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Lync 2010: E1 versus SIP RRS feed

  • Question

  • Hi

    What is E1?
    What is SIP?
    what is SIP trunking?

    what are the benefits of SIP over E1?

    tnx

    • Edited by MGerio Friday, August 10, 2012 8:36 AM
    Friday, August 10, 2012 8:36 AM

Answers

  • E1 is the European format for digital transmission. .E1 carries signals at 2 Mbps (32 channels at 64Kbps, with 2 channels reserved for signaling and controlling.

    When you have a PBX in your company  you receive a E1 connection from you telephony provider and so you will have 30 channels to make calls.

    SIP : Session Initiation Protocol (SIP) is a standard protocol user for communications sessions like Voice and Video using the IP network. (VOIP). A Voip server, and VOIP phone use the SIP protocol. 

    Sip trunking  : it's a link using the SIP protocol to connect two devices, it's ususaly used to connect a VOIP server  (like Lync) to another VOIP server (Cisco Call Manager )  or to a gateway that can connect to your PABX (using proprietary protocol) or directly to your telephony proder network using a E1 connection.

    Sometimes you telephony provider can have a SIP trunk where you can connect to , so you don't need E1 connections, you can use your internet connection to phone.

    Benefits : internaly, you can use your IP network  to connect phone or to make call using a VOIP server (like Lync) you don't need other wiring.   externaly you can connect to another comprany using a sip trunk  using Internet connection without using Public telephone network or also to the world using a direct sip trunk to a provider.

    Rgds

    Jean-Marc

    • Proposed as answer by Lisa.zheng Tuesday, August 14, 2012 1:45 AM
    • Marked as answer by MGerio Wednesday, August 15, 2012 3:52 AM
    Friday, August 10, 2012 2:25 PM

All replies

  • E1 is the European format for digital transmission. .E1 carries signals at 2 Mbps (32 channels at 64Kbps, with 2 channels reserved for signaling and controlling.

    When you have a PBX in your company  you receive a E1 connection from you telephony provider and so you will have 30 channels to make calls.

    SIP : Session Initiation Protocol (SIP) is a standard protocol user for communications sessions like Voice and Video using the IP network. (VOIP). A Voip server, and VOIP phone use the SIP protocol. 

    Sip trunking  : it's a link using the SIP protocol to connect two devices, it's ususaly used to connect a VOIP server  (like Lync) to another VOIP server (Cisco Call Manager )  or to a gateway that can connect to your PABX (using proprietary protocol) or directly to your telephony proder network using a E1 connection.

    Sometimes you telephony provider can have a SIP trunk where you can connect to , so you don't need E1 connections, you can use your internet connection to phone.

    Benefits : internaly, you can use your IP network  to connect phone or to make call using a VOIP server (like Lync) you don't need other wiring.   externaly you can connect to another comprany using a sip trunk  using Internet connection without using Public telephone network or also to the world using a direct sip trunk to a provider.

    Rgds

    Jean-Marc

    • Proposed as answer by Lisa.zheng Tuesday, August 14, 2012 1:45 AM
    • Marked as answer by MGerio Wednesday, August 15, 2012 3:52 AM
    Friday, August 10, 2012 2:25 PM
  • Thanks Franc
    Wednesday, August 15, 2012 3:53 AM