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18 Section 61182007L1-5, Issue 1 61182007L1-5A
Table 5. Total Access 3000 LTU Specifications
Loop Interface
Modulation Type ...............................2B1Q
Mode ..................................................Full Duplex, Echo Canceling
Number of Pairs.................................Two
Bit Rate ..............................................1168 kbps per pair
Baud Rate ..........................................584K baud per pair
Service Range ....................................2.7 km over 0.4 mm cable;* 4.7 km over 0.5 mm cable*
Loop Loss ..........................................27 dB maximum @ 150 kHz
Bridged Taps .....................................2 Taps, 500 meters maximum each
Performance.......................................Compliant with ETSI TS 135 101
HDSL Tx Signal Level ......................13.5 dBm
Input Impedance ................................135 Ω
Return Loss........................................20 dB (40 kHz to 200 kHz)
Network Interface
4-wire E1 ...........................................2.048 Mbps CCITT G.703 and G.704 compatible
E1 Output Level ................................0 dB
Impedance..........................................75 or 120 Ω
E1 Core Frame...................................Method 0, Method 1 (see Section 5)
E1 Line Code .....................................AMI, HDB3
E1 Format ..........................................CCS, CAS, Unframed
E1 Error Checking .............................CRC4
Power
Total Power .......................................-48 Vdc @ 10 W typical
E1 LTU Power Dissipation ...............<7 W maximum
E1 LTU -48 Vdc Current Drain.........< .3 A maximum
Sealing Current ..................................current limited at 10 mA
Span Power ........................................-120 Vdc (internally generated) current limited at 60 mA (CE compliant)
Clock
Clock Sources ....................................Internal, E1 Derived
Internal Clock Accuracy ....................+ 25 ppm (Stratum 4)
Tests
Diagnostics ........................................Self-Test, Local Loopback (LTU), Remote Loopback (NTU)
Physical
Dimensions ........................................6 in. (152.4 mm) high x 5/8 in. (15.9 mm) wide x 10 in. (254 mm) deep
Weight ...............................................Less than 1 lb.
Environment
Temperature.......................................Operating (Standard): -40°C to +70°C; Storage: -40°C to +85°C
Safety .................................................In conformance with EN41003 and EN60950, IEC 950
Overvoltage Protection ......................In conformance with CCITT K.20
EMC ..................................................In conformance with EN55022 and EN50082
Part Number
Total Access LTU..............................1182007L1
8. PRODUCT SPECIFICATIONS
Product specifications are detailed in Table 4.