Juniper CTP2000 Hardware Guide
CTP2000 Series Circuit to Packet Platforms
Published
2020-08-31
Hardware Guide
Juniper Networks, In.
1133 Innovation Way
Sunnyvale, California 94089
USA
408-745-2000
www.juniper.net
Copyright © 2020 Juniper Networks, Inc. All rights reserved.
Juniper Networks, the Juniper Networks logo, Juniper, and Junos are registered trademarks of Juniper Networks, Inc.
and/or its affiliates in the United States and other countries. All other trademarks may be property of their respective
owners.
Juniper Networks assumes no responsibility for any inaccuracies in this document. Juniper Networks reserves the right
to change, modify, transfer, or otherwise revise this publication without notice.
CTP2000 Series Circuit to Packet Platforms Hardware Guide
Copyright © 2019 Juniper Networks, Inc. All rights reserved.
ii
Revision History
February 2017—Revision 2
January 2019—Revision 3
The information in this document is current as of the date on the title page.
END USER LICENSE AGREEMENT
The Juniper Networks product that is the subject of this technical documentation consists of (or is intended for use with)
Juniper Networks software. Use of such software is subject to the terms and conditions of the End User License Agreement
(“EULA”) posted at https://support.juniper.net/support/eula/. By downloading, installing or using such software, you
agree to the terms and conditions of that EULA.
Table of Contents
1
Overview
CTP2000 Series Platform Overview | 2
Introducing CTP Series Platforms | 2
CTP2000 Series Processor | 2
CTP2008 Platform | 3
CTP2024 Platform | 5
CTP2056 Platform | 7
CTP2000 Series Interface Modules | 11
CTP2000 Serial Interface Modules | 11
iii
CTP2000 Multiservice Interface Module | 12
CTP2000 T1/E1 Interface Module | 13
CTP2000 Compression Module | 13
CTP2000 4WE&M Interface Module | 14
Supervisory Signaling | 18
CTP2000 2W-FXS and 2W-FXO Interface Modules | 20
Required Cables and Pinouts | 22
Analog FXS/FXO Loop-Start Signaling | 22
Answer Supervision | 22
Disconnect Supervision | 22
Analog FXS/FXO Ground-Start Signaling | 23
Digital Signaling | 23
Digital FXS/FXO Loop-Start Signaling | 23
Digital FXS/FXO Ground-Start Signaling | 24
CTP2000 8P-IRIG Interface Module | 26
CTP2000 Clock Interface Modules | 27
External Reference Clock | 29
Installation Notes for Clock Interface Modules | 30
CTP2000 PMC Module | 30
Planning
2
System Specifications | 33
CTP2008 Platform Specifications and Certification | 33
CTP2024 Platform Specifications and Certification | 35
CTP2056 Platform Specifications and Certification | 38
Planning and Preparing the Site | 40
Before You Install a CTP Platform | 40
CTP2000 Environmental Requirements | 40
Equipment Rack Requirements | 42
CTP2000 Rack Requirements | 42
CTP2000 Mechanical Requirements | 42
iv
CTP2000 Space Requirements | 43
CTP2000 Rack Installation | 43
CTP Cabling Recommendations | 44
Cable and Pinout Specifications | 45
CTP2000 4WE&M Interface Connector Pinouts | 45
CTP2000 4WE&M RTM Connector A Pinouts | 45
CTP2000 4WE&M Connector B Pinouts | 46
CTP2000 FXS and FXO Interface Module Cables and Pinouts | 48
Required Cables | 48
RTM Pinout Locations | 48
FXS Connector Pinouts | 49
FXO Connector Pinouts | 50
T1/E1 Interface Module Pinouts | 51
CTP2000 Serial Interface Module Pinouts | 52
CTP2000 Series Console Cable Pinouts | 63
CTP Fast Ethernet and Power Cables | 68
Fast Ethernet Cables | 69
DC Power Cables | 69
Terminal Block and Circuit Breaker Specifications | 69
Safety
3
4
General Safety Guidelines and Warnings | 72
CTP Safety Guidelines and Warnings | 72
Module Installation Safety Guidelines and Warnings | 74
Safety Guidelines and Warnings for Installing CTP Modules | 74
Hardware Compliance | 76
Declaration of Conformity for CTP2000 Platforms | 76
Federal Communications Commission (FCC) Statement | 78
FCC Requirements for Consumer Products | 78
Food and Drug Administration, Center for Devices and Radiological Health | 79
Compliance with Canadian Regulations | 79
v
Industry Canada Notice | 79
Industry Canada Notice CS-03 | 80
Avis CS-03 d'Industrie Canada | 80
Canadian Department of Communications Explanatory Notes | 81
DOC Explanatory Notes: Equipment Attachment Limitations | 81
Notes explicatives du ministère des Communications: limites visant les accessoires | 81
Statements of Volatility for Juniper Network Devices | 82
Installation
Unpacking and Inspecting the CTP Platform | 87
Before You Unpack the CTP Platform | 87
Unpacking the CTP Device | 87
Inspecting Platform Components and Accessories | 88
If You Detect or Suspect Damage | 89
Contacting Juniper Networks | 89
Installing the Chassis | 90
Before You Install the CTP2000 Platform | 90
Installing the CTP2000 Platform in Freestanding Mode | 91
Special Guidelines for Installing CTP2056 Chassis in a Rack | 91
Installing the CTP2000 Platform in a Rack | 92
Installing Modules | 93
CTP2000 Modules Installation Overview | 93
Protecting CTP2000 Modules and Slots | 94
Required Tools and Safety Items for Installing CTP Modules | 95
Installing a CTP Interface Module, Processor Module, or Clock Module | 95
Removing a CTP Interface Module, Processor Module, or Clock Module | 96
Installing or Removing a CTP2000 Series CompactFlash Card | 98
Installing a PMC on CTP2000 Platforms | 99
Installing and Removing SFPs in a CTP Module | 102
Installing SFPs in a CTP2000 Module | 102
Removing SFPs in a CTP2000 Module | 104
Upgrading Components for Memory Upgrades | 106
vi
Upgrading CTP2000 Series Components for Memory Upgrades | 106
Cabling | 108
Cabling the CTP2000 Platform Overview | 108
Required Tools, Wires, and Cables for the CTP2000 Platform | 109
CTP2000 Management Ports | 110
Cabling a CTP2000 T1/E1 Interface Module | 111
Cabling the CTP Platform for DC Power | 111
Task 1: Turning Off All CTP Platform Power | 112
Task 2: Connecting the Grounding Cable to the CTP Platform (CTP2056 Platform Only) | 112
Task 3: Connecting the Power Cables to the CTP2000 Platform | 113
Powering On | 115
Before You Power On the CTP2000 Platform | 115
Powering On the CTP2000 Platform | 116
Powering Off the CTP Platform | 119
Configuration
5
6
7
Accessing the CTP2000 Platform | 121
Setting Up Management Access on the CTP2000 Platform | 121
CTP2000 Console Port Setup | 122
Using HyperTerminal with the CTP2000 Platform | 123
Connecting Directly to the CTP2000 Platform | 124
CTP2000 Platform SSH Setup | 125
Maintenance
Maintaining Components | 127
Required Tools for Maintaining the CTP Platform | 127
Storing CTP Modules and Other Components | 127
Cleaning the CTP Platform | 128
vii
Replacing an AC Power Supply | 129
Product Reclamation and Recycling | 131
Product Reclamation and Recycling Program | 131
Replacing Fan Trays | 133
Removing a CTP2000 Fan Tray | 133
Installing a CTP2000 Fan Tray | 133
Packing and Returning Hardware | 135
Return Procedure | 135
Returning CTP Products for Repair or Replacement | 136
Troubleshooting
Troubleshooting Power Failures | 138
CTP Platform Does Not Power On | 138
CTP Platform Shuts Down | 139
Contacting Customer Support | 140
Contacting Customer Support | 140
Locating CTP Component Serial Numbers | 141
Information You Might Need to Supply to JTAC | 141
1
PART
Overview
CTP2000 Series Platform Overview | 2
CTP2000 Series Interface Modules | 11
CHAPTER 1
CTP2000 Series Platform Overview
IN THIS CHAPTER
Introducing CTP Series Platforms | 2
CTP2000 Series Processor | 2
CTP2008 Platform | 3
CTP2024 Platform | 5
CTP2056 Platform | 7
2
Introducing CTP Series Platforms
Juniper Networks CTP Series Circuit to Packet platforms provide advanced technology and features
required to reliably transport legacy time-division multiplexing (TDM) and other circuit-based applications
across next-generation IP networks. CTP Series platforms create an IP packet flow from a serial data or
analog voice connection at one end and provide the necessary processing to re-create the serial bit stream
or analog signal from the received packet flow at the other end.
CTP Series platforms provide compact and lightweight chassis, high port density, and multiple Ethernet
interfaces. Each CTP Series platform runs the CTP operating system (CTPOS) and can be managed by the
Juniper Networks CTPView Network Management System. The CTPView Network Management System
is a secure, Web-based management tool for provisioning, managing, running diagnostics, monitoring, and
reporting on all CTP Series devices and circuits in the network.
CTP2000 Series Processor
Starting with CTPOS Release 6.6, Juniper Networks CTP2000 Series Circuit to Packet platforms support
the PP833 processors (see Figure 1 on page 3) in addition to the older PP310 and PP332 family of
processors.
The front panel of the PP833 processor comprises the following components (see Figure 1 on page 3):
PMC—Both PMC slots are available to support compatible fiber PMC modules. For more information
g0 09 077
PMC/XMC1 PMC/XMC2
2 USB 1 ETH1 ETH2S R U P RS232H
PMC/XMC1 PMC/XMC2
USB1
USB2 ETH1
ETH2
Console
USBOptional fiber PMC
Interface module, slot 0
Card extractor
Power supply screw Power supply extractor
g015387
•
about the PMC module, see “CTP2000 PMC Module” on page 30 and “Installing a PMC on CTP2000
Platforms” on page 99.
Ethernet connection—Provides the 1-Gbps Ethernet connection to the IP network by means of a local
•
Ethernet switch or router.
Console connection—Provides an asynchronous tty connection for locally configuring the CTP Series
•
device. Because of front panel space limitations, the PP833 processor provides an RS232 serial console
via a supplied USB-to-DB9 cable (p/n 720-071594), in which the DB-9 connector has the same pinout
as a standard RS-232 DTE port.
Figure 1: PP833 Processor (AC and DC Version, Front View)
3
CTP2008 Platform
The Juniper Networks CTP2008 Circuit to Packet platform is a 3-U high, full-rack wide chassis designed
for tabletop or shelf installation. It can also be installed in a rack with the supplied rack-mounting kit. The
CTP2008 platform has one removable interface module and one removable processor module, and is
available in both AC-powered and DC-powered versions. It has a removable fan tray, and airflow is
side-to-side. Figure 2 on page 3, Figure 3 on page 4, and Figure 4 on page 5 show the CTP2008 chassis
containing the PP332 processor (which requires an RTM card for Ethernet and console port accesses).
The new PP833 processor module does not require an RTM card. All PP833 module access is located on
the front panel with all CTP serial and T1/E1 ports. If you are upgrading from the old PP310 or PP332
processor to the PP833 processor, the RTM card may be left in the node. But, none of the interfaces
(Ethernet or serial ports) on the RTM panel are functional.
Figure 2: CTP2008 Chassis Containing the PP332 Processor (AC and DC Version, Front View)
The front panel comprises the following components (see Figure 2 on page 3):
ETH1 USBConsole
Power input and switch
COM2 COM3
PMC I/O 1
PMC I/O 2
Not used Not used
Not used ETH0
g015353
Interface module—Frame processing and forwarding engines.
•
Processor module—Two slots are available on this module for an optional fiber Gigabit Ethernet or Fast
•
Ethernet PMC module. The primary SC connector is on the left side. For more information about the
PMC module, see “CTP2000 PMC Module” on page 30 and “Installing a PMC on CTP2000 Platforms”
on page 99.
Power supply extractor—Push the button to eject the power supply module.
•
The rear panel (RTM) comprises the following components (see Figure 3 on page 4 and
Figure 4 on page 5):
Clock module—Provides clock distribution between modules when the backplane is in use by voice
•
applications.
Power supply—Use a standard IEC power cord for the AC version. Use a 22-AWG fork terminal connector
•
for the DC version. There is no power redundancy for the AC version and the DC version.
There are no power switches on CTP2000 Series DC models, so a readily accessible disconnect device
must be provided as part of the electrical installation of the unit. We recommend the 22-AWG wire for
DC power terminals.
4
Ethernet connection—Provides the 1-Gbps Ethernet connection to the IP network by means of a local
•
Ethernet switch or router.
Console connection—Provides an asynchronous tty connection for locally configuring the CTP Series
•
device. On the PP310 and PP332 processors, you can connect a console directly to the COM2 port
(which is an RJ-45 type connector) found on the RTM panel.
Figure 3: CTP2008 Platform Containing the PP332 Processor (AC Version, Rear View)
Figure 4: CTP2008 Platform Containing the PP332 Processor (DC Version, Rear View)
g015354
ETH1 USBConsolePower A input connector
COM2 COM3
PMC I/O 1PMC I/O 2
Not used Not used
Not used
ETH0
ESD
-48VDC
RTN
Fuse
USB
Optional fiber PMC
Power supply screw Power supply extractor
Interface module, slot 0
Fan tray with fan alarm
Removable air filter
Interface module, slot 1
Interface module, slot 2
g015388
RELATED DOCUMENTATION
CTP2024 Platform | 5
CTP2056 Platform | 7
5
CTP2024 Platform
The Juniper Networks CTP2024 Circuit to Packet platform can have up to three removable interface
modules and one removable processor module, and is available in both AC-powered and DC-powered
versions. It has a removable fan tray, and airflow is side-to-side. Figure 5 on page 5, Figure 6 on page 6,
and Figure 7 on page 7 show the CTP2024 chassis containing the PP332 processor (which requires an
RTM card for Ethernet and console port accesses). The new PP833 processor module does not require an
RTM card. All PP833 module access is located on the front panel with all CTP serial and T1/E1 ports. If
you are upgrading from the old PP310 or PP332 processor to the PP833 processor, the RTM card may
be left in the node. But, none of the interfaces (Ethernet or serial ports) on the RTM panel are functional.
Figure 5: CTP2024 Chassis Containing the PP332 Processor (AC and DC Version, Front View)
The front panel comprises the following components (see Figure 5 on page 5):
Interface modules—Frame processing and forwarding engines.
•
Processor module—Two slots are available on this module for an optional fiber Gigabit Ethernet or Fast
•
Ethernet PMC module. The primary SC connector is on the left side. For more information about the
PMC module, see “CTP2000 PMC Module” on page 30 and “Installing a PMC on CTP2000 Platforms”
on page 99.
Power supply extractor—Push the button to eject the power supply module.
•
Fan tray and air filter.
•
The rear panel (RTM) comprises the following components (see Figure 6 on page 6 and
Figure 7 on page 7):
Clock module—Provides clock distribution between modules when the backplane is in use by voice
•
applications.
Power supply—Use a standard IEC power cord for the AC version. Use a 22-AWG fork terminal connector
•
for the DC version. Power redundancy is supported for the AC version and the DC version. A single IEC
power cord is used to connect the redundant AC power supply modules, which keeps the chassis turned
on in the event of failure of one of the power supplies.
6
There are no power switches on CTP2000 Series DC models, so a readily accessible disconnect device
must be provided as part of the electrical installation of the unit. We recommend the 22-AWG wire for
DC power terminals.
Ethernet connection—Provides the 1-Gbps Ethernet connection to the IP network by means of a local
•
Ethernet switch or router.
Console connection—Provides an asynchronous tty connection for locally configuring the CTP Series
•
device. On the PP310 and PP332 processors, you can connect a console directly to the COM2 port
(which is an RJ-45 type connector) found on the RTM panel.
Figure 6: CTP2024 Platform Containing the PP332 Processor (AC Version, Rear View)
Figure 7: CTP2024 Platform Containing the PP332 Processor (DC Version, Rear View)
Power A and power B input connectors
Ground terminal
Fuse
ETH1 USBConsole
COM2 COM3PMC I/O 2
Not used
Not used
Interface module, slot 1
Interface module, slot 2
g015358
Not used
ETH0
PMC I/O 1
RELATED DOCUMENTATION
7
CTP2008 Platform | 3
CTP2056 Platform | 7
CTP2056 Platform
The Juniper Networks CTP2056 Circuit to Packet platform can have up to seven removable interface
modules and one removable processor module, and is available in both AC-powered and DC-powered
versions. It has a removable fan tray, and airflow is side-to-side. Figure 8 on page 8, Figure 9 on page 9,
and Figure 10 on page 10 show the CTP2056 chassis containing the PP332 processor (which requires an
RTM card for Ethernet and console port accesses). The new PP833 processor module does not require an
RTM card. All PP833 module access is located on the front panel with all CTP serial and T1/E1 ports. If
you are upgrading from the old PP310 or PP332 processor to the PP833 processor, the RTM card may
be left in the node. But, none of the interfaces (Ethernet or serial ports) on the RTM panel are functional.
Figure 8: CTP2056 Chassis Containing the PP332 Processor (AC and DC Version, Front View)
USB
Optional fiber PMC
Power supply screw Power supply extractor
Interface module, slot 0
Interface module, slot 1
Interface module, slot 2
Interface module, slot 3
Interface module, slot 4
Interface module, slot 5
Interface module, slot 6
Fan tray with fan alarm
Removable air filter
g015389
8
The front panel comprises the following components (see Figure 8 on page 8):
Interface modules—Frame processing and forwarding engines.
•
Processor module—Two slots are available on this module for an optional fiber Gigabit Ethernet or Fast
•
Ethernet PMC module. The primary SC connector is on the left side. For more information about the
PMC module, see “CTP2000 PMC Module” on page 30 and “Installing a PMC on CTP2000 Platforms”
on page 99.
Power supply extractor—Push the button to eject the power supply module.
•
Fan tray and air filter.
•
The rear panel (RTM) comprises the following components (see Figure 9 on page 9 and
Figure 10 on page 10):
Clock module—Provides clock distribution between modules when the backplane is in use by voice
•
applications.
Power supply—Use a standard IEC power cord for the AC version. Use a 22-AWG fork terminal connector
•
for the DC version. Power redundancy is supported for the AC version and the DC version. A single IEC
power cord is sufficient to connect the redundant AC power supply modules, which keeps the chassis
turned on in the event of failure of one of the power supplies.
There are no power switches on CTP2000 Series DC models, so a readily accessible disconnect device
must be provided as part of the electrical installation of the unit. We recommend the 22-AWG wire for
DC power terminals.
Ethernet connection—Provides the 1-Gbps Ethernet connection to the IP network by means of a local
Interface module, slot 1
Interface module, slot 2
•
Ethernet switch or router.
Console connection—Provides an asynchronous tty connection for locally configuring the CTP Series
•
device. On the PP310 and PP332 processors, you can connect a console directly to the COM2 port
(which is an RJ-45 type connector) found on the RTM panel.
Figure 9: CTP2056 Platform Containing the PP332 Processor (AC Version, Rear View)
9
Figure 10: CTP2056 Platform Containing the PP332 Processor (DC Version, Rear View)
10
RELATED DOCUMENTATION
CTP2008 Platform | 3
CTP2024 Platform | 5
CHAPTER 2
CTP2000 Series Interface Modules
IN THIS CHAPTER
CTP2000 Serial Interface Modules | 11
CTP2000 Multiservice Interface Module | 12
CTP2000 T1/E1 Interface Module | 13
CTP2000 Compression Module | 13
CTP2000 4WE&M Interface Module | 14
CTP2000 2W-FXS and 2W-FXO Interface Modules | 20
CTP2000 8P-IRIG Interface Module | 26
11
CTP2000 Clock Interface Modules | 27
CTP2000 PMC Module | 30
CTP2000 Serial Interface Modules
The Juniper Networks CTP2008, CTP2024, and CTP2056 Circuit to Packet platforms have up to one,
three, and seven serial interface modules, respectively. The interface modules are interchangeable between
the platforms.
The following interface modules have two 100-pin connectors similar to the connectors provided on the
CTP1004 and CTP1012 platforms. Each connector provides four ports by means of the quad cable. (See
“Cabling the CTP2000 Platform Overview” on page 108.) The lowest-numbered ports start at the top right.
CTP2000 IM-8P—Provides the standard software-configurable data interfaces, including EIA530,
•
EIA530A, RS-232, and V.35; 8 port.
CTP2000 IM-8P-T1—Provides the standard software-configurable data interfaces, plus a configurable
•
T1/E1 interface; 8 port.
CTP2000 IM-8P-V—Provides the standard software-configurable data interfaces, plus a configurable
•
4WTO interface; 8 port.
Figure 11: Sample Serial Interface Module
g015452
CTP2000 IM 8PIRIG
CTP2000 IM 8P MS
RELATED DOCUMENTATION
Cabling the CTP2000 Platform Overview | 108
CTP2000 Serial Interface Module Pinouts | 52
CTP2000 T1/E1 Interface Module | 13
CTP2000 Compression Module | 13
CTP2000 4WE&M Interface Module | 14
CTP2000 2W-FXS and 2W-FXO Interface Modules | 20
CTP2000 8P-IRIG Interface Module | 26
12
CTP2000 Multiservice Interface Module
The Juniper Networks CTP2000 Circuit to Packet platform optionally includes an 8-port Serial Multiservice
Interface module (CTP2000-IM-8p-MS) as shown in Figure 12 on page 12.
Figure 12: CTP2000 Serial Multiservice Interface Module
The cable used with the Serial Multiservice Interface module is CTP-CBL-4Q.
The module can operate in the following modes:
Audio—Provides single and dual channel audio support for varying quality audio from 8-bit, 8-KHz quality
•
to 8-bit up to 16-bit, 48-KHz quality (CD quality).
4WTO—Provides single and dual channel audio support for 8-bit, 8-KHz quality with squelch support
•
for radio backhaul. In 4WTO mode, the Multiservice interface module is interoperable with 4WTO
daughter cards.
IRIG—Enables an interrange instrumentation group time code (IRIG-B) signal to be transported through
•
an IP network.
TDC—Provides combined time-correlated support for IRIG/NRZ data for telemetry applications.
•
The interface module is supported on CTP bundles; You use the bundles to configure the modes of
0 1 32
7654
CTP2000 IM-T1/E1
g015363
operation.
RELATED DOCUMENTATION
Serial Multiservice Interface Module Overview
CTP2000 T1/E1 Interface Module
The CTP2000 Series T1/E1 interface module has RJ-48 ports numbered 0–7 left to right. It provides a
configurable eight-port E1 (2.048 MHz) or T1 (1.544 MHz) interface with AMI or B8ZS encoding. (See
Figure 13 on page 13.) You can use the eight port T1/E1 interface module to interconnect digital voice
applications with CESoPSN bundles.
13
Figure 13: CTP2000 IM-8P-T1/E1 Interface Module
RELATED DOCUMENTATION
CTP2000 Serial Interface Modules | 11
CTP2000 Compression Module | 13
CTP2000 4WE&M Interface Module | 14
CTP2000 2W-FXS and 2W-FXO Interface Modules | 20
CTP2000 8P-IRIG Interface Module | 26
T1/E1 Interface Module Pinouts | 51
Cabling a CTP2000 T1/E1 Interface Module | 111
CESoPSN Bundle Overview
CTP2000 Compression Module
The CTP2000 Series Compression Module enables serial data and voice bundles to be compressed and
passed through a CTP2000 platform. It provides twice the digital signal processor (DSP) density of the
original compression module. (See Figure 14 on page 14.)
Voice bundles originating from the CTP2000 IM-8P-T1/E1, analog CTP2000 IM-4WE&M,
Not used Not used Not used
Fail
Reset
g015364
CTP2000-IM-2W-FXS, and CTP2000-IM-2W-FXO modules can use the CTP2000 Compression 2 High
Density Interface Module to compress voice bundles. Voice bundles ranging from 1–24 channels on a T1
module, 1–30 channels on an E1 module, and 1–8 channels on a 4WE&M module can be bundled and
connected through the Compression 2 High Density Module to compress the voice bundle and build the
IP packet.
NOTE: CTP2000 Compression Module can no longer be purchased.
Figure 14: Compression Module
14
The Compression Module supports these compression algorithms:
G.711 (64k)
•
G.729AB (8k)
•
This module supports Mu-Law and A-Law companding, echo cancellation, silence suppression, fax/modem
detection, and tone relay. You can configure the compression options when you configure the voice bundle.
RELATED DOCUMENTATION
CTP2000 T1/E1 Interface Module | 13
CTP2000 4WE&M Interface Module | 14
CTP2000 2W-FXS and 2W-FXO Interface Modules | 20
CTP2000 4WE&M Interface Module
The CTP2000 Series 4WE&M interface module has eight 4-wire E&M ports. It is used with voice
compression (VCOMP) bundles in CTP2000 models and can be used only with a CTP2000 compression
module. You can use the 4WE&M interface module to interconnect analog 4WE&M voice applications
with CESoPSN bundles.
NOTE: You can use the eight port T1/E1 interface module to interconnect digital voice
Port signaling LEDs
Not used
RJ-21 25-pair connectors
4WEM RTM
g015366
applications with CESoPSN bundles.
Four-wire audio interfaces with E and M signaling interfaces (4WE&M) are commonly used as trunks
between a central office (CO) and a private branch exchange (PBX). E and M is a type of supervisory line
signaling that uses separate leads, called the "E" (ear) lead and "M" (mouth) lead and are traditionally used
in the telecommunications industry. In 4WE&M signaling, two wires are used to receive and two wires are
used to transmit, incorporating simplex control and differential payload in each channel. Type I, II, and V
signaling is supported.
The 4WE&M interface module consists of a front card and a rear transition module (RTM). Port interfaces
are located on connectors A and B of the RTM. (See Figure 15 on page 15 and Figure 16 on page 15.) The
RJ-45 connectors are not used.
Figure 15: CTP2000 4WE&M Module
15
Figure 16: 4WE&M RTM
CAUTION: Power to the RTM is supplied from the interface module. Using an RTM
other than those matched to the interface module may result in damage to both the
interface module and the RTM. For example, never install a clock module RTM directly
behind a 4WE&M interface module.
Voice ports can be used only by voice compression bundles (VCOMP) and cannot be used for CTP, SAToP,
or CESoPSN bundles. There is no software configuration of 4WE&M ports. Signaling type is configured
by means of jumpers (see Figure 18 on page 16 and Table 1 on page 16). One or more 4WE&M ports can
be mapped to a VCOMP bundle. The bundle configuration specifies the remote destination, the local port
or ports transported by the bundle, voice compression options, as well as other configuration options.
Figure 17: Jumper Locations on the RTM
g015368
E&M
type
config
jumpers
Unused
dual
RJ-45
Pin 1
Type I
Type II
Type V
g015367
16
Figure 18: Jumper Positions for Signaling Types
NOTE: Jumper JP17 must be in Position 1-2 (see Table 1 on page 16) if any ports are set for
Type II signaling. This jumper ties all signal battery (SB) signals to battery voltage (–48V).
Jumper JP26 is used to connect all signal grounds (SG) to the chassis ground. When jumper JP26 is in
Position 1-2, the signal ground is connected to the chassis ground. In Position 2-3, it is isolated from the
chassis ground.
Table 1: Jumper Positions for Configuring Port Signaling Type
Signaling Type VSignaling Type IISignaling Type IJumper
Position 1-2Position 2-3Position 1-2JP1Port 0
Table 1: Jumper Positions for Configuring Port Signaling Type (continued)
17
Signaling Type VSignaling Type IISignaling Type IJumper
Position 1-2Position 2-3Position 2-3JP9
Position 1-2Position 2-3Position 1-2JP2Port 1
Position 1-2Position 2-3Position 2-3JP10
Position 1-2Position 2-3Position 1-2JP3Port 2
Position 1-2Position 2-3Position 2-3JP11
Position 1-2Position 2-3Position 1-2JP4Port 3
Position 1-2Position 2-3Position 2-3JP12
Position 1-2Position 2-3Position 1-2JP5Port 4
Position 1-2Position 2-3Position 2-3JP13
Position 1-2Position 2-3Position 1-2JP6Port 5
Position 1-2Position 2-3Position 2-3JP14
Position 1-2Position 2-3Position 1-2JP7Port 6
Position 1-2Position 2-3Position 2-3JP15
Position 1-2Position 2-3Position 1-2JP8Port 7
Position 1-2Position 2-3Position 2-3JP16
The rear transition board uses two RJ-21 25-pair Telco connectors labeled A and B to interface the audio
and control connections for eight E&M channels.
NOTE: Because of space limitations, a 180º RJ-21 connector is required. The CTP 4WE&M RTM
supports clips to secure the RJ-21 cable connections to the RTM.
The R1/T1 pair and the R/T pair are the audio inputs and outputs of each port, respectively. For example,
the audio input pair for port 0 is R1 and T1 on pins 2 and 27 of connector A. The audio output pair for
port 0 is R and T on pins 1 and 26.
See Table 2 on page 18 for signal definitions. See “CTP2000 4WE&M Interface Connector Pinouts” on
page 45 for the connector A and B pinouts.
Table 2: Signal Definitions
Signal DefinitionSignal Name
Audio transmit pair, 600 OhmPort x T, R
Audio receive pair, 600 OhmPort x T1, R1
E lead–outputPort x E
M lead–inputPort x M
Input for signal ground for signaling type IIPort x SG
18
Port x SB
GND
Output signal battery (–48V) for signaling type II. Note that JP17 must be in
position 1-2.
Signal ground. E and M leads are referenced to this ground for signaling types
I and V. Use JP26 to connect this ground to chassis ground.
Supervisory Signaling
Supervisory signaling is the means by which a telephone user requests a service or initiates a call. The
signaling unit (CTP platform) interacts with the trunk unit (PBX) by means of either two or four leads,
depending on the signaling type. (See Figure 19 on page 19.) The signaling unit controls the E lead, whereas
the trunk side controls the M lead. The two signaling states are on-hook and off-hook. During inactivity
both units are on-hook. See Table 3 on page 20 for a summary of signaling types supported by the CTP2000
4WE&M module.
NOTE: 4WE&M and 4WTO audio paths are always up independent of the signaling state.
Figure 19: Analog 4WE&M Signaling Types
19
Type I uses two leads—the E and M leads—for signaling. During inactivity, the E lead is open and the M-lead
is connected to ground. The CTP device connects the E lead to a grounding point to signal off-hook, and
the PBX connects the M lead to the battery (–48 V) to signal off-hook. Note that two signaling units cannot
be connected back-to-back. With type I signaling, the signaling and trunk units must be connected by
means of a common ground. Because the two sides are not isolated, they are susceptible to noise in the
audio channels.
Type II uses four leads—E, SG, M, and SB—for signaling. During inactivity, both the E and M leads are open.
To signal off-hook, the PBX connects the M lead to SB and the CTP device connects the E lead to SG.
Note that two signaling units can be connected back-to-back if the appropriate signaling leads are swapped.
With Type II signaling, the signaling unit and the trunk do not share a common ground.
Type V uses two leads, the E and M leads, for signaling. During inactivity, both the E and M leads are open.
The CTP device signals off-hook by connecting the E lead to ground. The trunk circuit signals off-hook by
connecting the M lead to ground. As with type I, with type V signaling, the two units share a common
ground. Type V signaling allows for signaling units to be connected back-to-back.
Table 3: Supported Signaling Types for the CTP2000 4WE&M Module
CTP (E Lead)PBX (M Lead)Signaling LeadsSignaling Type
Off-hookOn-hookOff-hookOn-hook
GroundOpenBatteryGroundE, MI
SGOpenSBOpenE, M, SG, SBII
GroundOpenGroundOpenE, MV
20
RELATED DOCUMENTATION
CTP2000 4WE&M Interface Connector Pinouts | 45
CTP2000 Serial Interface Modules | 11
CTP2000 T1/E1 Interface Module | 13
CTP2000 Compression Module | 13
CTP2000 2W-FXS and 2W-FXO Interface Modules | 20
CTP2000 8P-IRIG Interface Module | 26
CESoPSN Bundle Overview
CTP2000 2W-FXS and 2W-FXO Interface Modules
The CTP2000 2W-FXS and CTP2000 2W-FXO interface modules provide analog support for voice
applications. The 2W-FXS module has 24 two-wire FXS ports and the 2W-FXO interface module has 12
two-wire FXS ports. Both are paired with an RTM.
FXS interfaces point to the subscriber and supply battery and ring voltage. Some FXS devices also provide
•
dial tone, but CTP FXS interfaces do not. FXS interfaces detect when the attached FXO interface goes
off-hook and on-hook. An FXS interface is a two-wire interface; the leads are called the tip (T) and the
ring (R).
FXO interfaces point to the central office. An analog phone is an example of an FXO device. The FXO
•
interface must detect ring voltage (the analog phone rings) and provide on- and off-hook indication to
the FXS interface. An FXO interface is a two-wire interface; the leads are called the tip (T) and the ring
RST
2016
128
40
2319151173
CTP2000 IM 2WFXS
Port signaling LEDs
g015381
Not used
RJ-21 25-pair connectors
2WFXS RTM
g016231
Port signaling LEDs
g015380
Not used
RJ-21 25-pair connectors
2WFXO RTM
g016232
(R).
You can interconnect the following voice applications with CESoPSN bundles:
Analog 4WE&M voice applications using the 4WE&M interface module
•
Digital voice applications using the T1/E1 interface module
•
Both interface modules consist of a front module and an RTM. See Figure 20 on page 21 and
Figure 21 on page 21 for the CTP2000 2W-FXS interface module.
Figure 20: Front Panel of CTP2000 2W-FXS Interface Module
21
Figure 21: Rear Panel of CTP2000 2W-FXS RTM
See Figure 22 on page 21 and Figure 23 on page 21 for the CTP2000 2W-FXO interface module.
Figure 22: Front Panel of CTP2000 2W-FXO Interface Module
Figure 23: Rear Panel of CTP2000 2W-FXO RTM
Both modules use connector A on the RTM. For both modules, connector B and the RJ-45 connectors are
not used. See “CTP2000 FXS and FXO Interface Module Cables and Pinouts” on page 48 for connector
pinout information.
You set the signaling by using the software on both modules. You cannot reconfigure the jumper parameters.
Required Cables and Pinouts
The CTP2000 2W-FXS and 2W-FXO interface modules require the use of double-shielded cables (copper
braid plus aluminum mylar foil) to ensure EMI compliance. See “CTP2000 FXS and FXO Interface Module
Cables and Pinouts” on page 48 for particulars about cable pinouts.
Analog FXS/FXO Loop-Start Signaling
There are two basic signaling protocols for FXS/FXO interfaces: loop-start and ground-start. Residential
telephones use loop-start. Ground-start is typically used between a CO and a PBX to prevent “glare.” Glare
occurs when a call is established by the FXS device and the FXO device tries to make a call before the ring
has been detected.
When a call is initiated from the CO (or FXS) side, the FXS interface puts an AC ring voltage on the R lead
(typically 70-90 Vrms). This ring voltage generates the ringing that you hear on an analog phone. When
the FXO device answers the call (someone picks up the handset), the switch is closed between the T and
R leads to complete a loop between the battery and ground in the FXS device. The FXS device detects
the current, which flows from the battery (–48 V) through the R leads and back through the T leads to
ground and stops the ring voltage.
22
When a call is initiated by the CPE (or FXO) device, the device goes off-hook, closing the connection
between the T and R leads. The FXS device senses the current flow in the loop. Either the attached FXS
device, or an upstream FXS device, provides dial tone to the FXO device after it is ready to accept the
digits for the call destination. Providing dial tone is a form of start-dial supervision.
On the FXO device, when the device is on-hook, there is an open lead between the T and R leads. When
the device is off-hook, the T and R leads are shorted with a typical load of ~300 Ohms. With loop-start,
the T and R leads on the FXO interface can be switched without adversely affecting the signaling.
Glare occurs when a call is established by the FXS device and the FXO tries to make a call before the ring
has been detected. Because it takes time for the FXO device (or person about to place a call) to detect
ringing, it is possible for the FXS and FXO devices to both seize the line without knowledge that the other
end has done so. Ground-start circuits were established the minimize the possibility of glare. See “Analog
FXS/FXO Ground-Start Signaling” on page 23.
Answer Supervision
Answer supervision is a signal used by the phone companies to determine when to start billing the originator
of the call. Without answer supervision, you could get billed for the time the phone was ringing, even if
the call was never picked up. When the FXS device has detected that the FXO device has gone off-hook,
it reverses the polarity between the T and R leads for the duration of the call.
Disconnect Supervision
Disconnect supervision is a signal sent by the FXS device to the FXO device to indicate that the call has
ended. The disconnect supervision signal can be either a battery reversal, battery denial (more than 350
ms), or a tone.
Note that loop-start circuits are not sensitive to tip/ring reversal. For example, the tip on the FXO device
may be connected to either the tip or ring on the FXS.
Analog FXS/FXO Ground-Start Signaling
Ground-start signaling is used to minimize the potential for glare. Unlike loop-start circuits, ground-start
circuits operate correctly only when the FXO tip is connected to the FXS tip and the FXO ring is connected
to the FXS ring. Also, unlike loop-start circuits, the FXS and FXO grounds must be at the same potential.
When on-hook, the FXO ring is not connected to either the tip or ground. Likewise, when idle, the FXS
tip is not connected to ground. When a call is initiated from the CO (FXS side), the FXS grounds its tip and
applies an AC ring voltage to the R lead. The FXO device senses the grounded tip and AC ring voltage, and
then goes off-hook by closing the loop (connecting R to T). The FXO has 100 ms to respond to the grounded
tip/ring voltage. This time constraint is used to minimize glare. Once the FXO has closed the loop, the call
proceeds as in the loop-start case.
When a call is initiated by the customer (FXO) side, the FXO starts by grounding the R lead. The FXS side
responds by grounding its T lead. After the FXO has detected the grounded T lead, it closes the loop by
removing the R lead from ground and closing the loop. With ground-start circuits, a far-end disconnect
(FXS side) is indicated by the FXS disconnecting the tip from ground. The FXO senses the tip disconnect
and goes on-hook by opening the loop.
23
Digital Signaling
Channel banks are often used to multiplex and demultiplex FXS or FXO interfaces onto T1 or E1 digital
circuits. In the process, the analog signal is converted into pulse code modulation (PCM) and carried by
one of the channels in the time-division multiplexing (TDM) circuit. For the interface to function properly,
it must be able to signal the remote end of the T1/E1 connection as well as respond to signals from the
remote end. Signaling is carried over the TDM circuit using either channel-associated signaling (CAS) or
common-channel signaling (CCS). Generally, four signaling bits (A, B, C, and D) may be used; however, two
signaling bits are most common (A and B).
For CTP analog voice products to work with digital devices, A and B bits are generated and transported
across the network.
Digital FXS/FXO Loop-Start Signaling
For loop-start signaling of FXS and FXO interfaces, the A bit is used to indicate the state of the current
loop, whereas the B bit is used for ringing. In the idle state (no ringing, FXO on-hook), A=0 and B=1. A=1
when the FXO is off-hook. Ringing is signaled by the B bit toggling between 0 and 1. Typically the toggling
is 2 seconds off and 4 seconds on. For digital loop-state, the signaling is bidirectional.
Because hook indication is detected by the analog FXS interface, this device is responsible for generating
the A bit. Likewise, because the analog FXS interface generates the ring voltage, this device must respond
Loading...