Ameritec 30-0056 User Manual

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Page 1

Model 30-0056

AM8e E&M Adapter

(for the Model AM8e PCM/VF Call Analyzer)

Instruction Manual

Page 2

Model 30-0056

AM8e E&M Adapter

(Used with Model AM8e PCM/VF Call Analyzer)

Instruction Manual

October 18, 2000

Technical Data Subject to

Change without Notice

760 Arrow Grand Circle

Covina, CA 91722 USA

TEL 626.915.5441 FAX 626.915.7181

www.ameritec.com

For extra copies of this manual, order Part No. 18-0044

Page 3

Record of Revisions

00 August, 1992 Preliminary Issue. 01 October, 1992 Original Release. A May, 1993 Minot formatting changes. B April, 1994 Revision. New cover. Minor adjustments and spelling corrections. B1 June, 1995 Updated logos. Minor revisions. B2 June, 1997 Updated logos, formatting corrections. C October 18, 2000 Updated electronic copy, reformatted.

This manual was produced on a Power Macintosh using MS Word 6.0 and Adobe Illustrator

6.0.1.

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Model 300056 AM8e E&M Adapter (18-0044) Table of Contents

Table of Contents

1. INTRODUCTION.......................................................................................................1

1.1 Ameritec AM8e PCM/VF Call Analyzer .....................................................................1

1.2 AM8e Model 300056 E&M Adapter ..........................................................................2

1.3 AM8e Protocol Table Development Guide and Disk.....................................................2

1.4 Overview of E&M Test Configuration ........................................................................3

2. OPERATION OF THE E&M ADAPTER .........................................................................4

2.1 Front Panel Controls and Indicators..........................................................................4

2.1.1 PWR ON/OFF (Power ON/OFF Switch)...............................................................5

2.1.2 MODE (Mode Selector Switch) ..........................................................................5

2.1.3 MODE Indicators (Mode-Selected Indicators) .......................................................5

2.1.4 TYPE (E&M Type-Select Switch) .......................................................................5

2.1.5 TYPE Indicators (E&M Type Indicators) ..............................................................5

2.1.6 CONNECTION (Connection-Type Switch) ...........................................................6

2.1.7 CONNECTION Indicators (Connection-Type Indicators).........................................6

2.1.8 E1/M1, and E2/M2 Indicators (Active Status of E&M Signals) ..................................6

2.2 Connection to the Call Analyzer...............................................................................6

2.2.1 TO AM8e (AM8e Interface Connection)...............................................................6

2.3 Connections to Test Leads .....................................................................................7

2.3.1 SB/SG Connection .........................................................................................8

2.3.2 Tx/Rx for E1/M1.............................................................................................8

2.3.3 Tx/Rx for E2/M2.............................................................................................9

2.3.4 A1/B1 VF Connector .......................................................................................9

2.3.5 A2/B2 VF Connector .......................................................................................9

2.3.6 CO Ground Terminal.......................................................................................9

2.4 Setting the Operating Conditions ...........................................................................10

2.5 Remote Control of E&M Adapter............................................................................12

2.5.1 Remote Setup (ADP Command)......................................................................12

2.5.2 Remote Status (RADP Command) ...................................................................13

2.6 Call Analyzer Display and Bit Indicators ..................................................................13

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Table of Contents (18-0044) Model 300056 AM8e E&M Adapter

3. E&M SIGNALING DESCRIPTION ..............................................................................14

3.1 Connection Types ..............................................................................................15

3.1.1 2-wire E&M .................................................................................................16

3.1.2 4-wire E&M .................................................................................................16

3.1.3 4-wire E&M

................................................................................................16

3.1.4 Phantom E&M .............................................................................................16

3.2 E&M Trunk Types...............................................................................................18

3.2.1 E&M TYPE I ................................................................................................ 18

3.2.2 E&M TYPE II ...............................................................................................18

3.2.3 E&M TYPE III ..............................................................................................19

3.2.4 E&M TYPE IV.............................................................................................. 20

3.2.5 E&M TYPE V...............................................................................................20

APPENDIX A..............................................................................................................22

A.1 Analog R2 Monitoring in AM8e..............................................................................22

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Model 300056 AM8e E&M Adapter (18-0044) Table of Contents

List of Figures

Figure 1. 2- and 4-Wire E&M Connections .........................................................................3

Figure 2. 4-Wire Phantom E&M Connection .......................................................................4

Figure 3. Model 300056 AM8e E&M Adapter Front Panel......................................................4

Figure 4. Cables for AM8e E&M Adapter Front Panel Connector ............................................8

Figure 5. AM8e E&M Adapter Front Panel Connections......................................................10

Figure 6. Signaling Relationships ...................................................................................14

Figure 7. E&M Connection Diagrams ..............................................................................17

Figure 8. E&M Trunk Type Battery and Ground Connections (Type I and II)............................19

Figure 9. E&M Trunk Type Battery and Ground Connections (Type III, IV, and V) ....................21

Figure 10. Analog R2 Monitoring....................................................................................22

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Table of Contents (18-0044) Model 300056 AM8e E&M Adapter

List of Tables

Table 1. E&M Lead Signaling Conventions.......................................................................19

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Model 300056 AM8e E&M Adapter (18-0044) Instruction Manual

1. INTRODUCTION

This manual is intended for use with the Ameritec Model 300056 AM8e E&M Adapter (P/N 300056). This manual should be used in conjunction with the AM8e PCM/VF Call Analyzer Instruction Manual (P/N 180035), and the AM8e Protocol Table Development Guide (P/N 180040).

This manual is divided into 4 major sections, as listed in the Table of Contents. This first introductory section provides an overview of the AM8e VF Call Analyzer, AM8e E&M Signaling Adapter, and Protocol Table Development Guide; all of which are of fundamental importance to the instructions in this manual.

The second section describes the Model 300056 AM8e E&M Adapter, its front panel, and connections.

The third section is an overview of the characteristics of the various E&M connections and signaling types.

1.1 Ameritec AM8e PCM/VF Call Analyzer

The Ameritec AM8e PCM/VF Call Analyzer is a test set that is designed to emulate, monitor, and analyze signaling activity at the PCM interface point on an established connection.

Note: For brevity, the AM8e PCM/VF Call Analyzer will be referred to as the "Call

Analyzer" in the remainder of the text.

The Call Analyzer can emulate, or monitor and identify, activities at the near end (Tx) or far end (Rx) of either of two 2.048 Mbps PCM spans. This unit is described in the "Model AM8e PCM/VF Call Analyzer Instruction Manual" (P/N 180035).

Tests can be performed on any of 30 voice channels on the spans, and the Call Analyzer may operate with any selection of one of eight signaling protocols.

Up to eight protocols may be loaded into the Call Analyzer, either from the factory or by a user with an MS/DOS Compatible PC. The user may develop custom protocols to conform to local standards, as described in the "AM8e Protocol Table Development Guide".

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Instruction Manual (18-0044) Model 300056 AM8e E&M Adapter

Although the Call Analyzer can be used to test an analog loop circuit, it is not specifically designed for direct connection to analog lines using E&M Signaling conventions; therefore, Ameritec has developed the Model 300056 E&M Adapter.

1.2 AM8e Model 300056 E&M Adapter

The Model 300056 AM8e E&M Adapter is physically designed to replace the front cover of the Call Analyzer. The illustration on the cover of this manual shows both units as they would be set up for use.

Note: For brevity, the Model 300056 AM8e E&M Signaling Adapter will be referred

to as the "E&M Adapter".

The E&M Adapter is electrically connected to the Call Analyzer via a ribbon cable from a "TO AM8e" connector on its front panel to the LINE/TIMS connector on the rear panel of the Call Analyzer. All power and PCM2 input and output connections between the E&M Adapter and the Call Analyzer are via this connector.

The interfaces between the E&M signaling and VF circuits are via bantam jacks on the front panel of the E&M Adapter.

Functionally, the E&M Adapter is an Analog to Digital/Digital to Analog signal converter, which converts an E&M Signal from its line or equipment interface at a Central Office, to 2.048Mbps PCM Rx and Tx Signals, which are processed by the Call Analyzer. This allows the Call Analyzer to Emulate or Monitor either the near-end (Tx) or far-end (Rx) signaling on an E&M interface. The user must select PCM2 as PCM input.

1.3 AM8e Protocol Table Development Guide and Disk

The AM8e Protocol Table Development Guide (P/N 180040) is a user's guide to developing custom signaling protocols for the AM8e on an MS/DOS-compatible Personal Computer. Also included with the Guide is a Development Disk, which must be used together with third-party software as described in the Guide. Custom protocols are required for E&M monitoring and emulation.

In many cases, Ameritec has developed protocols which may be supplied to the user on a disk (or provided with the Call Analyzer). For example, "E&M_ADAPT" (9220040-PP) will enable the Call Analyzer to be used with the E&M Adapter.

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Model 300056 AM8e E&M Adapter (18-0044) Instruction Manual

Other protocols are listed in an Addendum to the Guide (P/N 180126). For more information, contact your local Ameritec Sales or Instruments Group representative.

1.4 Overview of E&M Test Configuration

Figure 1 shows the interfaces between terminal signaling equipment and a Central Office Switch trunk interface using 2-Wire E&M, 4-Wire E&M, or 4-Wire

E&M

connections. Figure 2 shows 4-Wire phantom E&M. The figures illustrate the positions of the E&M Signaling Adapter to emulate or monitor the terminal or switch. Both commonly-used circuit identifications "(T), (R), (T1), (R1), (E), (M)" and E&M Adapter signal labeling on the front panel "A1, B1, A2, B2, E1, M1" are shown in these illustrations.

BANTAM PLUG

sleeve

ring

tip

BANTAM PLUG

CABLE 48-0047, 6 FT.

CABLE 48-0048, 6 FT.

NOTE: Cables manufactured before 5/7/92 are Green (Ring - r) and RED (Tip - t) and will not have this color-code label

CABLE 48-0062, 6 FT.

Figure 1. 2- and 4-Wire E&M Connections

BANTAM PLUG

310 PLUG

RED (Ring)

GREEN (Tip)

BLACK (Sleeve)

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Instruction Manual (18-0044) Model 300056 AM8e E&M Adapter

Switch or E&M Call Analyzer Terminal or E&M Call Analyze

4W PHANTOM E&M OVERVIEW

EQUIPMENT mode

(T)

(M) M1

(R)

(Trunk Interface)

(T1)

(E) E1

(R1)

NOTE: 4 Wire Phantom connection is Trunk-type V only.

internal

Figure 2. 4-Wire Phantom E&M Connection

2. OPERATION OF THE E&M ADAPTER

2.1 Front Panel Controls and Indicators

Figure 3 shows the front panel of the E&M Adapter. The figure identifies the sub-section number descriptions which follow.

LINE mode

A2B2(T1)

(M)

(R1)

(T)

(R)

A2 B2A1 B1

E&M Call Analyzer

(E)

Monitoring connections

Model 300056

III

(2.1.8)

E1M1M1E1E2M2M2

SB SG A2 B2Tx Rx A1 B1

(2.3.1) (2.3.2) (2.3.3) (2.3.4) (2.3.5)

Tx Rx

CONNECTION

(2.1.6)

(2.1.7)

2W E&M

4W E&M

PHANTOM

E&M

PWR

TYPE

(2.1.1)

OFF

(2.1.5)

(2.1.4)

AM8e E & M Adapter

MODE

GROUND

(2.3.6)

TO AM8e

(2.1.3)

(2.1.2)

EMULATE LINE

MONITOR

EMULATE EQUIPMENT

(2.2.1)

Figure 3. Model 300056 AM8e E&M Adapter Front Panel

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Model 300056 AM8e E&M Adapter (18-0044) Instruction Manual

2.1.1 PWR ON/OFF (Power ON/OFF Switch)

This switch allows the user to turn the power on and off.

Note: Power (+16V) is provided by the Call Analyzer, which must also be turned

ON. The cable between the Call Analyzer and the AM8e E&M Signaling Adapter must also have been connected (refer to ¶2.2.1).

2.1.2 MODE (Mode Selector Switch)

This switch allows the user to emulate either a switch/trunk interface (equipment) or a signaling circuit (line) location, or to monitor the connection between locations.

The user may change the defined mode by pressing the mode switch to step to the next mode until the desired mode is reached. Possible Modes indicated on the panel are EMULATE LINE, MONITOR, and EMULATE EQUIPMENT.

2.1.3 MODE Indicators (Mode-Selected Indicators)

These indicators display the selected mode. As the user changes modes, the indicators change. The illuminated LED indicates the current mode of operation.

2.1.4 TYPE (E&M Type-Select Switch)

This switch allows the user to select the E&M type that is active. Each press of the switch selects, in rotation, the 5 common E&M types. For further description of each of the E&M types, refer to Section 3.

2.1.5 TYPE Indicators (E&M Type Indicators)

These LED's indicate which of the five common E&M types (I, II, III, IV, or V) has been selected.

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Instruction Manual (18-0044) Model 300056 AM8e E&M Adapter

2.1.6 CONNECTION (Connection-Type Switch)

This switch allows the user to select between E&M Connection Types. Each press of the switch selects, in rotation, the four common line connection types. For further description of the E&M connections, refer to Section 3. The types selected are:

2 Wire E&M See ¶3.1.1 4 Wire E&M See ¶3.1.2 4 Wire E&M 4 Wire Phantom E&M See ¶3.1.4

See ¶3.1.3

2.1.7 CONNECTION Indicators (Connection-Type Indicators)

These LED's indicate to the user the connection type that has been selected.

2.1.8 E1/M1, and E2/M2 Indicators (Active Status of E&M Signals)

These LED's display the status of the E&M signaling leads on the Tx and Rx jacks below them. When lighted, they indicate that the signal is present.

Note: When EMULATE EQUIPMENT is selected, the functions of the jacks and

indicators are reversed. This is signified within the rectangular marking surrounding (MODE:) "EMULATE EQUIPMENT", "M1 E1", and "M2 E2" on the front panel.

2.2 Connection to the Call Analyzer

2.2.1 TO AM8e (AM8e Interface Connection)

This is a DB-25 male connector, shown in Figure 3, where the 25-pin female connector of Cable 48015600 (supplied with the unit) is connected.

The other end of this cable has a 24-pin ribbon connector which connects to the LINE/TIMS connector on the rear panel of the Call Analyzer.

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Model 300056 AM8e E&M Adapter (18-0044) Instruction Manual

The signals provided from the Call Analyzer are as shown below:

SIGNAL PIN

LID-R 9 LID-T 10 LID-R1 11 LID-T1 12 CO GROUND 15 CO GROUND 16 CO GROUND 21 CO GROUND 22 +16 volt power 23 +16 volt power 24

CAUTION: Power should be turned OFF on the AM8e before making this

connection.

CAUTION: When using the LINE/TIMS jack as a connection point from the Call

Analyzer to the CO for LOOP or PCM signals (when not using the E&M Adapter); BE SURE THAT PINS 23 and 24 are NOT connected to CO

ground.

(These connections were not provided in early Call Analyzers, which show pins 9-11 as unused, and pins 23 and 24 as extra CO GROUNDS).

2.3 Connections to Test Leads

Connections for the E&M signaling, ground, battery, and VF interfaces may be made with any of the three types of cables which have a bantam connection on one end and a bantam plug, type 310 plug, or clip leads on the other. Figure 4 shows these cables. An additional single conductor is required to connect the CO GROUND.

Figure 4 is a detailed illustration of the jacks on the E&M Signaling Adapter. The figure further shows the E&M, VF, SG, and SB leads as if cables with clip leads were connected to the jacks.

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Instruction Manual (18-0044) Model 300056 AM8e E&M Adapter

Signaling leads are identified as they would appear on the clip leads when the appropriate MODE, TYPE, and CONNECTION are selected. Further information on the jacks is provided in the subsections which follow.

BANTAM PLUG

NOTE: Cables manufactured before 5/7/92 are

sleeve

ring

tip

BANTAM PLUG

Green (Ring - r) and RED (Tip - t) and will not have this color-code label

Figure 4. Cables for AM8e E&M Adapter Front Panel Connector

2.3.1 SB/SG Connection

This is a bantam jack for connection to the line Signal Battery (SB) and Signal Ground (SG). SB is on the tip conductor; SG is on the ring conductor. CO Ground is on the sleeve conductor. This connection is used only for E&M trunk types II, III, and IV.

2.3.2 Tx/Rx for E1/M1

This is a bantam jack for connection to the E1 and M1 leads. The status of these signaling leads is indicated by the E1 and M1 indicators directly above the connection. For MODE MONITORING and EMULATE LINE, E1 is on the tip conductor, and M1 is on the ring conductor. When the unit is set to MODE, EMULATE EQUIPMENT, the connections are reversed. These leads are used for all connection and trunk types except 4W Phantom E&M.

CABLE 48-0047, 6 FT.

CABLE 48-0048, 6 FT.

CABLE 48-0062, 6 FT.

BANTAM PLUG

310 PLUG

RED (Ring)

GREEN (Tip)

BLACK (Sleeve)

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Model 300056 AM8e E&M Adapter (18-0044) Instruction Manual

2.3.3 Tx/Rx for E2/M2

This is a bantam jack for connection to the E2 and M2 leads. These leads are used only for 4 Wire E&M above). The status of these signaling leads (when used) is indicated by the E2 and M2 indicators directly above the connection. For MODE, MONITORING and EMULATE LINE, E2 is on the tip conductor, and M2 is on the ring conductor. When the unit is set to MODE, EMULATE EQUIPMENT, the connections are reversed.

connection type (in addition to the E1 M1 leads, described

2.3.4 A1/B1 VF Connector

This is a bantam jack connection for the 4W Transmit or 2W Transmit/Receive VF leads. The tip (or A1) is on the tip conductor; the ring (or B1) is on the ring conductor.

Note: In EMULATE LINE or EQUIPMENT, signal flow is out of the E&M Adapter.

When in MONITOR mode, this jack must be connected to the A1 and B1 (transmit) leads from the terminal (line).

2.3.5 A2/B2 VF Connector

This is a bantam jack connection to the Receive VF leads. These leads are used (in addition to the A1 B1 leads) with 4 Wire E&M, 4W E&M connections.

Note: In EMULATE LINE or EQUIPMENT signal flow is into the E&M Adapter.

When in MONITOR mode, this jack must be connected to the A2 and B2 (receive) leads to the terminal (line).

, and 4W Phantom E&M

2.3.6 CO Ground Terminal

This is a yellow binding post located at the left end of the Adapter. It should be used to connect the Central Office ground to the adapter. (A similar binding post on the back of the AM8e VF/PCM Call Analyzer may also be used.) The binding post is recessed so that there will be no interference when the Adapter is secured to the front of the AM8e VF/PCM Call Analyzer for carrying or storage.

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Instruction Manual (18-0044) Model 300056 AM8e E&M Adapter

Used for E&M Types II, III, IV

Used for E&M Types I, II, III, IV, V (except 4W Phantom E&M connection

Used only for 4W E&M connection

HDX VF for 2W E & M

FDX VF for 4W E&M

CO Ground

Yellow Binding Post

RED (Ring)

CO Ground

MONITOR M1

(Rx)

MONITOR E1

MONITOR M2

MONITOR E2

for 4W E & M

Derived E&M Leads for 4W Phantom E&M connection (E&M Type I or V)

(Tx)

(Rx)

FDX VF

BLACK (Sleeve)

M1 E1

E1 M1

(Tx)

(2.3.6)

GREEN (Tip)

boxed items are for EMULATE EQUIPMENT

RED (Ring)

GREEN (Tip)

n. c.

M2 E2

E2 M2

n. c.

EMULATE LINE // MONITOR

E M

EMULATE LINE & MONITOR

(2.3.1)

RED (Ring)

B1 (R)

A1 (T)

E1M1M1E1E2M2M2

Tx RxSB SG A2 B2Tx Rx A1 B1

(2.3.2)

GREEN (Tip)

RED (Ring)

GREEN (Tip)

n. c.

B2 (R1)

A2 (T1)

n. c.

(2.1.8)

(2.3.3) (2.3.4) (2.3.5)

RED (Ring)

GREEN (Tip)

Figure 5. AM8e E&M Adapter Front Panel Connections

2.4 Setting the Operating Conditions

Both the Call Analyzer and E&M Adapter must be configured correctly for the mode, and an appropriate protocol must be selected in the Call Analyzer. This protocol must be designed for translating the incoming PCM signal from the E&M Adapter into Call Analyzer events or for translating the Call Analyzer events into a PCM signal that the E&M Adapter will convert into E, M, and VF signals.

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Model 300056 AM8e E&M Adapter (18-0044) Instruction Manual

The basic steps for setting up, connecting, and using the E&M Adapter follow:

1. Remove the Signaling Adapter from the front of the Call Analyzer by

opening the holding clips on either side, and set it on top of or beside the PCM/VF Call Analyzer.

2. After verifying that the Call Analyzer is turned OFF, connect the 48015600 Ribbon Cable (supplied) between the "TO AM8e" connector on the

Signaling Adapter and the LINE/TIMS connector on the PCM/VF Call Analyzer.

3. Make the appropriate connections for the E&M test configuration. Refer to Figures 1, and 4 - 7 and accompanying descriptive text. For emulation, disconnect through-connections (if not done by test jacks at the CO). For monitoring, leave the connections in place.

4. Turn ON the Call Analyzer and the E&M Adapter, and verify that the PWR indicator on the E&M Adapter is lighted.

5. Set both units to match. (The E&M Adapter may be set directly through the front panel MODE, TYPE, and CONNECTION switches, previously described, or remotely through AM8e commands as described in sub-section 2.5.)

E&M ADAPTER CALL ANALYZER

EMULATE LINE MODE - emulate EMULATE EQUIPMENT MODE - emulate MONITOR MODE - monitor

6. Also set the following Call Analyzer parameters:

IMITATE te/line or switch (not significant for PCM operations) ANALOG/PCM pcm int clk PROTOCOL For the E&M requirements at the test location INPUT PCM2 Channel 1

7. Set the correct TYPE of E&M for the equipment under test.

8. Set the correct CONNECTION type for the equipment under test.

9. To set up other parameters and perform tests, follow the procedures in the Model AM8e PCM/VF Call Analyzer Instruction Manual (18-0035).

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Instruction Manual (18-0044) Model 300056 AM8e E&M Adapter

Note: The E&M Protocol may automatically set the Call Analyzer parameters. If

you have any further questions in setting up the test configuration, applications help is available from 8 AM to 5 PM Pacific Time by contacting Customer Service at the address or phone numbers on the title sheet of this manual.

2.5 Remote Control of E&M Adapter

The E&M Adapter may be set directly through the use of the front panel MODE, TYPE, and CONNECTION switches, or remotely through a terminal connected to

the Call Analyzer's RS232 port. A command is used for setting each switch, and another command is used to read the conditions that have been set up.

2.5.1 Remote Setup (ADP Command)

Each E&M Adapter switch can be set remotely through the use of the following command:

(ADP=xyz) x must be 1 for E&M Adapter

y = switch z= switch selection as shown below

if y then z

0 = MODE 0 = EMULATE LINE

1 = TYPE 0 = I

2 = CONNECTION 0 = 2W E&M

1 = MONITOR 2 = EMULATE EQUIPMENT

1 = II 2 = III 3 = IV 4 = V

1 = 4W E&M 2 = 4W E&M 3 = 4W PHANTOM E&M

As an example, three commands would be required to place the E&M Adapter into monitor mode for a type III, 4 wire E&M connection:

(ADP=101) (ADP=112) (ADP=121)

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Model 300056 AM8e E&M Adapter (18-0044) Instruction Manual

2.5.2 Remote Status (RADP Command)

The settings of the E&M Adapter switches can be read remotely through the use of the following command and response:

command response

(RADP) ADAPTER STATUS = m t c (as shown below)

m = MODE t = TYPE c = CONNECTION

0 = EMULATE LINE 1 = MONITOR 2 = EMULATE EQUIPMENT

0 = I 1 = II 2 = III 3 = IV 4 = V

0 = 2W E&M 1 = 4W E&M 2 = 4W E&M 3 = 4W PHANTOM E&M

As an example, the status for the monitor mode, type III, 4 wire E&M connection:

(RADP) ADAPTER STATUS=121

2.6 Call Analyzer Display and Bit Indicators

When the E&M Adapter and Call Analyzer are processing calls, both the display and the bit indicators (LEDs) on the Call Analyzer front panel provide call information. The display and bit indicators may be read locally or by remote control, as desired. Refer to the AM8e PCM/VF Call Analyzer Instruction Manual for information on the front panel and Remote Control.

Events and details are displayed on the Call Analyzer in accordance with the protocol that is used.

The "Tx" and "Rx", "a" and "b" bit indicators on the Call Analyzer monitor the states of the E&M type indicators (refer to 2.1.5). The "c" and "d" indicators are always set to 1 (ON).

The following diagram shows the relation between the E and M signals as displayed on the front panel of the E&M Adapter, the "a" and "b" indicators on the Call Analyzer front panel, and the open or closed states of the signaling relays (described in sub-section 3.2 and shown in Figure 8).

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Instruction Manual (18-0044) Model 300056 AM8e E&M Adapter

TRUNK STATUS

OFFHOOK

EMULATE EMULATE

OFFHOOK

FAR

abcd

A+B-

RING

OFFHOOK

NEAR

EMULATE

abcd

Bit indicator is ON (1) for signaling circuit relay closed. OFF (0) for relay open.

E2M2M2

Figure 6. Signaling Relationships

When monitoring the Rx and Tx indications with a remote terminal, the E&M protocol will normally use channel 1. All other channels will be inactive.

3. E&M SIGNALING DESCRIPTION

E&M Signaling is a type of DC signaling interface between switching equipment and transmission equipment. It is used in conjunction with VF signaling lines (A1, B1, A2, and B2) and, for some E&M types, ground and battery lines.

S W

T X

Call Analyzer Front Panel Rx and Tx bit displays

c and d indicators are always ON (1)

The b indicator is only valid for 4W E&M connection

E&M Analyzer E and M lead Indicators. Lighted = ON (1) at Call Analyzer

By changing the voltage level or ground/open circuit conditions on the E&M leads, (depending on type) information may be transferred between the switching equipment and the transmission equipment; such as seizure of circuit, seize acknowledgement, circuit release, dial pulsed digits, etc.

The way in which signals are applied to the leads allows each lead to have the same name on both ends of the physical connection between the switching equipment and the line, and permits a tip-tip and ring-ring patching configuration.

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Model 300056 AM8e E&M Adapter (18-0044) Instruction Manual

The E&M Adapter follows these conventions:

• From the switching equipment point of view, the "M" lead typically transmits either a ground or battery condition to the transmission equipment, while the "E" lead typically receives either open or ground signals from the transmission equipment.

Therefore, the front panel of the AM8e E&M Adapter is marked to show this signal direction for the E and M leads for LINE or EQUIPMENT emulation. (MONITOR is the same as LINE).

• From the transmission equipment point of view, the "M" lead typically receives either open or ground signals from the line equipment, while the "E" lead typically transmits either a ground or battery condition to the switching equipment. A second set of markings on the front panel shows these signal directions.

• When the unit is monitoring "E" is assumed to be a signaling output, and M is assumed to be a signaling input.

3.1 Connection Types

The E&M Adapter provides for the four basic E&M connection types. These are

illustrated in Figure 7. (Figure 1 also illustrates the connection of an E&M Adapter and Call Analyzer).

• 2-wire E&M: E1, M1, A1 (tip), B1 (ring)

• 4-wire E&M: E1, M1, A1 (tip), B1 (ring), A2 (tip1), B2 (tip2)

• 4-wire E&M

: E1, M1, E2, M2, A1 (tip), B1 (ring), A2 (tip1), B2 (ring 2)

• 4-wire E&M Phantom: A1, B1, A2, B2. (E-lead signals are carried via the A1 B1 lines, while M-lead signals are carried via the A2 B2 lines.

• In addition to the VF and DC signaling lines, SB (signal battery) and SG (signal ground) leads are used in E&M types II through IV to supply battery and ground signal levels between the signaling ends. (Refer to sub-section 3.2 for the ways in which these leads are used).

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Instruction Manual (18-0044) Model 300056 AM8e E&M Adapter

3.1.1 2-wire E&M

A1 and B1 are bi-directional (half-duplex), acting as both send and receive for VF

signals including voice, DTMF signaling, and MF signaling. The E and M leads send and receive DC signaling voltages in accordance with the E&M type. SB and SG leads are used in types II through IV.

3.1.2 4-wire E&M

A1 and B1 are uni-directional, handling only VF send signals. A2 and B2 are also

uni-directional, handling only VF receive signals (a full-duplex configuration). The E&M leads send and receive signaling voltages in accordance with the E&M type. SB and SG leads are used in types II through IV.

3.1.3 4-wire E&M

A1 and B1 and A2 and B2 are also full duplex for VF signaling. There are two sets

of E&M leads which allow DC signaling from both ends simultaneously. This is a Type V interface which does not require SB or SG leads.

3.1.4 Phantom E&M

A1 and B1 and A2 and B2 are full duplex for VF signaling. Physical E&M

connections are not required because the circuit ends are terminated by center tapped transformers. This configuration is also sometimes called a "derived circuit". The connection to E and M circuits is made via transformer center taps within the equipment (and the E&M Analyzer). Phantom E&M can only be used with a type V connection, because there is no way to transport the SB and SG leads through the derived circuit.

• When in emulate line mode, the E signal is sent via the A1 and B1 leads, while the M signal is received via the A2 and B2 leads.

• When in emulate equipment mode, the M signal is sent via the A1 and B1 leads, while the E signal is received via the A2 and B2 leads.

• When in monitor mode, the E signal can be monitored via the A1 and B1 leads, and the M signal can be monitored via the A2 and B2 leads.

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Model 300056 AM8e E&M Adapter (18-0044) Instruction Manual

EMULATE EQUIPMENT

Switch

Trunk Circuit

(Rx)

(Tx)

T (A1)

R (B1)

T1 (A2)

R1 (B2)

T (A1)

R (B1)

T1 (A2)

R1 (B2)

CONNECTION

2W E&M

T (A1)

R (B1)

4W E&M

T1 (A2)

R1 (B2)

T (A1)

R (B1)

4W E&M

T1 (A2)

R1 (B2)

T (A1)

R (B1)

EMULATE LINE or MONITOR

(Tx)

(Rx)

Signaling Circuit

MODE: Setting on E&M Adapter if it is substituted for (or monitors) the circuit.

TYPE I and V shown. Refer to Figure 8 for ground and battery application to E & M lines and for use of SB and SG leads for TYPEs II, III, and IV.

TYPE V only. Refer to Figure 8 for application of Ground and Battery to E & M leads.

T (A1)

R (B1)

T1 (A2)

R1 (B2)

4W PHANTOM

E&M

T1 (A2)

R1 (B2)

T (A1)

R (B1)

Signaling Circuit

TYPE I or V only. Refer to Figure 8 for application of Ground and Battery to E & M leads.

Switch

Trunk Circuit

Figure 7. E&M Connection Diagrams

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Instruction Manual (18-0044) Model 300056 AM8e E&M Adapter

3.2 E&M Trunk Types

There are five different types of E&M trunk signaling methods (identified by

Roman numerals I, II, III, IV, and V) which are in common use. The types differ mainly in the way Battery and Ground are supplied to the E&M leads. Table 1 summarizes these differences for ON HOOK and OFF HOOK conditions. Figure 8 shows simplified schematic diagrams for each type. Sub-sections 3.2.1 through

3.2.5 describe each type.

3.2.1 E&M TYPE I

The Type I interface is the original E&M Interface. Signaling on the M lead is from

the trunk equipment to the transmission equipment.

• Battery is supplied for Off-Hook condition.

• Ground is supplied for On-Hook condition

• The E lead is used for signaling from the transmission equipment to the

trunk equipment.

• Local transmission equipment facility ground is used for Off-Hook,

• Open circuit is used for On-Hook.

3.2.2 E&M TYPE II

The Type II interface (as well as Types III and IV) makes use of two additional

leads, SB (Signal Battery) and SG (Signal Ground).

In the Type II interface, battery voltage is supplied to the trunk equipment by the

signaling equipment on the SB lead.

The Trunk equipment signals the signaling equipment by opening and closing a

connection between SB and the M lead.

The effect is that the trunk equipment signals the signaling equipment with

battery for Off-Hook and open for On-Hook.

Signaling from the signaling equipment to the trunk equipment is accomplished

by opening and closing a connection between the E lead and ground.

The effect is to signal from the signaling equipment to the trunk equipment with

open for On-Hook and ground for Off-Hook.

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Model 300056 AM8e E&M Adapter (18-0044) Instruction Manual

Table 1. E&M Lead Signaling Conventions

TRUNK TO SIGNALING CIRCUIT SIGNALING TO TRUNK CIRCUIT

TYPE LEAD ON-HOOK OFF-HOOK LEAD ON-HOOK OFF-HOOK

I M Ground Battery E Open Ground

II M Open Battery E Open Ground

III M Ground Battery E Open Ground

IV M Open Ground E Open Ground

V M Open Ground E Open Ground

– 48 V

TYPE I

– 48 V

TYPE II

Trunk Circuit

Figure 8. E&M Trunk Type Battery and Ground Connections (Type I and II)

3.2.3 E&M TYPE III

SENSOR

Trunk Circuit

Signaling Circuit

– 48 V

– 24 V

The Type III interface is essentially the same as the Type I interface in that

signaling on the M lead is with battery for Off-Hook and ground for On-Hook.

The difference between Types I and III is that with Type III signaling, Battery and

Ground used for signaling on the M lead are supplied to the trunk equipment on the SB and SG leads, respectively.

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Instruction Manual (18-0044) Model 300056 AM8e E&M Adapter

3.2.4 E&M TYPE IV

The signaling used with the Type IV interface is essentially the same as the Type II

interface. The difference is in that with Type IV signaling the SB lead is grounded in the signaling equipment, and battery is supplied to the M lead.

The trunk circuit provides a path for the battery to ground by closing the contacts

between M and SB. The effect is to signal with open for On-Hook and ground for Off-Hook.

The E lead is used to signal from the signaling equipment to the trunk equipment

by closing contacts between E and SG in the signaling equipment. The effect is to signal using open for On-Hook and ground for Off-Hook.

3.2.5 E&M TYPE V

Type V is not used in the North American Network, but is the most common E&M

Type outside of North America. Like the Type I interface, the Type V interface does not use the SB and SG leads.

The difference from Type I is that with Type V signaling battery is supplied to the

M lead on the signaling equipment side instead of the trunk equipment side.

The trunk equipment signals to the signaling equipment by closing contacts to

local ground, thereby providing a path for the battery to ground on the M lead. The effect is to signal using open for On-Hook and ground for Off-Hook.

The trunk circuit provides battery to the E lead. Signaling on the E lead is from

the signaling equipment to the trunk equipment by closing contacts from the signaling equipment E lead to local ground. The effect is to signal using open for On-Hook and ground for Off-Hook.

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Model 300056 AM8e E&M Adapter (18-0044) Instruction Manual

TYPE III

TYPE IV

– 48 V

950

SENSOR

Trunk Circuit

SENSOR

Trunk Circuit

– 48 V

– 24 V

Signaling Circuit

– 48 V

Signaling Circuit

– 48 V

TYPE V

Trunk Circuit

Signaling Circuit

Figure 9. E&M Trunk Type Battery and Ground Connections (Type III, IV, and V)

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Instruction Manual (18-0044) Model 300056 AM8e E&M Adapter

APPENDIX A

A.1 Analog R2 Monitoring in AM8e

The user can monitor the R2 digit in 2-wire (loop) Analog circuits by connecting the analog circuit to the A1 B1 leads of the E&M Adapter. None of the other leads are used in this configuration.

A diagram of the configuration is shown in Figure 10.

E&M Adapter

Analog R2

Terminal end

Blocking Capacitors

C1 and C2

can be 100 µF

200 V or higher

Analog R2

Switch end

E1M1M1E1E2M2M2

Tx RxSB SG A2 B2Tx Rx A1 B1

RED (Ring)

GREEN (Tip)

BLACK (Sleeve)

(2.3.4)

480062 cable (or equivalent)

Figure 10. Analog R2 Monitoring

Set switches on the E&M Adapter as follows:

MODE: MONITOR TYPE: V CONNECTION: 2W E&M

Set the Call Analyzer as described in ¶2.4. Protocol selected must have been designed for Analog R2 Monitoring.

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