Huawei v200r001 user manual Features of E1 Voice, Signaling modes supported

User Manual - Configuration Guide (Volume 3)	Chapter 3
Versatile Routing Platform	E1 Voice Configuration

II. Interface divided into TSs logicailly & TS 16 not as special channel

When used as cE1 interface, all the other 31 TSs except TS0 can be divided into several groups, with each group of TSs used as one interface (channel-group) after being bound. Its logical attribute is equal to the synchronous serial ports of different rates. On the interface, link layer protocols such as PPP, FR, LAPB, X.25 and HDLC, and network protocols such as IP and IPX, are supported.

III. Interface divided into TSs logicailly & TS 16 as signaling channel

When DSS1 subscriber signaling is adopted, the interface is used as ISDN PRI interface. Since TS16 is used as transmission connection signaling for D channel, you can only bind TS 16 with any other TSs (except for TS0 and TS16) and use as one interface (pri-group). Its logical attribute is the same as ISDN dial-up. On this interface,

PPPlink layer protocol and network protocols such as IP and IPX are supported, and parameters such as DDR can be configured.

When the upper layer uses R2 signaling, the contents transported in the TSs are: Every 32 TSs constitute a basic frame; every 16 basic frames constitute one multiframe; the TS0 of every odd basic frame is used to transport the synchronous identity of the frame; the TS16 of every odd basic frame is used to transport line signaling. In each multiframe, the TS0 of the odd basic frame is used to transport FAS (Frame Alignment Signal), and that of the even basic frame is used to transport NFAS (Non Frame Alignment Signal). What transported on it is the state information about the links, which provides control signaling for basic rate multiplexing. The 4 significant bits of the TS 16 of the first basic frame (Frame 0) of every multiframe are used to transport the synchronous identity (Multiframe Alignment Signal (MFAS)) and the insignificant 4 bits are used to transport asynchronous identity. The TS16 of the other 15 basic frames transport the line state of every two TSs respectively, for instance, basic frame 1 is used to transport the states of TS1 and TS16; basic frame 2 is used to transport the states of TS2 and TS17.

3.1.3Features of E1 Voice

I.Signaling modes supported

DSS1 subscriber signaling is supported on ISDN PRI interface and R2 signaling is supported on E1 interface.

II. Protocols and standards supported

Support the relevant protocols under ITU-T H.323 frame and support the 5.3K and 6.3K compression algorithms of G.711, G.729 and G.723.1 Annex A of ITU standard, support CRC4 and non-CRC4 framing modes, support the two kinds of line coding of HDB3 and AMI.

III. Support single stage dialing and two-stage dialing

It supports the two access functions of single stage dialing and two-stage dialing, which adapts itself to the difference between various PBX exchanges in their transportation of called numbers to the router. When one PBX exchange is transporting voice access number to the router and the number is deleted, the router adopts single stage dialing access mode to access the subscriber. If PBX exchange does not delete the access

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