This chapter begins with a general description of Scorpio 1000 (S1000) and Scorpio 1400(S1400), S1000 is a high-density universal rack mounted system. S1400 has two different models: S1400 and S1400RL (equipped with Ethernet port). Both of them have the same specifications but only different interfaces of customer. S1400 has DS1/E1, Data (V.35, V.36, RS-530 and X.21) interfaces and S1400RL has Ethernet interface only. Then, the chapter describes how to use TAINET Scorpio 1400 (S1400) in several applications and show the possible interface configurations of S1000/S1400 System.
DSL (Digital Subscriber Loop) technologies increase the bandwidth capacity of existing ubiquitous telephone line (the local copper loops). G.SHDSL is designed for business applications, where high speed is required in both transmission directions. It provides symmetrical data rates of 192Kbps to 2.304Mbps in 2-wire with a transmission distance up to 20Kft using SHDSL technology. The data rates will be increased to 4.624Mbps in 4-wire link. The speeds obtainable using DSL technologies are tied to the distance between the customer premise and the Telco central office. Performance varies with loop characteristics, such as line conditions, loop distance, wire gauge, noise, and the number and locations of bridged taps and gauge changes. The G.SHDSL bit rate can be configured (or rate adapted) to adapt to the line conditions.
The Scorpio 1000 (S1000) provides full coverage of the Last Mile with a variety of technologies, rates, interfaces and media. The system supports standard technologies such as G.SHDSL. Each card in the S1000 is in a point-to-point configuration opposite to a remote unit with no connection to the adjacent cards. This allows totally independent operation among the ports and cards on the S1000. Three types of technologies will be provided in S1000: 2-wire G.SHDSL modems, 4-wire G.SHDSL modems, and fiber optic modems.
S1000 is a high-density universal rack mounted system. The chassis has 14 slots that accommodate up to 14 modems or 28 modems if dual-port cards are used. Using modular interface cards, S1000 can support SHDSL or fiber in the same chassis under a single management system.
Its hot-swappable feature allows any card or cable to replaced or removed during equipment operation, without causing interference to data transmission to / from other cards in the chassis.
Modular data interfaces allow modem connectivity via a wide range of DTE interfaces. These interfaces include T1, E1, DATA (V.35, V.36 / RS449, X.21, RS-530), or Ethernet (S1400 RL).
The S1400 System can be configured as a central unit, STU-C (SHDSL Transceiver Unit - Central), at central office, and a remote unit, STU-R (SHDSL Transceiver Unit - Remote), at customer premises. SHDSL System employs full duplex transmission with one pair or two pairs.
Loop between STU-C and STU-R.
The services are extended through the ubiquitous copper wires or leased lines with the technologies of G.SHDSL or fiber. Various interface extensions are supported: E1, T1, DATA (V.35, V.36 / RS449, X.21, RS-530), and Ethernet (S1400RL).
Figure 1-1 and Figure 1-2 show two typical applications. Figure 1-3 depicts the possible interface configurations. The S1400 automatically activate start-up when the power of the STU-C and STU-R are enabled or after temporarily disconnecting the STU-C or STU-R.
Figure 1 1 Application of Back-to-Back
Figure 1 2 Application of S1000/S1400 System
Figure 1 3 Possible Interface Configuration of S1000/S1400 System
Note that Scorpio 1400 (S1400) can be configured as a desktop standalone STU-C or STU-R via craft port, whereas S1400 should be an STU-R when connected with S1000. When a S1400 equipped with Ethernet port, it could not carry any other DTE interface (T1/E1 or DATA interface). The System will fill the unused timeslot with a fixed eight-bit byte “11111111” on DS1/E1 signal.
To let the user understand the TAINET Scorpio 1400, this chapter begins with its main features. Then, the chapter continues to present the SHDSL interface, the network side interface, timing and synchronization, OAM (Operation, Administration and Maintenance) and technical specifications. The last part of this chapter is devoted to the applications of TAINET Scorpio 1400 family in different networks, which include cellular network, campus network and E1 network.
Listed below are the main features of the Scorpio 1400:
Support loop interface G.SHDSL and fiber (fiber version)
S1400 supports DTE interface: T1, E1, DATA (V.35, X.21, RS-530, V.36 / RS449) and Ethernet.
Carrying symmetrical 2048 Kbps payload for up to 2.4 miles / 3.9 Km over 26-AWG single pair copper wire
The Activation Sequence and Preactivation Sequence comply with section 6.2 and 6.3 of ITU-T G.991.2.
Both DS1 and E1 network side for STU-C and both DS1 and E1 customer side for STU-R. The DS1 or E1 interface is selectable by configuration.
With 1 pair, both DS1 and E1 network side for STU-C and V.35 customer side for STU-R. The data rate shall be nx64 Kbit/s (n = 1 to 24 for DS1, n = 1 to 31 for E1). V.35 network side for STU-C and V.35 customer side for STU-R. The data rate is nx64 Kbit/s (n = 1 to 36). Ethernet network side for STU-C and Ethernet customer side for STU-R. The data rate is multiple, including nx64 Kbit/s (n = 1 to 36).
With 2 pairs, both DS1 and E1 network side for STU-C and V.35 customer side for STU-R. The data rate shall be nx64 Kbit/s (n = 2 to 24 for DS1, n = 2 to 31 for E1). V.35 network side for STU-C and V.35 customer side for STU-R. The data rate is nx64 Kbit/s (n = 2 to 72). Ethernet network side for STU-C and Ethernet customer side for STU-R. The data rate is multiple, including nx64 Kbit/s (n = 2 to 72).
System start-up procedure test, there are completed within 60 seconds (From start of initial Preactivation to entering data mode and send Data defined in ITU-T G.991.2), and the maximum duration of the start-up procedure was limited within 120 seconds.
Support Timing and Synchronization: Local (internal) timing, Line timing (loop received clock), DTE timing
For test and diagnostic purpose the S1000 / S1400 system provides various loopback paths including ITU-T V.54 in-band activated and deactivated loopback code words for end-to-end loopback function
S1400 support the functions of stuffing, scrambling, keep-alive signal and out-of-service test to make the output signal of both directions meeting the application requirements and facilitate efficient section of problem.
Management by SNMP based UNMS or CID
Remote control / monitoring via Telnet and Ethernet
Remote in-band control / monitoring CPE via G.SHDSL EOC
Remote software upgrade via TFTP