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Currently, telecom companies are advancing at unprecedented pace. User groups that
are rapidly developing, diversified business and operational environments require
telecom companies to offer services that are of higher and better quality. Thus,
these companies are facing all-round competitions from home and abroad. How to initiate
new operation style, lower operational cost, develop new businesses and open new
revenue streams are crucial challenges that telecom companies are confronting.
SPAS programmable Switch
can provide many kinds of access services, including No.7, No.1, V5, PRA, ASL, and
flexible conversion among them. It is an access service platform that is open, advanced,
flexible, efficient, and easily extendable. It has two interfaces: E1 and T1. The
system exhibits strong technical superiorities in the above-mentioned aspects. It
is an advanced programmable switch platform with whole owned intellectual property
and high performance-to-price ratio in the local market.
Introduction to the System Hardware Architecture
SPAS-2000 platform is composed of SPAS-2000 DTS and SPAS-2000 SAS. SPAS-2000 DTS
is a programmable Switch dealing with the access of signaling, while SPAS-2000 SAS
is the user access module, mainly dealing with the access of user interface such
as ASL user, DDN, and FXO/FXS.
1 Features
1)SPAS-2000 is a product developed with
industrial PC based on ISA and PCI bus. It adopts modular design to ensure the extensibility
and integration of the system. A single module can realize 2KX2K non-blocking exchange.
2)Versatile hardware interfaces. SPAS-DTS has SS7,
DT, VOC, and MFU; SPAS-SAS provides many kinds of user interface boards
3)Backup power system makes the system highly reliable
4)One 10/100 Base-T Ethernet interface on the MPU board
provides communications with administrator, CTI, and other SPAS modules.
5)Hierarchical control and clustering technology adopted
to increase the handling capacity and reliability of the system.
6)Standard rack structure, all functional boards can
be installed on racks.
2 Introduction of SPAS-2000 SAS (user access modules)
SAS provides the access of 4 E1 i.e. 120 channels. Signaling can be transmitted
via the E1 connection between the trunk and the DTU board of SPAS-2000 DTS through
the ABCD code/CAS. Following interfaces are supported,
> Analog user board (ASL): one board for eight user
channels
> DDN board, support the transmission rate of Nx64K
> FXO/FXS: eight channels on each board, with support
for polarity reversal detection.
> E/M user board: 8 channels on each board
3 Introduction of the SPAS-2000 DTS(Digital Trunk Access)
1) No.7 Signaling Board (SS7): one single module of
SPAS system can be installed with two SS7 boards, providing connections for 4 signaling
links. SS7 board has the following features:
> Realizing the data link layer function of No.7
signaling (MTP L2), which is normally accomplished by the SS7 signaling handling
chip and the CPU on the single board
> There are two signaling links on SS7 signaling
board. Designing of the board is based on the ISA/PCI bus. Via the mini switch net,
any two 64kb/s time slots among the one time group of PCM transmission system (2Mb/s)
may be selected as the duplex data channels of signaling transmission
> Four-way connection verification circuits are
also designed on SS7 board to meet the requirement of the TUP layer of CCITT No.7
2) Trunk Board(DTU): 7 DTU boards can be inserted into
one SPAS module; DTU board has the following features:
> There are 8 E1 on DTU board. They are highly integrated
for maximal flexibility: each E1 can be configured as PRA, R2MF, TUP, ISUP, ASL
and V5X as required
> Eight HDLC are designed to match 8 E1 on DT board
to provide flexible signaling configuration
> Interface board supports E1 and T1
3) Multi-functional Signal Tone Unit (MFU) : MFU can
be inserted into the general slot of DTU, or slot 14 or 15. When inserted into the
general slot, 256 channels can be handled, whereas when inserted into slot 14 or
15, 192 channels can be handled. It has the following functions:
> MFC forward reception/ MFC backward reception
> DTMF reception: multiple kinds of signal tones
transmission(up to 60 types including MFC forward/backward transmission), and special
signal tones (fax tone, busy tone, etc.) detection
> FSK reception & transmission
> Voice code U LAW/A LAW conversion: each board
can convert between U LAW and A LAW of 128 channels
> Flexible configuration, 4 DSP boards with 64 channels
each, can be configured independently
4) Voice Board:
> Provide 100M Ethernet interface
> Support 240-channel voice recording/playing
> Embedded Flash can store 30-minute voice recording
> Include 8-channel fax
> With DTMF detection
> Support IP (H.323) protocol
Features of SPAS-2000 System
1 Modular architecture: The design of SPAS programmable
Switch is based on open standards and modular architecture;
2 Multi-signaling access: The system supports the common
signaling access in the local market. The flexible routing configuration modes facilitates
different kinds of routings such as lowest cost routing and routing upon different
services requirements;
3 Versatile hardware resources: SPAS-2000 platform
provides versatile hardware interface resources, including resources such as voice,
fax, IP, conference, DTME/MFC reception/transmission, standard E1/T1 interfaces,
user interface (ASL, DDN, FXO/FXS). With the combinations of these resources, the
platform can be used for many different services;
4 Open interfaces: Standard external TSPI interface
is provided. Users can do value-added development with the utilization of standard
TAPI. They are also able to connect with third party IVR flow generator;
5 Large capacity: The configuration of a single module
can consist of 56 E1, 2K X 2K exchange network, which, can be scaled to 240 E1,
8K X 8K exchange network by cascading. This will adequately satisfy the needs of
applications relevant to signaling conversion, call center and unifying information;
6 Powerful network administration functions:
SPAS programmable Switch provides powerful network administration entirely based
on graphical user interface design, including:
> Data configuration: configurations of card resources,
office routing, No.7, V5, etc. and those online modifications; after new data is
configured, upload or download in the same condition will not affect the running
of other resources and no need to restart the system .
> Track, monitor, and maintain: tracking classified
signaling, monitoring the channel status, and maintaining the signaling links and
channel status.
> Signaling analysis: signaling explanation on the
information tracked and collected
> Flexible number editing: Adding or deleting prefix
of the callee number.Users can modify the caller number specified.
> Calling statistics. Call statistics accurately
reflect the call flow in the period.
> Detailed alarm message: intuitive alarm platform,
complete display, recording of all the alarm incidents during the running of the
switch.
> Strict administrator authentication: delegated
administrations and flexible authority settings ensure the safe running of the switch.
> All the functions configured will take effect
immediately without terminating the server or restarting the switch.
> Remote control: on-line modification of the IP
address of the switch, on-line version upgrade of the edition, flexible watch dog
startup, safe and stable running of the program.
7 Powerful processing capability: BHCA of the single
No.7 link is 44900 times/hr, and that of a double link is 73000 times/hr. The overall
processing capacity of the system is 130 000 times/hr;
8 Highly reliable: call loss is less than 1/105 in
callings exceeding ten millions times;
9 Successfully passed the test conducted by the Ministry of Information
Industry and has been awarded the access license;
10 High performance to price ratio: The highly integrated
design of SPAS-2000 lowers the construction costs and increases the profit margin
at the same time.
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