC | Power 90-264 Vrms, 47-63 Hz |
AC Service requirement | 15A at 110V, 7.5A at 240V |
Maximum power consumption | 1664 W |
Heat output | 5680 BTU/hour maximum |
Operating temperature | 5° to 40°C (41° to 104°F) at 20 to 80% relative humidity, noncondensing |
Non-operating temperature | -20° to 60°C (-4° to 140°F) at 5 to 93% relative humidity, noncondensing |
| Regulatory Compliance and Safety Specifications (meets or exceeds the following specifications) Note See the regulatory and compliance documentation that accompanies this product for complete regulatory compliance and safety information. | |
Safety | UL 1950, CSA 950, TUV EN60950, IEC950 |
RFI/EMI | FCC Class B, DOC Class B, EN55022/CISPR22 Class B, VCCI Class II |
Immunity | EN50082/IEC-1000-2, IEC-1000-3, IEC-1000-4, IEC-1000-5 |
Harmonics | EN61000-3-2 |
| Dimensions and Weights |
|
Height | 22.87 in. (58.1 cm) |
Width | 17.64 in. (44.8 cm) |
Depth | 27.40 in. (69.6 cm) |
Weight | 205 lb. (94.0 kg) |
Rack mounting | Sun E450 can be mounted in a standard 19-in. EIA rack with minimum depth of 30 in. (675 mm) Note The Sun E450 requires a 4-post rack that will accommodate equipment slides. |
Table 1-6 lists the signaling interface cards that are available for installation in Cisco MGC hosts.
| Signaling Interface Cards | Supported Interface Types | Interfaces Per Card | Signaling Channels Per Interface |
|---|---|---|---|
Digi International, Inc. (formerly ITK International) E1/T1 card | T1 | 1 | 2 |
E1 | |||
PTI V.35 card | V.35 | 4 | 1 |
For Cisco VSC2700 solutions requiring channelized E1/T1 PRI terminations, a Digi ix1-primary interface card is used. The ix1 card provides a programmable Primary Rate Interface. With dip settings, the card can be configured to support both E1 (30B + D) and T1 (23B + D) interfaces.
The control signaling network is the IP network that links the Cisco MGC host with the media gateway. The link between solution components can be a single Ethernet hub, or you can use redundant LAN switches to eliminate a single point of failure. You can also use a WAN to link the Cisco MGC host to remote media gateways.
For simplex configurations, you can use the following topologies to create a control signaling network:
For high-availability configurations, you can use the following topologies:
For high-availability configurations, using dual hubs or switches eliminates the possibility of a single point of failure. The Cisco MGC hosts featured in this guide provide a single Ethernet network interface that you can use to connect the host to the control signaling network. The high-availability configuration requires the addition of an Ethernet interface card in one of the PCI slots in the Cisco MGC host. Installing two Ethernet interfaces enables an independent connection to each switch or hub.
The A/B Switch is used to switch signaling links from the active Cisco MGC host to the standby Cisco MGC host if a failure condition is encountered. The A/B Switch is manufactured by Dataprobe and is required for high-availability configurations. "Maintenance." Figure 1-8 and Figure 1-8 show the A/B Switch.
The Alarm Relay Unit (ARU) is a configuration option that provides contacts for critical, major, and minor alarms. The ARU Figure 1-10 and Figure 1-11 show the ARU.
The Serial Port Expander adds additional serial interfaces to a Sun host computer. The Serial Port Expander option consists of a Sun PCI asynchronous interface card and a cable breakout box.
Posted: Fri Dec 10 00:05:09 PST 1999
Copyright 1989-1999©Cisco Systems Inc.
