DS26303LN-120 datasheet(7/97 Pages) MAXIM

Part #	DS26303LN-120

Description	3.3V, E1/T1/J1, Short-Haul, Octal Line Interface Unit

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DS26303: 3.3V, T1/E1/J1, Short-Haul, Octal Line Interface Unit

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2 TELECOM SPECIFICATIONS COMPLIANCE

The DS26303 LIU meets all the relevant latest telecommunications specifications. The following table provides the

T1 specifications and relevant sections that are applicable to the DS26303.

Table 2-1. T1-Related Telecommunications Specifications

ANSI T1.102–Digital Hierarchy Electrical Interface

AMI Coding

B8ZS Substitution Definition

DS1 Electrical Interface. Line rate ±32ppm; Pulse Amplitude between 2.4V to 3.6 V peak; Power level between

12.6dBm to 17.9dBm. The T1 pulse mask is provided that we comply. DSX-1 for cross connects the return loss is

greater than 26dB. The DSX-1 cable is restricted up to 655 feet.

This specification also provides cable characteristics of DSX-Cross Connect cable—22 AVG cable of 1000 feet.

ANSI T1.231–Digital Hierarchy–Layer 1 in Service Performance Monitoring

BPV Error Definition, Excessive Zero Definition, LOS description, AIS definition

ANSI T1.403–Network and Customer Installation Interface–DS1 Electrical Interface

Description of the Measurement of the T1 Characteristics—100

W, pulse shape and template according to T1.102;

power level 12.4dBm to 19.7dBm when all ones are transmitted.

LBO for the Customer Interface (CI) is specified as 0dB, 7.5dB, and 15dB. Line rate is ±32ppm.

Pulse Amplitude is 2.4V to 3.6 V.

AIS generation as unframed all ones is defined.

The total cable attenuation is defined as 22dB. The DS26303 functions up to 36dB cable loss.

Note that the pulse mask defined by T1.403 and T1.102 are different—specifically at Times 0.61, -0.27, -34,

and 0.77. The DS26303 is compliant to both templates.

Pub 62411

This specification has tighter jitter tolerance and transfer characteristics than other specifications. The jitter transfer

characteristics are tighter than G.736 and jitter tolerance is tighter the G.823.

Similar Part No. - DS26303LN-120

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