Digicom 3910, 3911 operation manual Figure G-2. Sample Configuration Multipoint

Sample Configurations

Multipoint

Figure G-2 shows a sample configuration for multipoint applications.

TMp control modems can accept mixed inbound rates from tributary modems. For example, one inbound link may be configured for 14.4 kbps while another link experiencing line impairments may be configured for 9.6 kbps. The following control/tributary rate combinations are allowed: control at 19.2 kbps, tributaries at 14.4 or 9.6 kbps; control at 14.4 kbps, tributaries at 14.4 or 9.6 kbps; control at 9.6 kbps, tributaries at 9.6 or 7.2 kbps; control at 7.2 kbps, tributaries at 7.2 or 4.8 kbps; control at 4.8 kbps, tributaries at 4.8 or 2.4 kbps; control at 2.4 kbps, tributaries at 2.4 kbps. Tributary rates will never exceed control rates. If tributary and control rates are equal, reducing the control rate will automatically reduce the tributary rate.

19200(TMp)

	TX	Leased
DTE
	3910	A
(Sync)
	Cable 1	Cable 2

14400(TMp)

	TX
3910	B	DTE
		(Sync)
Cable 2		Cable 1
14400(TMp)
	TX
3910	C	DTE
		(Sync)

Cable 2 Cable 1

Figure G-2. Sample Configuration — Multipoint

Configuration Options

3910 A Use TMp (Control) default configuration options.

3910 B Use TMp (Trib) default configuration options.

3910 C Use TMp (Trib) default configuration options.

Cables

Cable 1 Use a standard, customer-supplied, EIA-232-D/V.24 cable with a DB-25-P (plug) connector at one end to attach to the modem. Attach this to the connector labeled DTE1.

Cable 2 Use part number 125-0053-1431 (an 8-position, 8-wire modular cord that is supplied with the modem). Attach this to the connector labeled LEASED.

3910-A2-GN32-40 September 1998 G-3