This gateway also offers transparent communication with the Cisco TelePresence Video Communication Server for call control and firewall traversal.

  1. General Details

    Organizations that use ISDN can now enjoy the benefits of high-definition video with the Cisco TelePresence ISDN Gateway. This high-capacity and scalable gateway:

    • Grows with your business demands
    • Provides transparent communication between all features of IP and ISDN video networks and devices
    • Supports content sharing over ISDN
    • Supports encryption
    • Supports high-definition video

    Simplified Integration and More

    Cisco’s TelePresence ISDN gateway solutions are used when there is more than one endpoint that needs access to a telepresence solution. These gateways offer simplified integration between IP and ISDN networks with complete feature transparency, including high definition (HD) video, content sharing, and encryption.

    In addition, an ISDN solution to connect to a single endpoint is now available. The Cisco TelePresence ISDN Link is a compact appliance for in-room ISDN and external network connectivity supporting Cisco TelePresence System endpoints. The ISDN Link helps ensure that ISDN can be used as primary, backup, or external connectivity for a high-quality and reliable telepresence experience.

  2. Features

    Endpoints Supported

    • H.323 IP voice and video endpoints

    • SIP voice and video endpoints
    • H.320 ISDN voice and video endpoints
    • PSTN audio only calls (telephones) through ISDN

    Video Standards

    • H.261, H.263, H.263+, H.264

    Video Resolution

    • QCIF, QSIF, CIF, SIF, iCIF, iSIF, 288p, 384p, 400p, 448p, VGA, 4CIF, 4SIF, 480p, SVGA, 576p, XGA, 720p

    Frame Rates

    • Up to 30 frames per second and 60 fields per second

    Audio Standards

    • G.711, G.722, G.722.1, G.728, Polycom ® Siren14 /G.722.1 Annex C

    Other Standards

    • H.323, H.320, H.233, H.234, H.235 (AES), H.239 (dual video), H.221, FTP, RTP, HTTP, HTTPS, DHCP, SNMP, NTP

    ISDN Signaling

    • Q.931, NFAS, 4ESS, DMS100 support

    ISDN Bonding

    • BONDING (ISO 13871)
    • H.221 aggregation
    • Automatic downspeeding on loss of ISDN B channels


    • H.320/H.323/SIP calls supported up to 2 Mbps
    • Total bandwidth and number of sites supported is limited only by ISDN capacity
  3. Product Video
  4. Documents