In a portable terminal device, it is possible to display information of caller and the like when a call is received. Incoming call signal reception means (11) receives an incoming call signal including a caller number, caller information, and ring type information. Image generation means (12) generates, based on the incoming call signal, a caller information image including at least a portion of the caller information as character information. Telephone dictionary registering means (13) registers the caller number, caller text information, and the caller information image in a telephone dictionary (14). Incoming call screen display means (15) receives the caller number and acquires the registered caller text information and the caller information image corresponding to the received caller number from the telephone dictionary (14). Incoming call screen display means (15) displays an incoming call screen including the caller text information and the caller information image.

Systems and methods for facilitating wireless intercom in a local communications network are disclosed. Exemplary implementations may: generate and transmit a first broadcast packet and a second broadcast packet to a set of end-user communication devices; receive a first device-specific packet, on a first channel by a first central antenna and during a first uplink time period; receive a second device-specific packet, on the first channel by the first central antenna and during a second uplink time period; receive the first device-specific packet, on a second channel by a second central antenna and during a third uplink time period; receive the second device-specific packet, on the second channel by the second central antenna and during a fourth uplink time period; generate a third broadcast packet that includes packetized downlink information; and transmit the third broadcast packet to the set of end-user communication devices.

A method for handing over a call from a first communication network to a second communication network, comprising the steps of: registering, by a first mobile client, in particular, an IP-PBX VoIP client, running on a mobile device, the mobile device with an IP-based PBX for the first communication network, following a naming convention, by sending a registration message from the first mobile client to the IP-based PBX, the registration message comprising an endpoint ID, establishing an active conversation over the first communication network, detecting, on the mobile device, a connectivity change with respect to the first communication network, wherein the further steps of retrieving, by the first mobile client, the status of the call impacted by the connectivity change, and subsequently transferring the call to the second communication network are carried out using SIP NOTIFY messages. Further, a communication system for carrying out the method is provided.

A private mobile radio network installation includes a plurality of devices each including a local private mobile radio network infrastructure including a core network module, a subscriber server and a base station module; a management system; and a network interface; wherein the devices are connected therebetween via their network interfaces, and wherein the management systems are configured to choose one of the devices; and connect the base station module of each device to the core network module of the chosen device to form a distributed private mobile radio network infrastructure.

A private mobile radio network installation includes a plurality of devices each including a local private mobile radio network infrastructure including a core network module, a subscriber server and a base station module; a management system; and a network interface; wherein the devices are connected therebetween via their network interfaces, and wherein the management systems are configured to choose one of the devices; and connect the base station module of each device to the core network module of the chosen device to form a distributed private mobile radio network infrastructure.

A method performed by a BS for cell selection or reselection is provided. The method includes transmitting, to a UE, allowed NPN information that is in a form of a CAG ID list or in a form of an SNPN ID list; and transmitting, to the UE, NPN information and area information associated with the NPN information via a SIB1, the NPN information including an NPN ID list. In a case that the allowed NPN information is in the form of the CAG ID list, the allowed NPN information enables the UE to perform a first procedure. In a case that the allowed NPN information is in the form of the SNPN ID list, the allowed NPN information enables the UE to perform a second procedure. ABS using the method is also provided.

A radio relay apparatus, which can monitor a status of a radio relay apparatus for realizing a three-dimensional network, without providing a dedicated line, is provided. The radio relay apparatus can fly and move in an upper airspace, and comprises a first antenna for transmitting and receiving a radio signal of a feeder link to and from a gateway station on a communication network side provided on the ground or on the sea, a second antenna for transmitting and receiving a radio signal of a service link to and from a terminal apparatus, a relay processing section for relaying the radio signal of the feeder link and the radio signal of the service link, which is provided between the first antenna and the second antenna, an information acquisition section for acquiring monitoring information on the status of the radio relay apparatus, and an information communication section for transmitting the monitoring information to the gateway station via the feeder link.

A method and system of providing telecommunication services for guests is disclosed. A guest's registration is received. An app on a mobile electronic device is linked to the registration. Calling features are activated based on the registration. The app on the mobile electronic device is connected to an external phone system so the mobile electronic device can be used to place and receive calls through the external phone system.

A method of establishing a communication link between a mobile terminal of a wireless network and a subscriber of a network, such as an enterprise network, and/or a residential network.

Systems and methods for facilitating wireless intercom in a local communications network are disclosed. Exemplary implementations may: generate and transmit a first broadcast packet and a second broadcast packet to a set of end-user communication devices; receive a first device-specific packet, on a first channel by a first central antenna and during a first uplink time period; receive a second device-specific packet, on the first channel by the first central antenna and during a second uplink time period; receive the first device-specific packet, on a second channel by a second central antenna and during a third uplink time period; receive the second device-specific packet, on the second channel by the second central antenna and during a fourth uplink time period; generate a third broadcast packet that includes packetized downlink information; and transmit the third broadcast packet to the set of end-user communication devices.