Summary of Contents for Datacom DM991C
- Page 1 DM991 SERIES V DM991C DM991CE DM991S DM991SE PRODUCT MANUAL 204.4092.08 rev. 08 Date: 8/12/2008...
- Page 2 Although this document has been written with care, the company does not assume responsibility for occasional mistakes and omissions in its content. Likewise, DATACOM is not liable for any damages that may result from the use of the information contained in this manual. Specifications provided in this manual are subject to changes without any previous notice and should not be construed as a commitment of any kind by DATACOM.
- Page 3 CONTACTS In order to contact the DATACOM technical support, or sales department: Support E-mail: suporte@datacom.ind.br Phone: +55 51 3358-0122 Fax: +55 51 3358-0101 • Sales E-mail: comercial@datacom.ind.br Phone: +55 51 3358-0100 Fax: +55 51 3358-0101 • Internet www.datacom.ind.br • Address DATACOM Av.
- Page 4 CONVENTIONS In order to improve the agreement, the following conventions are made throughout this manual: hyperlink - Indicates an internet site or an e-mail address. Command or Button - Always that some reference to a command, a button or a software menu is made, this indication will be in italic.
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Page 5: Table Of Contents
1. GENERAL RECOMMENDATION..........10 2. INTRODUCTION................11 2.1. DM991S/SE 2W/4W..................... 11 2.1.1. Front Panel ..........................11 2.1.2. Back Panel ..........................12 2.2. DM991C/CE 2W/4W .................... 13 2.2.1. Front Panel ..........................13 2.2.2. Back Panel ..........................14 3. G.SHDSL INTERFACE ..............15 3.1. Interface Characteristics..................16 3.2. - Page 6 8.5. Timeslot 16 Enabling (DIP B2) ................34 8.6. CRC4 Enabling (DIP B3) ..................34 8.7. E1/Digital interface selection (DIP B4)..............34 8.8. Terminal type (DIP B5)..................35 8.9. Configuration (DIP B6) ..................35 8.10. Converter Mode / Ethernet interface enabling (DIP B7)........35 8.10.1.
- Page 7 16.2.2. G.703 Interface Electricial Characteristics for Twisted Pair............74 17. PANEL LEDS ................75 17.1. DM991S/SE Modems Front Panel LEDs ............75 17.2. DM991C/CE Modems Front Panel LEDs............76 18. STRAPS AND DIP SWITCHES MAP ...........78 18.1. DM991S/SE ....................... 78 18.2. DM991C/CE ....................... 78 18.2.1.
- Page 8 HDB3 coding in the G.703 2048kbit/s Interface........74 Figure 35. DM991S/SE - Straps and DIPs map............. 78 Figure 36. DM991C/CE – Map of Straps (PCI rev. 03 ou inferior) ......79 Figure 37. DM991C/CE – Map of Straps (PCI rev. 03 ou superior) ....... 80 Figure 38.
- Page 9 DM991S/SE - DB9 Connector Pinout ............12 Table 2. DM991SE - RJ45 Connector Pinout ............12 Table 3. DM991C/CE - DB9 Connector Pinout ............14 Table 4. DM991CE - RJ45 Connector Pinout ............14 Table 5. DM991S/SE - G.shdsl Interface Pinout............ 15 Table 6.
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Page 10: General Recommendation
Before connecting any cable to the equipment, make sure that the grounding system is functional. To prevent risks of electric shock, before opening the DM991C/CE equipments, disconnect the power supply. -
Page 11: Introduction
Its G.shdsl interface may operate with 2 or 4 wires. • DM991CE 2W – The same as the DM991C model, however it has the option to work as Bridge as well. Its G.shdsl interface works on 2 wires. -
Page 12: Back Panel
Figure 2. Front Panel - DM991SE 2W Figure 3. Front Panel - DM991S 4W Figure 4. Front Panel - DM991SE 4W • Signaling LEDs –The meaning of each LED can be found on Table 22. • DB9 - The DB9 connector in the front panel is used to configure the equipment via terminal (communication serial port). -
Page 13: Dm991C/Ce 2W/4W
2.2.1. Front Panel The Figure 6 represents the DM991C 2W modem panel, Figure 7 represents the DM991CE 2W modem panel, Figure 8 presents the DM991C 4W modem and the Figure 9 presents the DM991CE 4W modem Figure 6. DM991C 2W Front Panel Figure 7. -
Page 14: Figure 10. Dm991C/Ce Back Panel
Transmited data: - wire Table 4. DM991CE - RJ45 Connector Pinout 2.2.2. Back Panel Figure 10 represents the back panel of the DM991C/CE modens: Figure 10. DM991C/CE Back Panel • 75ohms Connectors – connection for G.703 interface for coaxial cable with 75ohms impedance, available in BNC connectors;... -
Page 15: Table 5. Dm991S/Se - G.shdsl Interface Pinout
G.SHDSL INTERFACE The DM991S/SE modem G.shdsl interface presents connection through the screw connector block, as seen in Table 5. The DM991C/CE modem G.shdsl interface presents connection through an RJ45 with pinout as shown in Table 6. screw connector Signal Port... -
Page 16: Interface Characteristics
The cabinets destined to the DM991S/SE models usually have primary protection devices, so these models do not come with additional sparklers. 3.1. Interface Characteristics ITU-T Recommendation G.991.2 describes transmission method data transport telecommunication access networks over twisted pairs in the full-duplex mode, with echo canceling. The interface operate in lines of type 135ohms balanced. -
Page 17: Data Mode
In the activation stage, the DSL interface LED blinks once a second (on and off times are equal). 3.4. Data Mode This is the final stage, where the modem transmits data normally. It will use the final G.shdsl frame, sending information as negotiated during handshake and using the coefficients that were calculated after the transmission line was evaluated during the training period. -
Page 18: Crc Anomaly
Name Description 1-14 sw1-sw14 Frame Sync Word fbit1/losd Fixed Indicator bit #1 (Loss of Signal) fbit2/sega Fixed Indicator bit #2 (Segment Anomaly) 17 -> k+16 Payload block #1 K + 17 eoc01 EOC bit #1 K + 18 eoc02 EOC bit #2 K + 19 eoc03 EOC bit #3... -
Page 19: Snr Margin Defect
3.4.4. SNR Margin Defect An SNR margin defect occurs when the signal-to-noise ratio falls below the specified margin, i.e., when the signal quality is too poor. The standard signal-to-noise ratio for the DM991 G.shdsl interface is 6 dB. 3.4.5. LOSW Defect An LOSW (Loss of Sync Word Defect) defect shall be declared when at least three consecutive received frames contain one or more errors in the framing bits. -
Page 20: Annex
When set up in synchronous mode, the line clock becomes the same as the data clock. The precision of such clock gets to be, thus, the same as the precision of the clock that is selected as the equipment synchronization clock. Recommendation G.991.2 states that the clock precision shall be within ± 32 ppm, regardless of the clock scheme selected, so it is up to the user to set up a clock with such precision so as to operate within the Recommendation bounds (or the user can use a less precise clock, operating out of the Recommendation). -
Page 21: Four Wire Operation (4W)
When the analogue lines of the G.shdsl interface pass through paths that can suffer from electric or atmospheric discharges, it is recommended that the user adds primary protection devices to the lines. The G.shdsl interface of models DM991C and DM991CE already has sparkler devices, among others, as primary protection. -
Page 22: V.35-V36/V.11 Digital Interface
In the case of DM991S/SE modems, that pinning can be changed to the Telebrás standard through straps. In the case of DM991C/CE modems, you have the option of asking for equipment with a pinning selections between ISO2110 Amd.1 and Telebrás standard through straps. - Page 23 V.35 Interface Pinout † For DM991S/SE only (or optionally for DM991C/CE). ‡ On DM991C V.35-V.36/V.11 interfaces, the CT109 signal presents the aggregate state (G.shdsl), remaining off while it is in error condition (except when there is CRC error). * For ISO2110 Amd. 1, the ERCa (22) and ERCb (23) pins do not correspond to the CT128.
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Page 24: Table 11. V.35 Interface Pinout
V.35 Interface Pinout † For DM991S/SE only (or optionally for DM991C/CE). ‡ On DM991C V.35-V.36/V.11 interfaces, the CT109 signal presents the aggregate state (G.shdsl), remaining off while it is in error condition (except when there is CRC error). * For ISO2110 Amd. 1, the ERCa (22) and ERCb (23) pins do not correspond to the CT128. -
Page 25: G.703 - G.704 Interface
G.703 signal pulses, which can cause wrong bits, working intermittently, or even completely stopping the circuit activation. In case the cabinet or shelf was made by DATACOM or has gas-filled valve arrester instead of varistors, no changes are required. -
Page 26: Dm991C/Ce
There are straps that allow you to connect the external coaxial cable network to the ground. On models DM991C/CE with PCI rev. 04 or higher, this applies both to the input channel (RX-IN) and to the output channel (TX-OUT). On models DM991C/CE with PCI rev. 03 or lower, this applies only to the input channel (RX-IN);... -
Page 27: Ethernet Interface
ETHERNET INTERFACE The DM991SE and DM991CE Ethernet interfaces allow interconnecting two LANs thru G.shdsl aggregated. It can be configured to Nx64kbit/s speed, to the aggregate configured limit. This tributary can be used joined with other modem tributaries. Accepts packets of up to 1552 bytes, supporting VLAN. 6.1. - Page 28 • Link Speed – it is possible operation velocity on the interface at 100Mbits/s or 10Mbits/s; • Flow control - allows enabling flow control on the interface. Should it be operating on Full Duplex mode, pause frames will be used. Should it be on Half Duplex mode, back pressure mode will be used;...
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Page 29: Straps
STRAPS The DM991S/SE modems present substantial differences in relation to the DM991C/CE modems as to the configurations done through strapping, in such a way that the sub chapter 7.1 verses on the DM991S/SE modems strapping and sub-chapter 7.2 verse on the DM991C/CE modems strapping. -
Page 30: Digital Interface Selection (E16, E18 And E20)
Position 0-1: Telebrás standard pinout. Position 0-2: ISO2110 Amd.1 standard pinout - factory standard. 7.2. DM991C/CE 7.2.1. G.703 Interface Cable Selection (E2, E3 and E25) Position 120: selects the use of twisted pair, meaning it operates in the G.703 interface with 120ohms impedance. -
Page 31: Digital Interface Selection (E10, E12 And E13)
7.2.5. Pinning on connector DB25 (E500 to E522) – Optional As an option, DM991C/CE equipment can come from the factory with straps E500 to E522. These straps allow you to select the pinning standard for connector DB25 in digital interface V.35-V.36/V.11. -
Page 32: Speed Selection (Dips A1 To A)
DIP-SWITCHES Only the DM991S/SE modems have DIP-switches, however, these equipments, as well as the DM991C/CE modems can also be configured via terminal. 8.1. Speed Selection (DIPs A1 to A5) DIPs A1 to A5 select the transmission rate in the line and in the enabled tributary interface. If the modem is configured as NTU (DIP B5 on OFF), DIPs A1 to A5 will determine only the rate of the tributary interface, the line rate being defined by the LTU configuration. -
Page 33: Clock Selection (Dips A6 And A)
Number of Speed channels 2048 kbit/s 64 kbit/s 128 kbit/s OFF* OFF* OFF* 192 kbit/s 256 kbit/s 320 kbit/s 384 kbit/s 448 kbit/s 512 kbit/s 576 kbit/s 640 kbit/s 704 kbit/s 768 kbit/s 832 kbit/s 896 kbit/s 960 kbit/s 1024 kbit/s 1088 kbit/s 1152 kbit/s 1216 kbit/s... -
Page 34: Ldr Enabling (Dip A)
The external clock is provided by the DTE through the CT113 in the digital interface or recovered through the G.703 signal, depending on which interface is enabled. The DTE should provide it with ±50ppm precision for connection in plesiochronous mode and ±32ppm for connection in synchronous (to operate according to the G.991.2 rule). -
Page 35: Terminal Type (Dip B5)
8.8. Terminal type (DIP B5) When ON, configures the modem as STU-C or LTU. When OFF, configures the modem as STU-R or NTU. When the modem is configured as NTU, DIPs A1-A5 determines the transmission rate of the interface selected by B4. When the modem is configured in LTU, the frame mode is plesiochronous and the annex is automatic (in relation to the DIP-switches configuration). -
Page 36: Dips Summary
8.12. DIPs Summary Function OPERATION POSITION ⊥ A1 to A5 Speed selection Table See table Internal OFF / ON External ON / OFF * A6/A7 Transmissio clock Regenerated OFF / OFF External RX ON / ON Accepts LDR request Does not accept OFF* Enabled... -
Page 37: Operation Description
Through the DMG20 management card, that acts as an SNMP proxy agent, communicating with the DM991S/SE through the RS485 interface with the Telebrás protocol for modem management in sub-racks. Can be integrated to the DATACOM equipments management system using the DmView software;... -
Page 38: Plesiochronous Mode
• Regenerated from the E1 interface - Is provided by the DTE through the G.703 signal of the E1 interface. • Regenerated from the digital interface - Is provided by the DTE through the CT113 signal. The digital interface must have the clock configured as external (CT113) or CT104 sinc. CT113. -
Page 39: Synchronous Mode
The scheme is very similar to the ones already showed. The external clock coming form the V.35 in the LTU equipment is passed to the DSL interface, which in its turn is passed to the E1 and digital interfaces of the NTU equipment. The same happens the other way around (clock coming from the V.35 in the NTU passes trough the DSL interface and goes to the E1 and digital interfaces in the LTU). -
Page 40: Ct104 Sinc. Ct113
Figure 19 shows how a digital interface configured as external works when a DM991, with regenerated clock from the DSL, is connected to an ECD equipment. The traced arrow indicates that the CT115 derives from the DSL interface regenerated clock. The doted arrow indicates that the equipment uses as transmission clock (CT114) the clock provided by the ECD through the CT113. -
Page 41: Ct128 Enabled
9.4. Converter Mode Equipment DM991S and DM991C can also operate as interface converters, converting G.703 signals (bit rate of 2048kbit/s), with frame structure according to G.704, to V.35 or V.36/V.11 interface signals. In this mode, the G.shdsl interface is disabled. -
Page 42: Terminal Management
The terminal has a 10 minute timeout, in a way that if nothing is typed in that time, it returns to the password identification screen. Bellow are described the configuration and management menus. -------------------------------------------------------------------------- D A T A C O M DM991C - G.SHDSL Modem - E1 and V.35 Interfaces -------------------------------------------------------------------------- 1 - Choose equipment to configure 2 - Equipment information... -
Page 43: Equipment Information
In the DM991S/SE equipments it is necessary to use the option "E" and wait 10 minutes so the Telebrás management goes back on. 10.1. Equipment Information -------------------------------------------------------------------------- D A T A C O M DM991C - G.SHDSL Modem - E1 and V.35 Interfaces -------------------------------------------------------------------------- Equipment Information Product code :[ 3011... -
Page 44: Password Configuration
10.2. Password Configuration -------------------------------------------------------------------------- D A T A C O M DM991C - G.SHDSL Modem - E1 and V.35 Interfaces -------------------------------------------------------------------------- Password Configuration 1 - Enable or disable terminal access password on initialization 2 - Change terminal access password Option: [ ] -------------------------------------------------------------------------- <ESC>... -
Page 45: Choosing Equipment To Be Configured
-------------------------------------------------------------------------- D A T A C O M DM991C - G.SHDSL Modem - E1 and V.35 Interfaces -------------------------------------------------------------------------- Choose Equipment *1 - DM991C - G.SHDSL Modem - E1 and V.35 Interfaces Option: [ ] -------------------------------------------------------------------------- <ESC> Back <ENTER> Refresh -------------------------------------------------------------------------- In this menu the user chooses if he wishes to configure the local or the remote equipment, as long as it is enabled for remote configuration. -
Page 46: Configuration Menu
• F - Firmware download for both local and remote equipment: allows the firmware download to be done, for future upgrades. The download can be for either the local as for the remote modem. 10.5. Configuration Menu In this configuration menu the user has access to all information of the equipment. All configurations made in the sub-menus of this equipment are saved in a user memory, which will need to be activated in order for the equipment to be configured in the desired manner. - Page 47 -------------------------------------------------------------------------- D A T A C O M [ 1 ] DM991CE - G.SHDSL Modem With Ethernet Bridge -------------------------------------------------------------------------- Configuration Menu G - General configuration D - G.SHDSL interface V - V.35 interface E - E1 interface B - BRIDGE interface 1 - Test user configuration 2 - Update changes (User->Equipment) 3 - Reload equipment configuration (Equipment->User)
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Page 48: Equipment General Configurations Menu
EOC on the G.shdsl interface or to disable the G.shdsl interface (enable converter mode). -------------------------------------------------------------------------- D A T A C O M [ 1 ] DM991C - G.SHDSL Modem - E1 and V.35 Interfaces -------------------------------------------------------------------------- General Configuration Clock source :[ Regenerated from G.SHDSL ]... -
Page 49: G.shdsl Interface Configuration Menu
Enable Operation: enables or disables the interface, when disabled the modem to take on Converter Mode. This option is available only for models DM991S and DM991C. In order to disable the G.shdsl interface, you have to enable the destructive settings in the general equipment settings menu. -
Page 50: Digital Interface Configuration Menu
10.5.3. Digital Interface Configuration Menu -------------------------------------------------------------------------- D A T A C O M [ 1 ] DM991C - G.SHDSL Modem - E1 and V.35 Interfaces -------------------------------------------------------------------------- V.35 Configuration Enable operation :[ No Enable tests :[ Yes Number of channels :[ 01... -
Page 51: E1 Interface Configuration Menu
Available in FW version 110. 10.5.4. E1 Interface Configuration Menu -------------------------------------------------------------------------- D A T A C O M [ 1 ] DM991C - G.SHDSL Modem - E1 and V.35 Interfaces -------------------------------------------------------------------------- E1 Configuration Enable operation :[ Yes Enable tests... -
Page 52: Bridge Interface Configuration Menu (Only For Dm991Ce And Dm991Se)
Drop insert: insert: this configuration makes the received unused timeslots to be retransmitted, enabling the drop insert of several equipments in the same E1 link; Idle: this configuration retransmits the user configured value in the “Idle byte” parameter, in each unused timeslot. 10.5.5. - Page 53 -------------------------------------------------------------------------- D A T A C O M [ 1 ] DM991C - G.SHDSL Modem - E1 and V.35 Interfaces -------------------------------------------------------------------------- Tests Menu D - G.SHDSL interface V - V.35 interface E - E1 interface Option: [ ] -------------------------------------------------------------------------- <ESC> Back...
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Page 54: G.shdsl Interface Test Menu
10.6.1. G.shdsl Interface Test Menu -------------------------------------------------------------------------- D A T A C O M [ 1 ] DM991C - G.SHDSL Modem - E1 and V.35 Interfaces -------------------------------------------------------------------------- G.SHDSL Tests 1 - Stop testing 2 - Start LDL test 3 - Start LAL test... -
Page 55: E1 Interface Test Menu
10.6.3. E1 Interface Test Menu -------------------------------------------------------------------------- D A T A C O M [ 1 ] DM991C - G.SHDSL Modem - E1 and V.35 Interfaces -------------------------------------------------------------------------- E1 Tests 1 - Stop testing 2 - Start LDL test 3 - Start LAL test... -
Page 56: Equipment Status Menu
10.7.1. Equipment Status Menu -------------------------------------------------------------------------- D A T A C O M [ 1 ] DM991C - G.SHDSL Modem - E1 and V.35 Interfaces -------------------------------------------------------------------------- Equipment Status Current test :[ No active tests Device 2048 clock source :[ Internal (regen. failed) ]... -
Page 57: Digital Interface Status Menu
Modulation: Shows the modulation (16-TCPAM) negotiated during the handshake. Available in FW version 110. 10.7.3. Digital Interface Status Menu -------------------------------------------------------------------------- D A T A C O M [ 1 ] DM991C - G.SHDSL Modem - E1 and V.35 Interfaces -------------------------------------------------------------------------- V.35 Status Operation :[ Active Current test... -
Page 58: E1 Interface Status Menu
CT104 (RD): Report the type of information received for digital interface 10.7.4. E1 Interface Status Menu -------------------------------------------------------------------------- D A T A C O M [ 1 ] DM991C - G.SHDSL Modem - E1 and V.35 Interfaces -------------------------------------------------------------------------- E1 Status Operation :[ Active... -
Page 59: Bridge Interface Status Menu
Pressing ENTER, the information will be updated. The key "R" restarts the performance counters. -------------------------------------------------------------------------- D A T A C O M [ 1 ] DM991C - G.SHDSL Modem - E1 and V.35 Interfaces -------------------------------------------------------------------------- G.SHDSL Performance Code violations (CV) -
Page 60: Terminal Firmware Download
• DM991C 4W: 0229-03 – 06/19/06 - 18:44 • In other models, all versions have this feature. To download firmware versions that do not have this feature, contact DATACOM's technical support. Product Manual - DM991 Series V Family - 204.4092.08... -
Page 61: Remote Management
Using the local terminal with the management link of the G.shdsl aggregate, the equipment can manage a DM991S/SE or a DM991C/CE remote or it can be managed by a remote equipment (a DM991S/SE, a DM991CE or a DM705). DM991S/SE models can also be managed through the DATACOM management card for Telebrás sub racks, DMG20. -
Page 62: Tests
TESTS The tests in the DSL interface can be executed via management, through the keys in the frontal panel (LAL, LDL and LDR, only for DM991S/SE models), or through the CT140 (LDR) and CT141 (LAL) signals, coming from the digital interface. Remember that signals CT140 and CT141 should be set up as controlled in the digital interface, so that testing can be enabled. -
Page 63: Rdl Test
Figure 25. DM991 - BERT Test on G.shdsl Interface The BERT of DM991 modems is generated with exact rate of line (minimum 192Kbit/s), except the timeslot used for CAS, in which is sent mark (all bits equal 1). It is different of interfaces DM705 - DSL1/DSL2/DSL8 where BERT is sent in accordance with the number of channels configured for the interface (minimum 64kbit/s). -
Page 64: Digital Interface Tests
Figure 28. DM991 - LAL Test on E1 Interface 12.3. Digital Interface Tests 12.3.1. LDL Test This test helps the verification of the internal and external data link status. Two loopbacks are done. The internal loopback makes the data coming from the G.shdsl interface to be retransmitted. The external loopback makes the external data coming from the digital interface to return to it. -
Page 65: Converter Mode Tests
CONVERTER MODE TESTS The Converter Mode is only available on equipments DM991S and DM991C. Tests can be activated by the terminal/management, by CT141, or even by keys (only in DM991S). Remember that signal CT141 must be set up as controlled in the digital interface, so that testing can be enabled. -
Page 66: Figure 31. Ldl Test Converter Mode
Figure 31. LDL Test Converter Mode Product Manual - DM991 Series V Family - 204.4092.08... -
Page 67: Firmware Download
Normally, the Windows® HyperTerminal does not send files in a binary form, but in text form. Therefore it is recommended not to use the Windows® terminal to download software. DATACOM recommends the use of the TeraTerm, which is a freeware software and can be found in the following address: www.vector.co.jp/authors/VA002416/teraterm.html... -
Page 68: Installation And Operation
Before connecting any cable to the equipment, make sure that the grounding system is functional. To prevent risks of electric shock, before opening the DM991C/CE equipments, disconnect the power supply. The described equipment in this manual is sensible to the static electricity. Before handling any described equipment in this manual, verify if using devices of protection against static electricity, and if these are functioning correctly. -
Page 69: Accessory
The IN and OUT signals of the E1 interface are available for connection through the BNC (coaxial cable 75ohms) or through the RJ48 connector (twisted pair, 120ohms), in the back panel (for DM991C/CE). The pinout can be seen on Table 15. •... -
Page 70: G.704
G.703 - G.704 Here are described the structures defined by the G.704 recommendation. Note that a G.703 signal at 2048kbits/s with an according frame structure with the G.704 is also called E1 signal. 16.1. G.704 Frame structure The interface operates at a nominal speed of 2048kbit/s, with bits grouped in frames. Each frame is made of 256bits, arranged in 32 timeslots, each of 8 bits. -
Page 71: Crc4 Multiframe
Bit number Alterned frames Frame containing the Frame Note 1 Frame alignment signal Alignment Signal Note 1 Note 2 Note 3 Note 4 Frame wthout FAS Notes: 1) Si – bit reserved for international use. Usually set to 1 except when CRC4 is used as will be seen. 2) Bit always set on 1. -
Page 72: Cas Multiframe (Channel Associated Signaling)
Bits 1 to 8 of timeslot 0 of each interface SMF Frame C1/Si 0/Si C2/Si 0/Si C3/Si 1/Si C4/Si 0/Si C1/Si 1/Si C2/Si 1/Si C3/Si E/Si C4/Si E/Si SMF indicates the sub-multiframe. This calculations are used for the CRC4 calculation. The Si bit is the international bit The A bit is used to indicate a remote alarm (active in 1). -
Page 73: Electrical Characteristics
bits 1 to 8 of timeslot 16 of each frame Frame # Ai-Di are the channel signaling bits. Channel numbers refer to phone channels. Timeslots 1 to 15 and 17 to 31 correspond to the phone channels 1 to 30. X0-X2 are the x bits of the G.704 regulation, usually set to 1. -
Page 74: Interface Electrical Characteristics For Coaxial Cable
NRZ Data 2048kbit/s Coding Coding HDB3 4 zeros sequence 4 zeros sequence Figure 34. HDB3 coding in the G.703 2048kbit/s Interface 16.2.1. G.703 Interface Electrical Characteristics for Coaxial Cable Speed: 2048kbit/s ± 50ppm Pulse format: rectangular Number of pairs in each transmission direction: 1 coaxial pair Nominal impedance: 75ohms resistive Pulse peak tensions: 2.37V ±... -
Page 75: Panel Leds
PANEL LEDS 17.1. DM991S/SE Modems Front Panel LEDs Status Behaviour ALIM Equipment on Turned on Recived data Turned on Receiving all 1 or all 0 Turned off Transmited data Turned on Transmiting all 1 or all 0 Turned off No carrier Turned off AIS reception Blinks twice a second (most of the time turned off) -
Page 76: Dm991C/Ce Modems Front Panel Leds
LDL: Activates LDL test, for the G.703 side as well as for the V.35 or V.36/V.11 side. • LDR: Generate LDR request. The DM991C/CE modems show the same operations, however they are enabled by software. 17.2. DM991C/CE Modems Front Panel LEDs Status... - Page 77 When interface V.35 is disabled, these LEDs will represent data from interface E1 or data from the Ethernet interface (only in DM991SE, if interface E1 is disabled). ⊥ Only for DM991CE. Ø In the 4W model this LED is replaced for 109A (line A) and 109B (line B) LEDs. The operation of LEDs remains the same.
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Page 78: Straps And Dip Switches Map
STRAPS AND DIP SWITCHES MAP 18.1. DM991S/SE Figure 35. DM991S/SE - Straps and DIPs map 18.2. DM991C/CE DM991C/CE models have different strap positions, depending on the PCI revision used. Product Manual - DM991 Series V Family - 204.4092.08... -
Page 79: Pci Rev. 03 Or Lesser
18.2.1. PCI rev. 03 or lesser Figure 36. DM991C/CE – Map of Straps (PCI rev. 03 ou inferior) * Optionally available on demand. Product Manual - DM991 Series V Family - 204.4092.08... -
Page 80: Pci Rev. 04 Or Higher
18.2.2. PCI rev. 04 or higher Figure 37. DM991C/CE – Map of Straps (PCI rev. 03 ou superior) * Optionally available on demand. Product Manual - DM991 Series V Family - 204.4092.08... -
Page 81: Technical Specifications
Relative humidity: up to 95% non-condensing. 19.2. Power 19.2.1. DM991S/SE Maximum modem power consumption is 5,5W. 19.2.2. DM991C/CE Maximum modem power consumption is 8W. 19.3. Power Input The installation of any electric equipment must be in accordance with the current law in the place where this equipment will be installed. -
Page 82: Dm991C/Ce
The equipment supports an 1A fuse, type T (delay), 250 V. If necessary, replace it only for another one of the same type and value. To prevent risks of electric shock, before opening the DM991C/CE equipments, disconnect the power supply. -
Page 83: Dimensions
16,6mm x 316,5mm (width x height x depth). The dimensions are according with figures 1 and 2 of the 225-540-780 regulation. 19.4.2. DM991C/CE The equipment is presented in a desktop with 195mm width, 200mm depth and 44mm height (without the rubber feet, 46mm with the rubber feet). -
Page 84: Applicable Standards
APPLICABLE STANDARDS • ITU-T G.703, G.704, G.706, G.736, G.823, G.991.2, G.994.1, K.21, V.35, V.36, V.11, V.24 and V.28. • Telebrás 225-100-706 in the part relating to the G.703 interface, clocks and alarms. SDT 225-540-784 e SDT 225-540-530 in the items contained in the technical requirements and procedures applicable to Anatel category I telecom product’s certification. -
Page 85: Annex I - Safety Warnings
Installation, adjustment or maintenance must be carried through only by qualified, trained and authorized people. To prevent risks of electric shock, before opening the DM991C/CE equipments, disconnect the power supply. Product Manual - DM991 Series V Family - 204.4092.08... - Page 86 The described equipment in this manual is sensible to the static electricity. Before handling any described equipment in this manual, verify if using devices of protection against static electricity, and if these are functioning correctly. Product Manual - DM991 Series V Family - 204.4092.08...
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Page 87: Anlage 2 - Sicherheitshinweise
Immer die Sicherheitshinweise während der Installation, dem Betrieb oder der Wartung dieser Anlage beachten. Installation, Einstellung und Wartung dürfen nur von geschultem, qualifiziertem und zugelassenem Personal durchgeführt werden. Um das Risiko von elektrischen Schlägen zu vermeiden, vor dem Öffnen DM991C/CE, trennen die Energiequelle. Product Manual - DM991 Series V Family - 204.4092.08... - Page 88 Die in diesem Handbuch beschriebenen Anlagen sind empfindlich gegen statische Elektrizität. Bevor irgendeine in diesem Handbuch beschriebene Vorrichtung berührt wird, sich vergewissern, dass Schutzvorrichtungen gegen statische Elektrizität getragen werden und dass sie korrekt funktionieren. Product Manual - DM991 Series V Family - 204.4092.08...
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