ZyXEL Communications VOP1372G-61 User manual

www.zyxel.com
www.zyxel.com
VOP1372G-61
72-Port POTS/VoIP Line Card
Copyright © 2011
ZyXEL Communications Corporation
Version 3.97
Edition 1, 05/2011

About This User's Guide
VOP1372G-61 User’s Guide 3
About This User's Guide
IMPORTANT!
READ CAREFULLY BEFORE USE.
KEEP THIS GUIDE FOR FUTURE REFERENCE.
Intended Audience
This manual is intended for users of the VOP1372G VoIP Line Card. It describes detailed information
about the cards’ features and hardware.
Related Documentation
• IES-5106M/IES-5112M/IES-6000M User’s Guide
Refer to this User’s Guide for directions on installation, connections, maintenance, hardware
trouble shooting and safety warnings.
• MSC1000G/1024G/1224G/1024GB/1224GB Series User’s Guide
This User’s Guide covers configuration and the VOP’s default settings.

Document Conventions
VOP1372G-61 User’s Guide
4
Document Conventions
Warnings and Notes
These are how warnings and notes are shown in this User’s Guide.
Warnings tell you about things that could harm you or your device.
Note: Notes tell you other important information (for example, other things you may
need to configure or helpful tips) or recommendations.
Syntax Conventions
• The VOP1372G may be referred to as the “VOP”, the “device”, the “system” or the “line card” in
this User’s Guide.
• “IES” refers to the whole IES-5106M, IES-5112M, or IES-6000M system, including the main
chassis and all associated cards.
• “MSC” refers to the management switch card.
• Product labels, screen names, field labels and field choices are all in bold font.
• A key stroke is denoted by square brackets and uppercase text, for example, [ENTER] means the
“enter” or “return” key on your keyboard.
• “Enter” means for you to type one or more characters and then press the [ENTER] key. “Select”
or “choose” means for you to use one of the predefined choices.
• A right angle bracket ( > ) within a screen name denotes a mouse click. For example,
Maintenance > Log > Log Setting means you first click Maintenance in the navigation panel,
then the Log sub menu and finally the Log Setting tab to get to that screen.
• Units of measurement may denote the “metric” value or the “scientific” value. For example, “k”
for kilo may denote “1000” or “1024”, “M” for mega may denote “1000000” or “1048576” and so
on.

Document Conventions
VOP1372G-61 User’s Guide 5
Icons Used in Figures
Figures in this User’s Guide may use the following generic icons. These icons are not exact
representations of devices.
IES Computer Notebook computer
Server Telephone Switch
Router

Safety Warnings
VOP1372G-61 User’s Guide
6
Safety Warnings
For your safety, be sure to read and follow all warning notices and
instructions.
• Do NOT use this product near water, for example, in a wet basement or near a swimming pool.
• Do NOT expose your device to dampness, dust or corrosive liquids.
• Do NOT store things on the device.
• Do NOT install, use, or service this device during a thunderstorm. There is a remote risk of
electric shock from lightning.
• Connect ONLY suitable accessories to the device.
• Ground yourself (by properly using an anti-static wrist strap, for example) whenever working
with the device’s hardware or connections.
• Do NOT open the device or unit. Opening or removing covers can expose you to dangerous high
voltage points or other risks. ONLY qualified service personnel should service or disassemble this
device. Please contact your vendor for further information.
• Make sure to connect the cables to the correct ports.
• Place connecting cables carefully so that no one will step on them or stumble over them.
• Always disconnect all cables from this device before servicing or disassembling.
• Do not use the device outside, and make sure all the connections are indoors. There is a remote
risk of electric shock from lightning.
• Do NOT obstruct the device ventilation slots, as insufficient airflow may harm your device.
• Always cover empty slots with slot covers to ensure sufficient airflow and reduce the danger of
electric shock.
• Warning! To avoid risk of electric shock, remove only one card at a time and do not place fingers
or objects inside the chassis.
• Use only No. 26 AWG (American Wire Gauge) or larger telecommunication line cord.
Your product is marked with this symbol, which is known as the WEEE mark. WEEE stands for
Waste Electronics and Electrical Equipment. It means that used electrical and electronic
products should not be mixed with general waste. Used electrical and electronic equipment
should be treated separately.

Table of Contents
VOP1372G-61 User’s Guide 7
Table of Contents
About This User's Guide..........................................................................................................3
Document Conventions ...........................................................................................................4
Safety Warnings.......................................................................................................................6
Table of Contents .....................................................................................................................7
Chapter 1
Introducing the VOP1372G ......................................................................................................9
1.1 VOP1372G Overview .............................................................................................................9
1.2 General Features ...................................................................................................................9
1.2.1 H.248 Features ...........................................................................................................13
1.3 Front Panel Ports and LEDs ...............................................................................................15
1.4 Default Settings ....................................................................................................................16
Chapter 2
Product Specifications...........................................................................................................17
2.1 Product Specifications ..........................................................................................................17
2.2 Firmware Naming Conventions ............................................................................................19
2.3 Telco-50 Connector Pin Assignments ..................................................................................19
2.3.1 VOP Connectors .........................................................................................................20
2.3.2 Telco-50 Cables ..........................................................................................................23
2.4 Wire Gauge Specifications ...................................................................................................24
2.5 Console Cable Pin Assignments ..........................................................................................24
Chapter 3
Troubleshooting......................................................................................................................25
3.1 Power and LEDs ..................................................................................................................25
3.2 Phone Calls ..........................................................................................................................26
3.3 Management and Configuration ...........................................................................................26
3.3.1 Uploading the Default Configuration File via Boot Commands ..................................27
3.3.2 Uploading the Firmware via Boot Commands ............................................................28
Appendix A Legal Information................................................................................................31
Index ........................................................................................................................................35

Table of Contents
VOP1372G-61 User’s Guide
8

VOP1372G-61 User’s Guide 9
CHAPTER 1
Introducing the VOP1372G
This chapter introduces the VoIP line card's general features and hardware.
1.1 VOP1372G Overview
The VOP1372G VoIP Line Card is perfect for telecommunications providers, ISPs or large building
applications seeking to provide phone service via Voice over IP (VoIP) to subscribers while
minimizing costs. One VOP provides VoIP telephony service for up to 72 subscribers over existing
POTS telephone wiring.
The line to and from the user carries either voice alone, or both voice and data (ADSL/VDSL)
signals. For each line, a splitter card separates the high frequency ADSL/VDSL signal from the voice
band signal and feeds the voice band signal to the VOP1372G, while the ADSL/VDSL signal is
diverted to the ADSL/VDSL line card (ALC1372G or VLC1348G, for example).
The VOP1372G supports H.248 (also known as MEGACO - MEdia GAteway COntrol - or the Gateway
Control Protocol).
• Each VOP with H.248 firmware can operate as an individual media gateway or as part of a
centralized H.248 interface capable of spanning multiple VOPs or chassis and managing up to
1200 subscribers. You can use a backup VOP card for higher reliability of H.248 protocol
processing.
Use the Telco-50 connector pin assignments in Section 2.3 on page 19 along with the directions and
safety warnings in the IES’s User's Guide to install the line card and make the necessary
connections.
See the MSC’s User’s Guide for detailed information on configuring the line card.
1.2 General Features
System Monitoring
• System status (link status, rates, statistics counters)
• Temperatures, voltage reports and alarms.
• Port status (on/off hook, etc.)
Alarms
The VOP sends an alarm to the management system when voltage or temperature levels exceed
safe thresholds.

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Alarm LED
An ALM (alarm) LED lights when the VOP is overheated, the voltage readings are outside the
tolerance levels, or there is a hardware failure.
System Error Logging
The system error log will record error logs locally to the management switch card memory.
Remote Firmware Upgrade
You can use FTP or SFTP to perform configuration backup/restore and firmware upgrade from a
remote location.
Voice Compression and Decompression
The VOP supports the following voice codecs.
• G.711 A-law
• G.711 µ-law
• G.723.1
• G.726 (40, 32, 24 and 16 kbps)
• G.729AB
Out-of-Band POTS Signaling
As well as transmitting and receiving voice band data, the VOP can communicate with the
subscriber’s phone using out-of-band signals.
Call Progress Tones
The VOP can provide the following tones to connected telephones:
Table 1 Out-of-Band POTS Signaling
SIGNAL DESCRIPTION
Off Hook The subscriber intends to start a call.
On Hook The subscriber terminates the call.
Flash Short on-hook “tap” for special call functions.
Pulse Dial Dialing method using an interrupted signal.
Ring AC power signal from FXS port indicating a phone call attempt from remote party.
Tip/Ring Reversal FXS port reverses the voltage between the tip and the ring
Metering Tone FXS port sends a 12 /16kHz out-of-band sine wave for payphone use.
Table 2 Supported Tones
TONE INDICATION
Dial tone A line is available for use.
Busy tone The dialed number is unreachable.
Congestion tone There are not enough resources to handle a call.

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VOP1372G-61 User’s Guide 11
Configurable POTS Ring Patterns
You can configure POTS (Plain Old Telephony Service) distinctive ring patterns. These ring patterns
define the ring the VOP sends to the connected POTS phones for incoming calls.
European and USA Supplementary Phone Services
The VOP supports both European and American style supplementary phone services (call hold, call
waiting, call transfer and three-way conference calls).
IEEE 802.1Q Tagged VLAN
Your VOP uses the IEEE 802.1Q Tagged VLAN (Virtual Local Area Network), which allows it to
deliver tagged/untagged frames. The IES supports up to 4094 individual VLANs.
Quality of Service (QoS)
The VOP supports IEEE 802.1p QoS (Quality of Service) network traffic prioritization for RTP traffic,
as well as DSCP (Differentiated Services Code Point) and ToS (Type of Service) tagging.
3-way Conference Call
The VOP can combine two calls of different codecs into the same conference call.
Analog Modem Pass-through
The VOP supports analog modem service over the voice channel.
Fax Pass-through and T.38 Relay
The VOP supports fax service over the voice channel using G.711 or using T.38 relay.
Country Code
Many settings governing call functions differ from one region to another. The VOP allows you to set
these by entering a preconfigured country code. The following variables are affected when you set
the country code.
Ringback tone The remote party’s phone is ringing.
Waiting tone The other party’s line is engaged.
Howler tone The handset has been left off-hook too long.
Message Waiting
Indication (MWI) tone A voicemail message is waiting.
Holding tone The caller has been placed on hold.
Distinctive ring The VOP has a list of ring patterns based on country codes that the H.248 Media
Gateway Controller (MGC) can have the VOP send to the connected telephones.
Table 2 Supported Tones
TONE INDICATION

Chapter 1 Introducing the VOP1372G
VOP1372G-61 User’s Guide
12
•ACimpedance
• PCM companding law
•Cadencering
•Flashtime
• Pulse dial interval
• Pay-signal type
•CallerID
•Servicetones
Metallic Line Test
The VOP provides the following metallic line test (MLT) measurements.
• Foreign AC voltage (50Hz ~ 500Hz)
•ForeignDCvoltage
• Hazardous potential test
• Three-element capacitance test
• Three-element resistance test
• Ringing equivalency number test (REN measurement)
• Metering voltage
• Dial tone
• Digit
• Receiver off hook
RTP Statistics
The VOP provides the following RTP statistics.
• RTP TX codec
•RTPRXcodec
• RTP TX payload type
• RTP RX payload type
• RTP local IP/port
•RTPremoteIP/port
Echo Cancellation
The device supports G.168, an ITU-T standard for eliminating the echo caused by the sound of your
voice reverberating in the telephone receiver while you talk.
Voice Activity Detection
Voice Activity Detection (VAD) reduces the bandwidth that a call uses by not transmitting when you
are not speaking.

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VOP1372G-61 User’s Guide 13
Comfort Noise Generation
Your device generates background noise to fill moments of silence when the other device in a call
stops transmitting because the other party is not speaking (as total silence could easily be mistaken
for a lost connection).
Dynamic Jitter Buffer
The built-in adaptive buffer helps to smooth out the variations in delay (jitter) for voice traffic. This
helps ensure good voice quality for your conversations.
Tx/Rx Gain
The VOP allows you to increase or decrease the volume of the audio signal sent to and received
from the subscriber.
VPI (Voice Packetization Interval)
The VOP allows you to configure the amount of audio information (measured in milliseconds)
contained in each packet of data transmitted.
1.2.1 H.248 Features
Centralized and De-centralized Structure
For ease of management, you can use multiple VOPs as part of a centralized H.248 interface that
can span across multiple VOPs and even multiple chassis in order to manage up to 1200
subscribers. A centralized H.248 interface makes it easy to scale up as the number of subscribers
increases. You can add cards and subscribers with a minimum of configuration and without
interrupting existing DSL or VoIP services. The following graphic shows an H.248 interface that
includes VOPs in three different chassis.
Figure 1 Centralized VOP Deployment
H.248 Interface

Chapter 1 Introducing the VOP1372G
VOP1372G-61 User’s Guide
14
You can also deploy individual VOPs with H.248 firmware as stand-alone H.248 interfaces. The
following graphic shows VOPs in three different chassis where each VOP is configured as a separate
H.248 interface.
Figure 2 De-centralized VOPs Deployment
MGC Redundancy for Higher Reliability
You can configure the H.248 interface to use a second (backup) MGC in case the first MGC is not
available.
Figure 3 MGC Redundancy
H.248 Signaling Card Redundancy for Higher Reliability
An H.248 interface consists of a “Signaling Card” (SC) and at least one “Media Card” (MC). A
VOP1372G-61 can act as either an SC, an MC, or both. The SC processes H.248 protocol messages
H.248 Interface
H.248 Interface
H.248 Interface
H.248 Interface
H.248 Interface
H.248 Interface
H.248 Interface
H.248 Interface
H.248 Interface
H.248 Interface
H.248 Interface
H.248 Interface
H.248 Interface
H.248 Interface
H.248 Interface
H.248 Interface
H.248 Interface
H.248 Interface H.248 Interface
H.248 Interface
H.248 Interface
H.248 Interface
H.248 Interface
H.248 Interface
CD
MG
MGC 2
ANALOG IP NETWORK
MGC 1

Chapter 1 Introducing the VOP1372G
VOP1372G-61 User’s Guide 15
from the MGC. The MC handles the RTP payload and converts it into analog for the subscriber’s
phone. The MCs are also known as an SC’s slaves. You can install a second VOP card to back up the
H.248 interface’s SC. If the active SC fails, the backup SC takes over the processing of the H.248
protocol messages so the H.248 interface can continue to provide service.
Figure 4 H.248 Interface with Backup Signaling Card
Remote Ringback Tone Generation
The VOP can send a remote ringback tone to the caller so they hear that the phone connected to
the VOP is ringing.
Call Overload Protection
You can configure how many calls the H.248 interface is to handle. This protects against
overloading the VOP cards or the MGC.
1.3 Front Panel Ports and LEDs
The figure below shows the front panel of the VOP.
Figure 5 Front Panel
Standby SC
Media Gateway
Active SC
MC
MC
MC
MC
H.248 Interface
Backup Media Gateway

Chapter 1 Introducing the VOP1372G
VOP1372G-61 User’s Guide
16
The following table describes the port labels on the front panel.
The following table describes the LED indicators on the front panel of the VOP.
1.4 Default Settings
Refer to your MSC’s User’s Guide for information on default settings.
Table 3 Front Panel Ports
LABEL DESCRIPTION
CONSOLE For troubleshooting purposes, this mini RJ-11port connects to a computer when the
line card is not manageable from the MSC.
1-24, 25-48, 49-72 These Telco-50 connectors are for connecting the VOP to the splitter cards.
Table 4 LED Descriptions
LED COLOR STATUS DESCRIPTION
PWR Green On The line card is turned on.
Off The line card is off.
SYS Green Blinking The line card is rebooting and performing self-diagnostic tests.
On The line card is on and functioning properly.
Off The power is off, or the line card is malfunctioning.
ALM Red On The temperature or voltage is outside the safe range, or there is a hardware
failure.
Off The temperature or voltage is inside the safe range and the VOP is functioning
normally.

VOP1372G-61 User’s Guide 17
CHAPTER 2
Product Specifications
This chapter gives details about the line card hardware and features.
2.1 Product Specifications
Table 5 Device Specifications
Dimensions 390.6 mm (W) x 240.0 mm (D) x 24.0 mm (H)
Weight 1.4 kg
Power requirement -36 to -72 Volts DC, no tolerance
Power consumption 144 Watt Maximum
Interface • Three Telco-50 connectors: 72 Phone Ports
• One mini RJ11 console port for local management
Uplink Port 1 Gigabit Ethernet (SerDes) backplane connection
Operation Temperature -40º C ~ 65º C
Storage Temperature -40º C ~ 70º C
Operation Humidity 10% ~ 90% RH (non-condensing)
Storage Humidity 10% ~ 95% RH (non-condensing)
Certifications •RoHScompliant
• ETSI 300-019
•NEBSlevel3
•K.20
Safety
• EN60950-1
• CSA60950-1
• UL60950-1
• IEC60950-1
EMC
• FCC Part 15 Class A
• EN55022 Class A
• EN55024 Class A
• ETSI 300 386
• IEC-61000-4-2 Level 2

Chapter 2 Product Specifications
VOP1372G-61 User’s Guide
18
Other Features • H.248 (MEGACO) support
• IEEE 802.1Q VLAN Tagging
• IEEE 802.1p CoS with Priority Queuing
• System error logging
• Out-of-band POTS signaling
• Numbering plan
• CLIP and CLIR
•Countrycode
•MetallicLineTest(MLT)
• External testing device support
•RTPstatisticsgeneration
• Local RTP switching
• Centralized and de-centralized H.248 interface structure
• H.248 MGC redundancy
• H.248 VOP signaling card redundancy
• H.248 remote ring back tone generation
• H.248 call overload protection
Ringer Output Amplitude Adjustable (25 ~ 90 Vrms)
Output Ringing
Frequency Adjustable (16.7 / 20 / 25 / 50 Hz)
Ringer Output Power Maximum 15W
Peak BHCA A VOP card can support up to 20,000 Busy Hour Call Attempts (BHCA) per hour
and 3.3 call setups per second.
Digital signal processing
features • •IP/UDP/RTP encapsulation
• Supported voice codecs:
G.711 A-law
G.711 µ-law
G.723.1
G.726 (40, 32, and 24 bit)
G.729 (G.729A and G.729B)
• T.38 fax / modem passthrough and relay
• V.21 fax tone detection
• V.23 FSK Caller ID generation
• Bellcore FSK caller ID generation
• 3-way conference call support
• DTMF detection and relay
• G.168 echo cancellation
• Silence detection and suppression
• Comfort noise generation
• Voice activity detection
• Caller ID generation
• Billing signal generation (12 / 16 kHz metering tone)
• Tone generation:
Dial tone
Busy tone
Congestion tone
Ringback tone
Waiting tone
Howler tone
Distinctive ring
• Packet loss concealment
•Tx/Rxgain
• VPI (Voice Packetization Interval)
•MWItone
•Holdingtone
Table 5 Device Specifications

Chapter 2 Product Specifications
VOP1372G-61 User’s Guide 19
2.2 Firmware Naming Conventions
A firmware version includes the model code and release number as shown in the following example.
2.3 Telco-50 Connector Pin Assignments
This section describes the pin assignments on the VOP’s Telco-50 connectors, and on the cables
that connect to the VOP.
Loop diagnostics • Metallic Loop Test (MLT) for subscriber lines:
Hazardous potential test
Foreign voltage test
Three-element capacitance test
Three-element resistance test
Ringing equivalency number test (REN measurement)
Standards Compliance • RFC 3525 (Gateway Control Protocol)
• ITU-T H.248-1
• IEEE 802.1Q (Virtual LANs)
Table 5 Device Specifications
Firmware Version: V3.97(UHE.0)
“UHE” is the model code.
"0" is the firmware’s release number. This varies as new firmware is released. Your firmware's
release number may not match what is displayed in this User's Guide.

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20
2.3.1 VOP Connectors
The following diagrams show the pin assignments of the Telco-50 connectors on the VOP. The
diagrams show the Telco-50 connector as seen when looking at the front panel of the VOP.
Figure 6 1-24 Port Telco-50 Pin Assignments
Figure 7 25-48 Port Telco-50 Pin Assignments
Figure 8 49-72 Port Telco-50 Pin Assignments