EIA530, RS232, V.35 Interface For OM200 SONET-OC3 Multiplexer

Transcription

1 OM00- / (serial data) EIA0, RS, V. Interface For OM00 SONET-OC Multiplexer Chassis Chassis sizes of,,, and 1 slot. Optical data rate of 1Mbps Single or multimode fiber versions Point-to-point topology Add/drop topology Fiber protection ring switching Interfaces Telephony Subscriber Loop & CO Digital - MC00 Digital M0/ T1 or E1 Data EIA0, RS, V. RS/RS - Add/Drop RS RS Ethernet Audio Analog -wire Analog -wire E&M Radio - Harris RF00H Other Contact sense/closure Alarm - chassis monitor Radar - video Optical SONET General Every chassis requires at least one Optical SONET card and one Interface card. Full details can be found at: WALGREEN ROAD, OTTAWA, ONTAO, K0A 1L0 Telephone (1) 1- Fax (1) 1-1

2 OM00- / (serial data) Interface: OM00-/ (serial data) Description This serial data modem transmits and receives data, two clocks, and all handshake lines over a pair of optical fibers. It is data rate transparent to any data rate within its operating range. The interface can be configured to EIA-0, EIA-0A, RS-, or V.. Synchronous or asynchronous data can be transmitted. There are two versions of the modem. The OM00- connects to Data Terminal Equipment such as a computer. It has an on board bit rate generator which can output standard clock frequencies. The OM00- connects to Data Communication Equipment such as a modem. The OM00- and OM00- are often used as a pair, in which case the modems simulate a straight through cable connection; however an OM00- to OM00-, or OM00- to OM00- configuration is also valid. Indicators ALARM: ON indicates the modem is in local or remote loopback test mode, or the card has lost synchronization (because of a missing optical fiber), or a card malfunction. Try re-seating the card if a card malfunction is suspected; if this does not clear the alarm or if the problem reoccurs, the card is faulty. DATA-IN: ON indicates electrical data is being input to the OM00. This LED is activated by transitions; it is off for a steady state input. -IN: For the OM00-, ON indicates a clock is being input pin /(). For the OM00-, ON indicates a clock is being input pin /(). This LED is activated by transitions; it is off for a steady state input. FLASHING indicates data/clock phase problem. See Indicators For Clock Phasing Problems section. DATA-OUT: ON indicates the OM00 is electrically outputting data received from the remote modem. This LED is activated by transitions; it is off for a steady state output. -OUT: For the OM00-, ON indicates a clock is being output pin /(). For the OM00-, ON indicates a clock is being output pin (). FLASHING indicates data/clock phase problem. See figure on next page. This LED is activated by transitions; it is off for a steady state output. Once the OM00 starts outputting a clock, it will continue outputting that clock frequency even when the remote source clock is removed; the reason for this is to prevent cryptos from losing their key when the clock is lost. WALGREEN ROAD, OTTAWA, ONTAO, K0A 1L0 Telephone (1) 1- Fax (1) 1-

3 Management Port Settings for the OM00-: OM00- / (serial data) The Network Management Interface is used to configure this interface with the following options. Note that TC is sometimes referred to as in the diagrams. 1 Set loopback test mode 1 Disable loopback disables both local and remote loopbacks. Enable local loopback tests the cable and the local interface. Activation causes the following: The transmitted data is locally looped back to the receive data pins. The clock (pins /) is looped back to the (pins /). The received data at the remote modem is put into the idle state. At the remote modem on a interface is low. At the remote modem on a interface is low. All clocks pass across the link and are output normally. The CLK-IN indicator at both the local and remote end has a slow flash. Enable remote loopback tests the full data path except for the I/O interface at the remote end. Activation causes the following: The transmitted data is passed to the remote modem where it is retransmitted back to the originating modem. The clock (pins /) travels to the remote end where it retransmitted from the far end back to the (/). The TC input (1/1) is unaffected and is transmitted across the link. At the remote end the data being input is looped back to the output data pins; this feature is for testing cryptos. All clocks pass across the link and are output normally. At the remote modem on a interface, is low. At the remote modem on a interface is low. The TEST pin goes high on the local interface as well as the remote end if it is a interface. Once activated, the CLK-IN indicator at both the local and remote end has a slow flash as a reminder that the port is in test mode. Set loopback pin mode 1 Enable loopback pins allows pin 1 to cause a local loopback, and pin 1 to cause a remote loopback. Disable loopback pins when the attached equipment does not drive pin 1/1. This prevents inadvertent crosstalk in the cable from causing problems. Set handshake line mode 1 Enable handshake lines allows control signals,,,, and to be passed across the optical link as shown in diagrams. Force handshake lines high causes local and remote control signals,,,, and to be high. WALGREEN ROAD, OTTAWA, ONTAO, K0A 1L0 Telephone (1) 1- Fax (1) 1-

4 OM00- / (serial data) Set clock edge 1 Clock with falling edge (standard) The attached equipment clocks in Transmit Data from the OM00- on the falling edge of clock pin ; therefore the OM00- outputs on the rising edge. Clock with rising edge (non-standard) The OM00- outputs on the falling edge of clock. Set interface type This option selects the interface drivers and receivers. The local and remote OM00s can have different interfaces. 1 Select EIA-0 Select EIA-0A Select V. Select RS- Set Maximum Data Rate The following selection determines how much of the optical SONET bandwidth the card uses. The lowest bandwidth which satisfies the required serial data rate should be selected. See the specification section for details on percentage of overall bandwidth used. Synchronous in the following selections applies to systems where the clock is present, Asynchronous in the following selections applies to systems where no clocks are used in transmission. 1 Select <00 kbps synchronous, < 0 kbps asynchronous Select <1.1 Mbps synchronous, <0 kbps asynchronous Select <. Mbps synchronous, <0 kbps asynchronous Select < Mbps synchronous, <00 kbps asynchronous Select < Mbps synchronous, <1.1 Mbps asynchronous Set clock configuration 1 Synchronous data (TC output is remote TC) TC (pins 1/1) outputs the TC which is input at the remote OM00-. Synchronous data (TC output is remote ) Sometimes only one clock is passed across the link. This Slave setting causes the clock which is being input at the remote to be output TC and ; as well it is passed back across the link (SLAVE MODE). Synchronous data (TC output is internal baud clock) In this mode the Set TC baud clock rate option must be set appropriately. Asynchronous data (no clocks in system) Select when only data is passed across the link. WALGREEN ROAD, OTTAWA, ONTAO, K0A 1L0 Telephone (1) 1- Fax (1) 1-

5 OM00- / (serial data) Set TC baud clock rate This selection controls the output from the TC pins 1/1 on the OM00- connector. Note that the OM00-/ transmits at any rate from DC to M bps; these bit rates are used if an internally generated clock is desired. Be sure Set Maximum Data Rate is set to allow sufficient bandwidth. 1 No clock. Kbps 1. Kbps. Kbps Kbps Kbps Kbps 1 Kbps Kbps a Kbps b 1 Kbps c Kbps d 1. Mbps e.0 Mbps f.1 Mbps g Mbps h.1 Mbps i Mbps j Mbps Management Port Settings for the OM00-: The Network Management Interface configures the following options. 1 Set loopback test mode 1 Disable loopback disables both local and remote loopbacks. Enable local loopback tests the cable and the local interface. Activation causes the following: `The transmitted data is locally looped back to the receive data pins. The (/) is looped back to the (/). The received data at the remote modem is put into the idle state. At the remote modem on a interface is low. At the remote modem on a interface is low. All clocks pass across the link and are output normally. The CLK-IN indicator at both the local and remote end has a slow flash. Enable remote loopback tests the full data path except for the I/O interface at the remote end. Activation causes the following: The transmitted data is passed to the remote modem where it is retransmitted back to the originating modem. The (pins /) is retransmitted from the far end back to the (pins /) The TC input (1/1) is unaffected and is transmitted across the link. At the remote end the data being input is looped back to the output data pins; this feature is for testing cryptos. All clocks pass across the link and are output normally. At the remote modem on a interface, is low. At the remote modem on a interface is low, and TEST is put high. Once activated, the CLK-IN indicator at both the local and remote end has a slow flash as a reminder that the port is in test mode WALGREEN ROAD, OTTAWA, ONTAO, K0A 1L0 Telephone (1) 1- Fax (1) 1-

6 OM00- / (serial data) Set loopback pin mode 1 Enable pass on loopback causes a received remote loopback command to put the B output (pin 1) high instead of causing a loopback of the data. This setting passes on the loopback command, so the attached equipment will go into loopback. Disable pass on loopback allows a received remote loopback command to cause a remote loopback of the data. Set handshake line mode 1 Enable handshake lines allows control signals,,,, and to be passed across the optical link as shown in diagrams. Force handshake lines high causes local and remote control signals,,,, and to be high. Set retime with TC mode 1 Enable retiming of with TC fixes a very common timing error. When equipment attached to the OM00- supplies a TC (pin 1), it expects to capture the response T Data on the falling edge of TC. If the T Data response is delayed excessively, the clock/data phasing will be wrong. Refer to the following figure. The equipment on the right supplies the clock at A. The clock arrives delayed at B because of fiber delays. The is transmitted at C based on clock B. The data s arrival at D is again delayed by the propagation time of the fiber. The equipment tries to clock the in with clock A; however, since the has been delayed by some amount the data/clock phase likely is not correct; therefore errors occur. Notice that the clock on the user's equipment on the right is ignored. To correct this problem, enable the Retime function on the OM00-; this will adjust the phase so it aligns properly with the TC. (Note that if TC at A is not available the RETIME will be clocked by.) Disable retiming of with TC Output data from the is not retimed. A Common Clock Phasing Problem OUT CLK C 1 RETIME 1 D IN CLK IS IGNORED BY EQUIP. ON GHT! 1 1 OUT CLK B 1 TC TC A SELECTED USER'S EQUIPMENT OM00- OM00- USER'S CONTRA-DIRECTIONAL TIMING EQUIPMENT WALGREEN ROAD, OTTAWA, ONTAO, K0A 1L0 Telephone (1) 1- Fax (1) 1-

7 OM00- / (serial data) Set interface type This option selects the interface drivers and receivers. The local and remote OM00s can have different interfaces. 1 Select EIA-0 Select EIA-0A Select V. Select RS- Set Maximum Data Rate The following selection determines how much of the optical SONET bandwidth the card uses. The lowest bandwidth which satisfies the required serial data rate should be selected. See the specification section for details on percentage of overall bandwidth used. Synchronous in the following selections applies to systems where the clock is present, Asynchronous in the following selections applies to systems where no clocks are used in transmission. 1 Select <00 kbps synchronous, < 0 kbps asynchronous Select <1.1 Mbps synchronous, <0 kbps asynchronous Select <. Mbps synchronous, <0 kbps asynchronous Select < Mbps synchronous, <00 kbps asynchronous Select < Mbps synchronous, <1.1 Mbps asynchronous Set clock configuration 1 Synchronous data Asynchronous data (no clocks in system) WALGREEN ROAD, OTTAWA, ONTAO, K0A 1L0 Telephone (1) 1- Fax (1) 1-

8 OM00- / (serial data) Possible Clock Configurations 1 /1 OM00- CONNECTION OM00- /1 Clock Mode 1 ETERNAY SUPPLIED S / 1/1 TC /1 STCE / TC 1/1 /1 / / /1 OM00- OM00- /1 Clock Mode SUPPLIES T / 1/1 TC STCE TC / 1/1 /1 /1 / / OM00- OM00- Clock Mode TC IS SLAVED TO /1 / 1/1 TC STCE TC /1 / 1/1 /1 /1 / / /1 OM00- OM00- /1 / STCE STCE / 1/1 TC TC 1/1 /1 /1 / / /1 OM00- OM00- /1 Clock Mode 1 OR Clock Mode WITH "NO " / 1/1 TC /1 TC / 1/1 /1 Clock Mode 1 OR Clock Mode WITH "NO " / / /1 OM00- OM00- /1 Clock Mode SUPPLIES T / 1/1 TC TC / 1/1 Clock Mode SUPPLIES T /1 /1 / / WALGREEN ROAD, OTTAWA, ONTAO, K0A 1L0 Telephone (1) 1- Fax (1) 1-

9 OM00- / (serial data) /1 OM00- OM00- /1 Clock Mode 1 OR Clock Mode WITH "NO " / 1/1 TC /1 TC / 1/1 /1 Clock Mode / / OM00- OM00- /1 /1 / / Clock Mode Clock Mode TC IS SLAVED TO 1/1 TC TC 1/1 /1 /1 / / /1 OM00- OM00- /1 Clock Mode TC IS SLAVED TO / 1/1 TC TC / 1/1 Clock Mode SUPPLIES T /1 /1 / / If / is not detected, the TC clock will automatically be sent across the link; otherwise the clock is transmitted. Configuration has an OM00- outputting a bit rate clock at each end. These clocks do not have to be the same frequency. Once the OM00 starts outputting a clock, it will continue outputting that clock frequency even when the remote source clock is removed; the reason for this is to prevent cryptos from losing their key when the clock is lost. Clocks During Loopback or / 1/1 LOCK T OUTPUTS ARE UNAFFECTED BY / T or / 1/1 LOCK T OUTPUTS ARE UNAFFECTED BY / T WALGREEN ROAD, OTTAWA, ONTAO, K0A 1L0 Telephone (1) 1- Fax (1) 1-

10 OM00- / (serial data) Input/Output Pin Names Pin Name Interface Interface Function IN OUT Transmit Data: IN OUT Serial Clock Timing Element: This clock is synchronous with. IN OUT Data Terminal Ready: Normally high during transmission. IN OUT Request To Send: Normally high during transmission. IN OUT Local Loopback: A high causes the OM00- to go into local loopback. Always a low output on the OM00-. Used for testing purposes. IN OUT Remote Loopback: A high on the OM00- causes the remote OM00 to send its received data and clock back. Used for testing purposes. OUT IN Receive Data: OUT IN Receive Clock: This clock is synchronous with. OUT IN Clear To Send: Normally high during transmission. OUT IN Data Carrier Detect: Normally high during transmission. OUT IN Data Set Ready: Normally high during transmission. OUT IN Ring Indicator: High during a ringing condition. (TC)* OUT IN Send Clock: If used, causes the equipment attached to the OM00- to output data on the rising edge of this clock. OUT IN Test Mode: High during Remote or Local Loopback. OUT IN Signal Ground: * This signal is known by a variety of names. DB- Pin Assignments OM00- FEMALE OM00- MALE WALGREEN ROAD, OTTAWA, ONTAO, K0A 1L0 Telephone (1) 1- Fax (1) 1-

11 OM00- / (serial data) System Configurations The OM00 modems will work with different interfaces at each end. For instance, one end may be configured as EIA-0 and the other as RS-. The most common configuration is an OM00- connected to an OM00- which simulates a straight through cable. RS- to 0 MODE IS SENT DATA OR PASS IT ON 1 SLAVE 1 1 RS- to 0 MODE IS SENT MODE IS SENT REMOTE REMOTE 1 SLAVE SLAVE 1 1 (Send Clock) is sometimes referred to as TC (Transmit Clock). WALGREEN ROAD, OTTAWA, ONTAO, K0A 1L0 Telephone (1) 1- Fax (1) 1-

12 OM00- / (serial data) RS- to EIA-0A to 1 0 MODE IS SENT DATA OR PASS IT ON SLAVE 1 1 (Send Clock) is sometimes referred to as TC (Transmit Clock). WALGREEN ROAD, OTTAWA, ONTAO, K0A 1L0 Telephone (1) 1- Fax (1) 1-1

13 OM00- / (serial data) EIA-0A to 1 0 MODE IS SENT MODE IS SENT REMOTE REMOTE SLAVE SLAVE 1 1 EIA-0A to (Send Clock) is sometimes referred to as TC (Transmit Clock). WALGREEN ROAD, OTTAWA, ONTAO, K0A 1L0 Telephone (1) 1- Fax (1) 1-1

14 OM00- / (serial data) EIA-0 to MODE IS SENT DATA OR PASS IT ON EIA-0 is similar to EIA-0A except and are balanced and is not present. EIA-0 to MODE IS SENT MODE IS SENT REMOTE REMOTE (Send Clock) is sometimes referred to as TC (Transmit Clock) WALGREEN ROAD, OTTAWA, ONTAO, K0A 1L0 Telephone (1) 1- Fax (1) 1-1

15 OM00- / (serial data) V. to 1 0 MODE IS SENT DATA OR PASS IT ON SLAVE 1 1 V. to is not shown. See the EIA0A to figure to see how the signals are passed across the link. EIA-0 to is not shown. See the EIA0A to figure to see how the signals External Cables For RS- signals, a straight through AWG or larger cable should be acceptable; it is not necessary to use twisted pair cable for RS-. An overall braid helps minimize RF radiation of the signals. For balanced signals, the +/- phases of the balanced inputs/outputs must share the same twisted pair conductor; otherwise cross talk will interfere with transmission. Unbalanced lines can share a twisted pair conductor with an unrelated unbalanced line. An external overall shield is recommended to minimize RF radiation; this shield is normally connected to pin 1 (chassis ground) of the OM00 DB connector. A typical cable is AWG with 0 to Ohms characteristic impedance. Technically speaking when only balanced data and clock lines are used, the signal ground is not necessary; however it should be connected to minimize RF radiation. Stranded rather than solid conductors are more flexible and reliable. WALGREEN ROAD, OTTAWA, ONTAO, K0A 1L0 Telephone (1) 1- Fax (1) 1-1

16 OM00- / (serial data) Specifications General System bandwidth used by this card Data rate < 0 kbps synchronous or < kbps asynchronous % Data rate < 1. Mbps synchronous or < kbps asynchronous % Data rate <. Mbps synchronous or <0 kbps asynchronous.....1% Data rate < Mbps synchronous or <00 kbps asynchronous.....% Data rate < Mbps synchronous or < 1 Mbps asynchronous....% Current used by this card... < 0. A Power consumption... < 1. W Operating temperature... -0C to +0C Interface Data I/O connector OM DBS (female) OM DBP (male) I/O Interface (software programmable)... EIA0, EIA0A, RS, V. Data Rate for RS-... DC to 0 kbps Data Rate for EIA-0/A and V.... DC to Mbps Bit rate clock on OM00- kbps...., 1.,.,,,, 1,,,1,, 1, 0, 1, 000,, 000, 000 Ordering Information Part number OM00- OM00- WALGREEN ROAD, OTTAWA, ONTAO, K0A 1L0 Telephone (1) 1- Fax (1) 1-1