Xchange manual V1.01
Contents
1. G 703 mode E1 Clk Source Clock source of E1 Transmit signal Loop Transmit clock recovered from network receive signal Internal Transmit clock generated by an internal 2048Kbps crystal oscillator Nx64 Transmit clock derived from DCE port clock When connected to a clocked network both units should be configured to Loop clock When connected via a crossover cable one unit should Loop clock and the other source the clock Internally When the system master clock is one of the DCE devices the connected unit should set Clock source to Nx64 and the other unit to Loop clock In this instance Tx Clk Source and or Rx Clk Source will need to be set to external Impedance E1 Line Impedance 75 Ohm The normal Impedance for BNC connection 120 Ohm The normal Impedance for RJ45 connection Xchange Shortform User Manual 17 September 2002 Issue 1 01a Page 3 of 8 CRC4 Selects whether CRC4 information is generated in a G 704 multiframe Not Enabled applicable if running in transparent G 703 mode Disabled Tx Clk Source DCE interface Transmit clock source Internal Clock is derived from E1 Receive clock External Clock is provided by external device If this external device is generating the clock rather than looping its received clock the E1 Clk Source must be set to Nx64 Rx Clk Source DCE interface Receive clock source Internal Clock is derived from E1 Receive clock External Clock is provid2. Ports DC Power To DTE The above named ports are classified as SELV Safety Extra Low Voltage in accordance with clause 2 3 of EN60950 BS7002 IEC950 as applicable and must only be connected to equipment which similarly complies with the SELV safety classification The DC power port must only be connected to the supplied power module TNV Ports Euro 120 Ohm RJ45 75 Ohm BNC The above named ports are classified as TNV Telecom Network Voltage in accordance with clause 6 of EN60950 BS7002 IEC950 as applicable and must only be connected to equipment that similarly complies with the TNV safety classification Xchange User Issue 1 01a 1 8 Si Jumper Settings The following jumpers are used to select the E1 and Nx64 interface types of the unit LK1 Bank of 4 Jumpers Select V 11 or V 35 signal levels When V 35 is selected the V 35 stub adapter cable should be used J5 Fit to connect E1 Tx signal to BNC J6 These jumpers should only be fitted if the E1 service is to be run over BNC cabling J8 Fit to connect E1 Rx signal to BNC J10 These jumpers should only be fitted if the E1 service is to be run over BNC cabling J7 Fit to Earth outer conductor of Tx BNC These jumpers should only be fitted if the E1 service is to be run over BNC cabling J9 Fit to Earth outer conductor of Rx BNC These jumpers should only be fitted if the E1 service is to be run over BNC cabling Dipswitch 2 When set On the
3. unit may not be configured from the front panel display and buttons The initial splash screen when the unit is turned on will also state Locked This can be used after initial configuration to prevent unauthorised changes Please note debug options may still be selected even when this switch is set Dipswitch 1 Reserved Should be left in the Off position Incorrect earthing will cause problems The Tx and Rx cables should only be earthed at one end It is recommended that the Tx only at each end of the link be earthed LCD contrast pot LK1 J5 J6 J7 i i J8 J9 J10 Dipswitch 1 2 Xchange Shortform User Manual Issue 1 01a Page 2 of 8 17 September 2002 Configuration Four buttons are provided for configuration Up a Down w Ok 4 Cancel x Up and Down move between configuration items or alter a configuration item if it is selected Ok selects a configuration item or confirms changes Cancel quits out of a configuration item discarding any changes When modifying the timeslot allocations Up and Down move between timeslots Ok toggles the timeslot as enabled or not Cancel brings up a second display requesting confirmation of changes Please note that the diagnostics settings do not get stored in Non volatile memory and will always revert to disabled on power up Top Level Configuration items Not user alterable Sync State Reports the Synchronisation state of the E1 Interface No Signal DC level on r
4. V 11 Input 2 103 TXD B V 11 Input 9 Input flag can be configured to be any V 28 input to DCE i e Request to Send RTS 105 Output flags can be configured to be any V 28 outputs from DCE i e Clear to Send CTS 106 Data Set Ready DSR 107 or Data Carrier Detect DCD 109 Xchange Shortform User Manual 17 September 2002 Issue 1 01a Page 7 of 8 Suggested V 35 Stub cable 15 way D type Name Type MRAC 34 pin Female connector Male 1 Protective Shield Ground 8 Signal Ground Bidirectional B 15 RTS Flag 3 I P V 28 Input C 7 ExtClk A V 11 Input U 14 ExtClk B V 11 Input W 6 RXCIk A V 11 Output V 13 RXCIk B V 11 Output X 5 TXCIk A V 11 Output Y 12 TXCIk B V 11 Output AA 4 RX A V 11 Output R 11 RX B V 11 Output T 3 CTS Flag 1 O P V 28 Output D 10 DSR Flag 2 O P V 28 Output E amp F 2 TXD A V 11 Input P 9 TXD B V 11 Input S Xchange Shortform User Manual Issue 1 01a Page 8 of 8 17 September 2002
5. X change interface adapter Introduction Xchange is an interface adapter that will convert between a G 703 G 704 link and an X 21 V 11 or V 35 interface configured with internal jumpers The Xchange can operate at DCE rates between 64Kbps and 2048Kbps in 64k steps and may be assigned to non contiguous timeslots on a G 704 link An external clock input is provided on the DCE port to enable the Xchange to be clocked from the connected DTE Configuration is achieved simply using the buttons and LCD display on the front panel Configuration is Non Volatile and will be retained in the event of power failure Approvals Certified compliant in the EC when fitted in accordance with the installation instructions against the following directives standards Low Voltage Directive 73 23 EEC and amendment 93 68 EEC EN60950 1992 A5 1998 Safety Electromagnetic Compatibility directive 89 336 EEC and subsequent amendments to date EN300386 2000 03 V1 2 1 Telecommunications Terminal Equipment directive 91 263 EEC and amendment 93 68 EEC CTR 12 13 PD7024 Warnings This equipment must be earthed grounded via the screen of the DTE lead This equipment relies on the earth ground connection for EMC compliance It must not under any circumstances be operated without an earth connection which could nullify its approval The equipment allows connection only of suitably approved equipment to its ports the safety status of which are defined below SELV
6. eceive Clock Only No framing detected G 703 Framed Framing detected No valid multiframe information Non CRC4 mode Multiframe Multiframe detected Transmit Signal Detected condition of E1 Transmit signal Open Circuit No load on Transmit Cable fault Normal Normal load on Transmit Short Circuit Short circuit on Transmit Cable fault Receive Signal Level of E1 received signal Ranges from Low Loss better than 2 5dB to No signal less than 37 5dB in 2 5dB steps Data Rate Data rate of the X 21 V 35 port as configured under Timeslot Interface Data port interface selected Via internal jumpers X 21 X 21 V 11 signal levels selected V 35 V 35 signal levels selected Use with V 35 stub adapter cable Control Status of X 21 Control lead Not available if V 35 interface is selected On Signal is asserted Off Signal is not asserted Flag 3 Status of V 35 Flag 3 lead Not available if X 21 interface is selected On Signal is asserted Off Signal is not asserted BPV error rate Running average of Bipolar Violation errors over a one minute period CRC error rate Running average of CRC errors over a one minute period FEBE error rate Running average of FEBE errors over a one minute period Config Provides entry to config level Configuration items Config Level Configuration items Timeslot Enable or Disable individual timeslots Enabling timeslot 0 forces Transparent
7. ed by external device If this external device is generating the clock rather than looping its received clock the E1 Clk Source must be set to Nx64 Tx Clk Edge Sets which edge of Tx Clock is used to clock in data This should be left as Normal Normal unless cable length delays are causing the clock to become inverted Inverse with respect to the data Indicate Lead Determines source of X 21 Indicate lead Not available if V 35 interface is selected On Signal is always asserted Off Signal is never asserted Follow Ctrl Signal is the same state as the Control signal Carrier Signal is asserted only if the E1 interface is considered Synchronised Flag 1 Determines source of V 35 Flag 1 lead Not available if X 21 interface is selected On Signal is always asserted Off Signal is never asserted Follow Flag 3 Signal is the same state as the Flag 3 signal Carrier Signal is asserted only if the E1 interface is considered Synchronised Flag 2 Determines source of V 35 Flag 2 lead Not available if X 21 interface is selected On Signal is always asserted Off Signal is never asserted Follow Flag 3 Signal is the same state as the Flag 3 signal Carrier Signal is asserted only if the E1 interface is considered Synchronised Carrier Alarm Determines whether loss of Synchronisation on the E1 interface creates an Enabled alarm condition Disabled Data Alarm Determines whether the Control signal X 21 or Fla
8. en enabled a standard PRBS pseudo random bit sequence is enable generated as a G 703 2Mbps bitstream and sent to the remote This PRBS is disable searched for in the received bitstream The real time results are displayed on the BERT configuration screen in the bottom right corner showing a letter S if synchronised to an incoming PRBS and a 4 digit Hex number displaying the number of bit errors counted This will saturate at FFFF Please note that the PRBS is sent as an unframed G 703 bitstream and so will not work through a framed network Local loop x lt Network Loop Remote loop Xchange Shortform User Manual 17 September 2002 Issue 1 01a Page 5 of 8 Status LEDs The Blue Status LED illuminates when the unit is synchronised and has no alarm condition If the unit is not synchronised the Blue LED will flash If an alarm condition occurs the Red LED will illuminate If any of the diagnostics options are enabled the Amber LED will illuminate G 703 Interface Pinouts Composite Interface Connections Europe Using 120 Ohm Balanced RJ45 Name Description Type at DTE RJ45 Female Connector RxA RX Pair Input 1 RxB RX Pair Input 2 TxA TX Pair Output 4 TxB TX Pair Output 5 S1 Shield Reference 3 S2 Shield Reference 6 Composite Interface Connections UK Using 75 Ohm Un Balanced BNC Name Descriptio
9. g 3 signal V 35 being Enabled disasserted creates an alarm condition Disabled Backlight Determines behaviour of LCD Backlight Timed Backlight turns on when a key is pressed and off 30 seconds after the last On key is pressed Off Backlight is always on Backlight is never on Elink1 mode When enabled the Xchange acts as a master to an Elink 1 putting Elink 1 Enabled configuration information in timeslot 31 if unused Only contiguous timeslot Disabled allocation will be allowed when enabled Diagnostics Provides entry to Diagnostics level Configuration items Factory default setting Xchange Shortform User Manual 17 September 2002 Issue 1 01a Page 4 of 8 Diagnostics Level Configuration Items Local Loop enable disable When enabled the E1 Transmit signal will be looped to the E1 Receive signal Network Loop enable disable When enabled the E1 Receive signal will be looped to the E1 Transmit signal Remote Loop enable When Enabled the standard Loop up code repeating 10000 will be sent to the remote for 10 seconds disable When Disabled the standard Loop down code repeating 100 will be sent to the remote for 10 seconds When receiving either of these codes for gt 5 seconds a unit will enter or leave Network Loop mode as appropriate Please note that these codes are sent as an unframed G 703 2Mbps bitstream and so will not work through a framed network G 703 Bert Wh
10. n Type at DTE BNC Connector Female RxA Input Centre RX RxB RX Pair Ground Outer RX Reference TxA Output Centre TX TxB TX Pair Ground Outer TX Reference Xchange Shortform User Manual Issue 1 01a Page 6 of 8 17 September 2002 X 21 V 11 DCE Pinout 15 Way D Type Female configured as DCE Only applicable when LK1 is set to V 11 position Data Channel Connections Name Description Type at DCE DB15 Connector Female Protective i 1 Ground G Signal Ground 8 T A TxDa Input 2 T B TxDb Input 9 R A RxDa Output 4 R B RxDb Output 11 S A Clock a Output 6 S B Clock b Output 13 I A Indicate a Output 5 I B Indicate b Output 12 C A Control a Input 3 C B Control b Input 10 X A Ext Clock a Input 7 X B Ext Clock b Input 14 V 35 DCE Pinout 15 Way D Type Female configured as DCE Only applicable when LK1 is set to V 35 position Data Channel Connections Number Name Type at DCE DB15 Female Connector Protective 1 Ground 102 Signal Ground Bidirectional 8 Flag 3 I P V 28 Input 15 113 ExtCIk A V 11 input 7 113 ExtClk B V 11 input 14 115 RXCIk A V 11 Output 6 115 RXCIk B V 11 Output 13 114 TXCIk A V 11 Output 5 114 TXCIk B V 11 Output 12 104 RX A V 11 Output 4 104 RX B V 11 Output 11 ie Flag 1 O P V 28 Outout 3 i Flag 2 O P V 28 Output 10 103 TXD A
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