Communication Ports

4.3.1 DCC (Data Communication Channel)

The CityLink DCC (Data Communication Channel) is used to communicate between the Supervisory Unit of the Network Element and Supervisory Units of other Network Elements through the SOH of the STM-1 traffic.

There are two DCC ports. DCC Line at the line side and DCC Radio at the radio side. The DCC Radio is always enabled. Nera Stack will always be enabled at DCC Radio.

The Communication Ports configuration sheet can be opened from the Configuration context menu of the Equipment node in the Explorer view.

Press the DCC tab to view/change the DCC settings. The sheet can also be invoked by selecting (highlighting) the Equipment node in the Explor-er view and then selecting Edit Communication Ports from the Configuration menu.

Fields: Choices: Description:

Figure VII-27 DCC Tab in Communication Ports Configuration Sheet

Enabled Switches the DCC communication ports on/off.

Channel: The Channel where the DCC are

inserted in the SOH.

Ch. 1-Ch XX CityLink has only one channel. This field will always be ‘Ch. 1’ at CityLink.

Direction

Line DCC Line is inserted the line side of the radio.

Radio DCC Radio is inserted the radio side of the radio.

Timeslot: Shows which timeslot in the SOH the DCC channels use. The user can change the used timeslot by pressing SOH. The SDH Frame Section Overhead Dialog box will appear.

Stack

Nera NERA Stack.

Nera stack is always enabled on the radio side (DCC Radio).

QECC QECC Stack

TCP/IP TCP/IP Stack

LAPD Data link layer for the QECC protocol.

For more information refer to ITU-T G.784 and ITU-T Q.921.

Network side Server for the LAPD requests.

User side Client for the LAPD requests.

PPP: (Point to Point Protocol) Data link

layer for the TCP/IP protocol.

(currently not implemented) Active mode (currently not implemented) Demand dial (currently not implemented) Direct mode (currently not implemented) Passive mode (currently not implemented)

4.3.2 NI (Network Interface)

The CityLink NI (Network Interface) ports (NI-1 and NI-2) are used to connect the Supervisory Unit of the Network Element to Supervisory Units of other Network Elements. The NI ports on the front panel of the CityLink IDU are used to connect the Network Elements. The NI ports can be set to a variety of different configurations.

The NI 2 port, in the CityLink Radio, can be Enabled only if the Ethernet function is Disabled, and vice versa.

The Communication Ports configuration sheet can be opened from the Configuration context menu of the Equipment node in the Explorer view.

Press the NI tab to view/change the NI settings. The sheet can also be invoked by selecting (highlighting) the Equipment node in the Explorer view and then selecting Edit Communication Ports from the Config-uration menu.

Figure VII-28 NI Tab in Communication Ports Configuration Sheet

Fields: Choices: Description:

Enabled Enables the NI port

Function CityLink The functionality of the NI port.

NL29x NI The baud rate and stack are NL29x Qx grayed/whitened to indicate which PDH Synchronous settings are necessary for the PDH Asynchronous different functionalities.

V.11 contra dir master V.11 contra dir slave V.11 co dir

Q1 V.11

NL29x V.11 contra dir slave

Baudrate The baud rate (symbols pr. second) of the NI port. If the field is grayed, no baud rate is necessary to set.

1200 to 200000 Baud Stack

Nera NERA Stack.

OSI OSI Stack

LAPD Data link layer for the QECC

protocol. For more information refer to ITU-T G.784 and ITU-T Q.921.

Network side Server for the LAPD requests.

User side Client for the LAPD requests.

PPP: (Point to Point Protocol) Data link

layer for the TCP/IP protocol.

(currently not implemented) Active mode (currently not implemented) Demand dial (currently not implemented) Direct mode (currently not implemented) Passive mode (currently not implemented)

Fields: Choices: Description:

4.3.3 LCT

The LCT port is the serial port (RS-232) that can be used to communicate with a PC executing NEW-NMS. In this sheet the baud rate of the LCT port can be changed.

WARNING!

If you are communicating with the NE through the LCT (Serial) port and you change the LCT baud rate you will loose contact with the NE until you configure the NEW-NMS communication settings to the same baud rate as the NE baud rate.

The Communication Ports configuration sheet can be opened from the Configuration context menu of the Equipment node in the Explorer view.

Press the LCT tab to view/change the LCT settings. The sheet can also be invoked by selecting (highlighting) the Equipment node in the Explorer view and then selecting Edit Communication Ports from the Config-uration menu.

Figure VII-29 LCT Tab in Communication Ports Configuration Sheet

4.3.4 Ethernet

In the CityLink Radio the Ethernet port can be Enabled only if the NI 2 port is Disabled, and vice versa. See chapter 4.3.2.

The Communication Ports configuration sheet can be opened from the Configuration context menu of the Equipment node in the Explorer view.

Press the Ethernet tab to view/change the Ethernet settings. The sheet can also be invoked by selecting (highlighting) the Equipment node in the Explorer view and then selecting Edit Communication Ports from the Configuration menu.

Fields: Choices: Description:

Enabled Toggles Ethernet on/off

Stack OSI TP4 OSI Stack

TCP/IP TCP/IP Stack. Must be selected if IP Tunneling is enabled.

Figure VII-30 Ethernet Tab in Communication Ports Configuration Sheet

4.3.5 IP Settings

The IP Settings sheet lets you view the IP address of the NE and configure the subnet mask and default gateway. The IP address can be set in the Element Id property sheet.

Fields: Description:

IP address Shows the Internet Protocol (IP) address of the NE.

Subnet mask Type the Subnet Mask number obtained from your network administrator. This number, combined with the IP address, identifies which network your NE is on.

Default gateway For each adapter, type the correct IP address of the default gateway used for forwarding packets to other networks or subnets. This address should be provided by the network administrator and is required for nodes Figure VII-31 IP Settings Tab in Communication Ports Configuration Sheet The Communication Ports configuration sheet can be opened from the Configuration context menu of the Equipment node in the Explorer view.

Press the IP Settings tab to view/change the NI settings. The sheet can also be invoked by selecting (highlighting) the Equipment node in the Explorer view and then selecting Edit Communication Ports from the Configuration menu.

4.3.6 IP Tunneling

A connection can be set up between two NEs through another network, using the Internet Protocol. This is called IP Tunneling. Two connections, IP Tunnel 1 and IP Tunnel 2, can be configured. Ethernet must be enabled with TCP/IP Stack in order to use IP tunnels. Internet Protocol (IP)-address, Section address and NE address are used for set up of IP tunnels to other NEs. The IP tunnel must only be set up at one side of the tunnel.

The Communication Ports configuration sheet can be opened from the Configuration context menu of the Equipment node in the Explorer view.

Press the IP Tunneling tab to view/change the IP Tunneling settings. The sheet can also be invoked by selecting (highlighting) the Equipment node in the Explorer view and then selecting Edit Communication Ports from the Configuration menu.

Fields: Choices: Description:

Enabled On/Off Toggles IP Tunneling on/off.

Remote section address The section address of the NE addressed through the IP tunnel.

Remote NE address The NE address of the NE addressed through the IP tunnel.

Remote IP address The Internet Protocol (IP) address of the NE addressed through the IP tunnel.

Figure VII-32 IP Tunneling Tab in Comm. Ports Configuration Sheet

4.3.7 OSI TP4 Tunneling

A connection can be set up between two NEs through another network, using the OSI protocol. This is called OSI Tunneling. Two connections, OSI TP4 Tunnel 1 and OSI TP4 Tunnel 2, can be configured. Ethernet must be enabled with OSI Stack in order to use OSI TP4 Tunneling.

Network Service Access Point (NSAP)- address, Section address and NE address are used for set up of IP tunnels to other NEs.

The Communication Ports configuration sheet can be opened from the Configuration context menu of the Equipment node in the Explorer view.

Press the OSI TP4 Tunneling tab to view/change the OSI TP4 Tunneling settings. The sheet can also be invoked by selecting (highlighting) the Equipment node in the Explorer view and then selecting Edit Com-munication Ports from the Configuration menu.

Fields: Choices: Description:

Enabled: On/Off Toggles OSI Tunneling on/off Remote section address: Shows the section address of the NE

addressed though OSI TP4 Tunnel Figure VII-33 OSI TP4 Tunneling Tab in Comm. Ports Configuration Sheet

4.4 Looping

The loop settings are divided into five categories: Main traffic looping, 2Mbit/s Wayside traffic looping, 64kbit/s looping, 21x2Mbit/s looping and DS3/E3 looping.

4.4.1 Main Looping

The Looping configuration sheet can be opened from the Configuration context menu of the Equipment node in the Explorer view. Press the Main tab to view/change the Main looping settings. The sheet can also be invoked by selecting (highlighting) the Equipment node in the Explorer view and then selecting Edit Looping from the Configuration menu.

Figure VII-34 Looping Configuration Sheet

Fields: Description:

Loop buttons: One button for each loop where the arrow indicates which way the signal is looped. The colour of the loop arrows describes the status of the loop:

Blue: The status of the loop is unknown. Loop informa-tion has not been retrieved from the NE, or a loop message has just been sent to the NE and the GUI (Graphical User Interface) is waiting for a response from the NE. (The loop settings have not been confirmed by the NE). Note that the loop cannot be toggled when the status is unknown.

Black: The loop is off (inactive) Red: The loop is on (active)

Loops will be Displays the time of which all main traffic loops in the NE automatically will be cleared. This time is set by the user when activating cleared after: a loop.

The different main traffic loops (from left to right in Figure 34):

• 4. SORP, LT output to LR input loop, far-end (IDU)

• 1. SORP LR output to LT input loop, near-end (IDU)

• 14. IF loop, near-end (IDU)

• 15. IF loop, near-end (ODU)

• 16. RF loop, near-end (ODU) Buttons:

Close: Closes the property sheet.

Help: Press this button to get help on the current property sheet page. For help on an item, click at the top of the dialog box, then click the item.

4.4.2 64 Kbit/s Looping

The Looping configuration sheet can be opened from the Configuration context menu of the Equipment node in the Explorer view. Press the 64 Kbit/s Looping tab to view/change the looping settings. The sheet can also be invoked by selecting the Equipment node in the Explorer view and then selecting Edit Looping from the Configuration menu.

Figure VII-35 Looping Configuration Sheet. 64kbit/s Tab