1 - Voiceband Modem Standards
||Tabular summary of modem characteristics, from legacy modems
|2 - DSX Applications in Small Central Offices
||Covers the Digital Signal
Cross-Connect, or DSX. While everything in this application note applies
to central offices of any size, it focuses on small central offices and
similar applications. For larger central offices, the only additions would
be in designing inter-bay cabling and resolving planning issues. Companion
application notes cover related topics including CSU/DSU applications and
3 - CSU/DSU Applications in DS1 Service
||Discusses a number of the issues
associated with installing a Channel Service Unit (CSU) or Data Service
Unit (DSU) on a customers premises. The DTE typically used
with CSUs are PBXs, channel banks, and DS1 network access multiplexers.
The DTE used with DSUs are subrate and Fractional T1 multiplexers, and
local area network (LAN) routers and bridges.
4 - Testing DS1 Services
||Summarizes DS1 service testing
procedures and requirements at the Digital Signal Cross-Connect, or DSX-1, and
DS1 line repeaters
(for repeatered T1-carrier).
5 - Switched 56
||Describes the technical aspects of
Switched 56 service and its deployment in a local exchange area. Switched
56 is an end-to-end digital, 56 kb/s, full-duplex, synchronous, circuit
switched service, which is available either directly from a Local Exchange
Carrier (LEC) or through an Interexchange Carrier (IXC). Transmission is
entirely over digital links.
6 - ISDN Basic Rate Interface
||Focuses on the access, or subscriber
loop, portion of the Integrated Services Digital Network (ISDN) Basic Rate
Interface (BRI). While this discussion is mostly concerned with the
Physical Layer, or Layer 1, of the Open Systems Interconnection (OSI)
reference model as it applies to the ISDN, mention is made of the Data-Link Layer (Layer 2) and Network Layer
(Layer 3). This note also
discusses architectures and applications as they apply to what
is now called the Narrowband ISDN (NISDN).
|7 - The DeciBel
||Covers the logarithmic unit of signal
ratio most commonly used in telephony, the deciBel (dB). Another related
application note covers the application of the dB in using Transmission
8 - Transmission Level Point
||Covers the concept of the Transmission
Level Point, or TLP. Another related application note covers the deciBel,
or dB, which is fundamental to using Transmission Level Points.
9 - Subrate Digital Loops
||Describes the technical aspects of
subscriber loops associated with dedicated digital services, which operate
at standard speeds from 2.4 to 64 kb/s. This application note focuses on
the higher speeds of 56 and 64 kb/s. These loops are called Subrate Digital Loops (SRDL) and require
two metallic twisted cable pairs, one for each direction of transmission. The SRDL is the access portion of an end-to-end
synchronous digital service variously called Digital Data Service,
Dataphone“ Digital Service or Dedicated
Digital Service, all of which use the acronym DDS. The DDS channels can be
operated in the point-to-point and point-to-multipoint modes, except that
the 64 kb/s user rate is point-to-point only.
|10 - Signaling System No. 7 - Tutorial
||Heavily illustrated introduction to SS7. Covers
architecture, signaling links, and ISUP and SCCP/TCAP messaging applicable
to the North American SS7 network.
|11 - SS7 Testing with the Sunset T10
||Describes step-by-step procedures for using the Sunrise
Telecom Sunset T10 DS1 tester equipped with SS7 software options.
This document assumes a previous background in SS7; see Signaling System
No. 7 - Tutorial above.
12 - BETRS Radio Engineering Guide
||A handbook developed specifically for 150 to 900 MHz trunked
and point-to-point wireless local loop systems used in rural areas.
Covers all aspects of propagation, antenna selection, site survey,
licensing, installation and testing.