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1000 Media Gateway Series Serial CPID Conﬁguration and Timing Application Note

Figure 3. DMG1000 Serial Protocol Conﬁguration Page Set to SMDI Mode

SMDI

Figure 3 shows the DMG1000 serial protocol conﬁgura-

tion page set to SMDI mode.

This is a representative SMDI packet (CPID) for a call

from 546, no answer redirected (the “N” after the logical

terminal number [LTN]) by 545 to LTN 0232:

\r\nMD0010232N0000000545 0000000546 \r\n^y

The LTN from the SMDI packet is matched with the

logical extension number conﬁgured on the serial

protocol page (see Figure 3) to determine which

DMG1000 port should be associated with the CPID

information. This CPID information is retained for Serial

CPID Expiration (msecs) (see Conﬁguration), waiting for

an incoming call on that port. When the call arrives, the

saved CPID information is placed in either the

from/diversion headers of an INVITE for SIP or the

calling party/H.450 diversion PDU ﬁelds of an H.323

SETUP.

Note that the CPID length and CPID padding strings

(see Figure 3) must match the corresponding SMDI

conﬁguration in the PBX in order for the DMG1000 to

properly parse these packets.

9086-02_DMG1000_CPDI_Config_an.qxd 6/13/07 2:04 PM Page 7

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Dialogic DMG1000 Manual de usuario Pagina 7