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Maxim > App Notes > T/E Carrier and Packetized
Keywords: difference, T1, E1, channel, frame, superframe, extended, ESF, SF, D4, CRC-4, CAS, multiframe, CCS, RBS,
robbed bit, AIS, RAI, DMA
Dec 20, 2001
APPLICATION NOTE 590
Maxim® Telecommunications Frequently Asked Questions
Abstract: This FAQ discusses answers to general communication questions as well as Maxim device-specific questions.
This set of FAQs is designed to address some of the more common questions that may arise when using Maxim
telecommunication devices in new or existing designs. The questions are divided into different categories based on
specific information areas. Because some devices like the DS2155 have a combination of features, it is possible that
questions will span multiple categories.
Revision: June 25, 2009
Section 1. General Telecommunication Questions
1.
In T1, what is the difference between superframe (SF)/D4 and extended superframe (ESF)?
2.
What is the difference between T1 and E1?
3.
What is the difference between T1 and J1?
4.
What is SLC-96 and how does it relate to T1?
5.
How are frames, channel time slots, and bits numbered in T1 and E1?
6.
What are the differences between robbed-bit signaling (RBS), channel-associated signaling (CAS), and common-
channel signaling (CCS)?
7.
What are the red, blue, and yellow alarms in a T1 system?
8.
What are the alarm indication signal (AIS), remote alarm indication (RAI), and distant multiframe alarm (DMA) in
an E1 system?
9.
What is the difference between AMI, B8ZS, and HDB3?
10.
What are the names of the regulatory bodies that govern the requirements for network interface line protection?
11.
What is the difference between jitter and wander?
12.
What standards bodies govern telecommunications equipment compliance?
13.
When the boundary scan is not used, what will be the pin conditions for the JTAG test access pins?
14.
For a universal T1/E1 interface on the customer side, do T1/E1 service providers expect customer equipment to
provide a connection between the Tx and Rx pairs through the transformer center taps? Or, can the T1/E1 service
provider ignore this connection and leave it out of the design?
15.
What is the difference between channelized and unchannelized T1?
16.
Can I modify the codes of Maxim telecommunication drivers?
Section 2. General Device Operation Questions
1.
What are the standard register settings for a Maxim telecommunication device?
2.
What software is available for use with Maxim telecommunication devices?
3.
Can you provide an example design using various processors?
4.
Can you provide a reference design for the network interface?
5.
What is the meaning of the markings on Maxim devices?
6.
What is the difference between the device identification register (IDR) value and the device revision markings on
Maxim devices?
7.
What do the suffixes after Maxim telecommunication device names indicate?
8.
What kind of operating system is needed for Maxim telecommunication drivers?
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Inhaltsverzeichnis

Seite 1 - Page 1 of 22

Maxim > App Notes > T/E Carrier and Packetized Keywords: difference, T1, E1, channel, frame, superframe, extended, ESF, SF, D4, CRC-4, CAS, mu

Seite 2 - Page 2 of 22

Q7. What are some common problems and solutions when using the DS2155's internal HDLCs?A7. The DS2155 SCT has the ability to transmit and receiv

Seite 3 - Page 3 of 22

The DS21455 is a monolithic version of the DS21Q55, and is meant to be a drop-in replacement that is package, pin, and software compatible. The DS214

Seite 4 - Page 4 of 22

Q5. When the cable is unplugged for the network interface, why does the receive carrier loss (RCL) bit in the status register or the pin of the LIU o

Seite 5 - Page 5 of 22

Q9. Is it possible to use a sine-wave oscillator instead of a square-wave oscillator to supply different frequencies at the CLAD for the DS325x?A9. Ye

Seite 6 - Page 6 of 22

Q4. Why do the DS21372/DS2172 receive synchronizers sometimes lock to patterns other than the transmitted pattern in repetitive-pattern mode? A4. When

Seite 7 - Page 7 of 22

Q3. How is the absolute address calculated in the DS31256 HDLC controller?A3. The absolute address, also known as the real address or machine address

Seite 8 - Page 8 of 22

Q4. When designing a board with a Maxim telecommunication device, is there any restriction on PCB trace length from the device to the transformer?A4.

Seite 9 - Page 9 of 22

TXD[3:0] Transmit DataRXD[3:0] Receive DataTX_EN Transmit EnableRX_DV Receive Data ValidTX_ERR Transmit ErrorRX_ERR Receive ErrorCOL Collision DetectC

Seite 10 - Page 10 of 22

transmitted between two TDMoIP edge devices. Sometimes, a bundle can be called a pseudowire. Q4. I am getting bit errors with the DS34T108 in E1 inte

Seite 11 - 4. Line Interface Questions

In Maxim TDMoP devices, for an ARP request, all the fields are filled in except the target hardware address. When a system receives an ARP request, i

Seite 12 - Page 12 of 22

Section 3. Framer/Single-Chip Transceiver Questions 1. How are the DS21x5y, DS215y, or other telecommunication devices initialized? 2. Do Maxim t

Seite 13 - 5. BERT Questions

Q9. What is the difference between TIE and MTIE?A9. TIE, short for time interval error, is defined as the phase difference between a measured clock e

Seite 14 - 6. HDLC Questions

Figure 6. Typical MTIE graph with an MTIE mask. Q10. How can the user send OAM packets using the DS34T108?A10. OAM (operations, administration, and

Seite 15 - 7. Design Kit Questions

1. First 4MB, 0x1000000 — 0x13FFFFF is for jitter buffer 2. Next 1MB, 0x1400000 — 0x14FFFFF is for transmit buffer 3. Next 0.5MB, 0x1500000 — 0x157

Seite 16 - DS34T108?

Section 7. Design Kit Questions 1. How can I get the most updated definition files for the T1E1DK? 2. What software is available for Maxim telecommu

Seite 17 - Page 17 of 22

Q4. What is SLC-96 and how does it relate to T1?A4. SLC-96 (pronounced "slick 96") is used in conjunction with T1 as a digital-loop carrier

Seite 18 - Page 18 of 22

Q9. What is the difference between AMI, B8ZS, and HDB3?A9. AMI, B8ZS, and HDB3 are different types of line coding used in T1 and E1 communications sy

Seite 19 - Page 19 of 22

● American National Standards Institute - ANSI (www.ansi.org) ● European Telecommunications Standards Institute - ETSI (www.etsi.org) ● In

Seite 20 - Page 20 of 22

2. General Device Operation QuestionsQ1. What are the standard register settings for a Maxim telecommunication device?A1. Because there are many diffe

Seite 21 - Page 21 of 22

For all Maxim T1/E1 devices with an 8-bit data bus, the device identification register (IDR) is eight bits in length. The upper four bits are used to

Seite 22 - Additional legal notices:

single-port device contains a JTAG test access-port controller, and because the BSDL language lacks the ability to define multiple test access-port co

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